Article
Chemistry, Physical
Joung Sik Suh, Young Min Kim, Chang Dong Yim, Byeong-Chan Suh, Jun Ho Bae, Ho Won Lee
Summary: In this study, the mechanical properties of as-extruded Mg-Al-Zn-Mn-Ca-Y alloys were quantitatively investigated using interpretable machine learning (IML). The study revealed the importance of texture, solid solution, and secondary particles in the main strengthening mechanism of the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yang Zhao, Han Li, Chaojie Jing, Fangchao Zhao, Dingfei Zhang, Fusheng Pan
Summary: The effects of various Gd additions on the microstructure evolution, tensile properties, and corrosion resistance of Mg-6Zn-0.5Ca-1Mn (ZMX6105) alloys were examined. The addition of Gd promoted the formation of Ca2Mg6Zn3 phase during solidification and inhibited dynamic recrystallization, resulting in the refinement of dynamic recrystallized grains and strengthening of basal texture. Additionally, the ZMX6105-0.2Gd alloy exhibited excellent tensile properties and optimal corrosion resistance in a 3.5 wt% NaCl solution.
Article
Chemistry, Physical
Xinsheng Huang, Mingzhe Bian, Isao Nakatsugawa, Yasumasa Chino, Masahiko Sato, Kazumasa Yamazaki, Futoshi Kido, Hironori Ueda, Masashi Inoue
Summary: The study found that increasing the manganese content can significantly enhance the yield strength of Mg-3Zn-0.5Ca-0.5Al-xMn alloy, but further increasing to 1.5 wt% manganese content does not contribute to further strengthening. However, the alloy with 1 wt% manganese added achieved high strength, high formability, and improved thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Chunquan Liu, Xianhua Chen, Jiao Chen, Andrej Atrens, Fusheng Pan
Summary: The systematic investigation on microstructural evolution, texture, and mechanical properties of Mg-4Zn-xCa-yMn alloys revealed that alloying with Ca and Mn can enhance strength while reducing ductility. The addition of Mn can mitigate the traditional texture weakening effect of Ca.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Kun Yang, Hucheng Pan, Sen Du, Man Li, Jingren Li, Hongbo Xie, Qiuyan Huang, Huajun Mo, Gaowu Qin
Summary: A novel low-cost Mg-Al-Ca-Zn-Mn-based alloy has been developed to enhance both strength and ductility. The alloy exhibits high yield strength and elongation to failure, attributed to the ultra-fined dynamically recrystallized grains and high-density dislocations and nano-precipitates in the un-DRXed region.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Weiying Huang, Jianhua Chen, Zhen Jiang, Xi Xiong, Wei Qiu, Jian Chen, Xianwei Ren, Liwei Lu
Summary: This study investigates the effects of Ca content on the microstructure, texture, and mechanical properties of extruded Mg-3Al-0.4Mn-xCa (x = 0.4, 0.8, and 1.2 wt%) rods. The results demonstrate that the alloy with a Ca content of 0.8 wt% exhibits the highest strength and ductility. The transformation of texture and segregation of Ca at grain boundaries significantly influence the alloy's properties.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Metallurgy & Metallurgical Engineering
M. Kavyani, G. R. Ebrahimi, H. R. Ezatpour, M. Jahazi
Summary: This study investigated the microstructural evolution, mechanical properties, and biocorrosion performance of a Mg-Zn-Ca-Mn alloy under different processing conditions. The results showed that the alloy experienced grain refinement, improved mechanical properties, and enhanced biocorrosion resistance after undergoing the HECAP process. These findings suggest that HECAPed Mg-Zn-Ca-Mn alloy has great potential for biomedical applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
Caihong Hou, Fugang Qi, Lifei Wang, Liwei Lu, Nie Zhao, Jia She, Yun Zhou, Xiaoping Ouyang
Summary: The effects of Ca addition on the microstructure and mechanical properties of Mg-Zn-Sn-Mn alloys were investigated. With increasing Ca content, the eutectic phase and grains were refined, and the morphologies of the CaMgSn phases changed. Small amounts of Ca can improve properties at room temperature. However, increasing Ca content results in the deterioration of alloy properties. A small amount of Ca can improve the high-temperature plasticity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
T. Nakata, C. Xu, R. Abe, L. Geng, S. Kamado
Summary: The reheating at high temperature was used to control the textural features in a rolled Mg-Zn-Ca-Mn alloy sheet. Reheating at 450 degrees C caused grain coarsening, leading to the formation of double twinning and shear bands during rolling. Unexpectedly, the basal texture became strong due to the non-uniformly distributed dislocations. On the other hand, reheating at 350 degrees C resulted in uniform deformation-microstructure and apparent texture weakening during post-annealing.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
P. Emadi, B. Andilab, K. Borodianskiy, C. Ravindran
Summary: The use of lightweight alloys, such as magnesium, is crucial for improving fuel efficiency and reducing emissions in automobiles, as well as increasing the range of electric vehicles. This study investigated the effects of SiC nanoparticles on the microstructure and mechanical properties of Mg-Al-Zn-Mn alloy composites. The addition of SiC resulted in significant grain refinement, more uniform phase dispersion, and improved tensile strength, making it a promising material for strengthening light alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yun Feng, Yuanyuan Yang, Zongqi Xiao, Xianglong Meng, Guorong Zhou, Jinfeng Leng, Xinying Teng
Summary: The influence of aluminum on the mechanical properties and microstructure of Mg-Sn-Ca-Mn alloys was systematically investigated, and the addition of 1.5 wt% Al significantly increased the yield strength of the alloy. The extruded alloy exhibited a bimodal grain structure with dynamic recrystallized fine grains and coarse unrecrystallized grains. Additionally, the alloy with 1.5 wt% Al showed a significant enhancement in fiber texture.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yihao Bao, Liang Chen, Jianwei Tang, Zhigang Li, Guoqun Zhao, Cunsheng Zhang
Summary: In this study, a Mg alloy with alloying elements of Zn, Al, Sn, and Mn was designed, and hot extrusion was carried out at various speeds and temperatures. It was found that high speed extrusion resulted in more second phase particles, while high extrusion temperature increased the number of second phases, grain size, and dynamic recrystallization degree. The sample extruded at a speed of 10 mm/min and temperature of 300 degrees C showed the highest yield strength, tensile strength, and corrosion resistance.
MATERIALS CHARACTERIZATION
(2021)
Article
Metallurgy & Metallurgical Engineering
Wen-xue Fan, Yu Bai, Guang-yang Li, Xing-yang Chang, Hai Hao
Summary: The influence of Ca and Sm alloying on the texture evolution, mechanical properties, and formability of a hot-rolled Mg-2Zn-0.2Mn alloy was investigated. The results showed that the addition of Ca and Sm can decrease the average grain size and basal texture intensity, while significantly increasing the tensile strength, ductility and formability of the alloy. The synergetic addition of Sm and Ca further improved the ductility and formability by changing the Ca distribution and reducing the size of Ca-containing particles. This study provides a possibility of using Ca and Sm instead of RE elements in Mg alloys to achieve excellent mechanical properties and formability.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Yusuke Matsuoka, Mingzhe Bian, Xinsheng Huang, Yuhki Tsukada, Toshiyuki Koyama, Yasumasa Chino
Summary: The relationship between Zn content and room temperature mechanical properties of dilute Mg-xZn-0.1Ca alloy sheets was investigated. Increasing the Zn content resulted in a significant improvement in the formability. The relative activity of deformation modes did not show apparent differences between different Zn contents. The appearance of tilted basal poles and the development of TD-split texture contributed to the enhanced formability. The efficient scheme for parameter fitting required for VPSC simulation was proposed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Chongchen Xiang, Zhuo Huang, Zijian Wang, Hanlin Ding, Shun Xu
Summary: In this paper, Cu alloying was used to study Mg-Al-Ca-Mn-Cu magnesium alloys, aiming to develop magnesium alloys with higher heat conduction. The mechanical properties and thermal conductivity of the alloys were evaluated simultaneously due to the addition of Cu, meeting the requirements of developing high-strength and high-conductivity magnesium alloys. Compared with the commercial AZ31 magnesium alloy, the strength and plasticity of the alloys were improved through fine grain strengthening. Meanwhile, the amount of solid solution atoms in the alloy decreased and the content of the second phase particles increased, leading to a reduced degree of lattice distortion. On the other hand, the Cu element provided a large amount of free electrons for heat transfer, resulting in high thermal conductivity for the alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Metallurgy & Metallurgical Engineering
X. Q. Liu, X. G. Qiao, R. S. Pei, Y. Q. Chi, L. Yuan, M. Y. Zheng
Summary: The influence of extrusion rate on the microstructure and mechanical properties of the AXM1104 alloy was studied. With increasing extrusion rate, the grain size and particles diameter increased, while the grain boundary segregation and basal fiber texture decreased. The tensile yield strength decreased and the elongation to failure increased as the extrusion rate increased.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
Qinghe Wei, Lin Yuan, Xiao Ma, MingYi Zheng, Debin Shan, Bin Guo
Summary: This study investigates the effects of multidirectional forging (MDF) on a low-cost rare earth magnesium alloy, revealing that the Mg-7Gd-2Y-1Zn-0.5Zr alloy shows increased strength and elongation after undergoing extrusion, MDF, and T5 treatment. The alloy strength enhancement is attributed to solid solution strengthening, grain refinement, and aging precipitation mechanisms. Additionally, the dynamic recrystallization mechanism shifts from discontinuous to continuous during MDF at reduced temperatures, impacting deformation behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
S. Z. Wu, Y. Q. Chi, W. C. Xie, G. Garces, X. H. Zhou, H. G. Brokmeier, S. H. Qin, X. G. Qiao, M. Y. Zheng
Summary: The compressive deformation behavior of as-cast and as-extruded Mg92Y5Ni3 alloy was studied, revealing that the as-extruded alloy has higher micro-yielding strength, compressive yield strength, strain-hardening rate, and plastic strain compared to the as-cast alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Jing Zuo, Mingquan Zhang, Taiki Nakata, Guisong Wang, Danyang Li, Hailong Shi, Chao Xu, Xiaojun Wang, Wenjun Li, Guohua Fan, Lin Geng, Shigeharu Kamado
Summary: In this study, we investigated the effect of 0-1.0 at.% Al additions on grain refinement and phase transformation of the Mg-2.0Gd-1.2Y-0.5Zn-0.2Mn alloy containing LPSO phase. The addition of Al promoted the formation of the Al2RE phase and decreased the presence of LPSO phase and Mg3RE phase. The Al2RE phase acted as nucleants for α-Mg grains, resulting in a significant decrease in grain size.
Article
Materials Science, Multidisciplinary
Shiwei Xu, Congcong Zhu, S. Kamado, K. Oh-ishi, Yun Qin
Summary: This study systematically investigates the dynamic recrystallization behavior of as-cast AZ91 magnesium alloy under hot compression deformation at 350 degrees C. The results show that multiple DRX mechanisms, including twinning, grain boundary bulging, and particle-stimulated nucleation, are observed at 350 degrees C. Continuous DRX is the dominant mechanism at this temperature. Compared to hot compression at 300 degrees C, the DRX grain size and volume fraction increase after hot compression at 350 degrees C.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Zhao Yang, Taiki Nakata, Chao Xu, Gang Wang, Lin Geng, Shigeharu Kamado
Summary: A high-performance Mg-8Gd-4Y-0.5Mn-0.2Sc alloy was fabricated using homogenization, hot extrusion, and ageing. The microstructure evolution during homogenization was studied, and an optimum time of 18 h was determined to minimize the volume fraction of second phase particles and maintain a fine grain structure. The alloy exhibited excellent age-hardening ability and strength after peak-aged treatment, with a tensile yield stress of 441 MPa and an ultimate tensile strength of 506 MPa. The high yield strength was attributed to the co-existing bimodal microstructure, fine dynamically recrystallized grains, dense precipitated particles, and nano-scale precipitates. Precipitation strengthening was revealed as the dominant strengthening mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yuanqing Chi, Jinwei Liu, Zhijie Zhou, Shouzhong Wu, Weiqing Liu, Mingyi Zheng
Summary: This study mainly investigates the microstructure, texture, and mechanical properties of Mg-Gd-Y alloys (Mg-8.5Gd-2.5Y-0.3Zr (wt%) (0Zn) and Mg-8.5Gd-2.5Y-0.5Zn-0.3Zr (wt%) (0.5Zn) alloys) under indirect extrusion at different temperatures. The addition of 0.5 wt% Zn promotes the dynamic precipitation of beta-Mg5RE phases, resulting in a well-distributed distribution in the 0.5Zn alloy compared to a local distribution in the 0Zn alloy. The presence of zinc and the extrusion temperature influence the texture formation and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Wei Du, Yuzhou Du, Zhenlei Yang, Bo Ma, Yanfeng Ge, Bailing Jiang
Summary: This paper investigates the role of long-period stacking-order (LPSO) structure on the corrosion behavior of an Mg-Gd-Y-Zn-Zr alloy. It is found that the LPSO phase deteriorates the corrosion properties of the alloy, mainly through galvanic corrosion.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Industrial
Zijian Zhang, Lin Yuan, Mingyi Zheng, Qinghe Wei, Debin Shan, Bin Guo
Summary: This study developed a large-scale AZ80 magnesium alloy sample through a two-step MDF process and artificial aging. The sample exhibits uniform mechanical properties and good plasticity, making it suitable for load-bearing components. Furthermore, this process can benefit the general application of magnesium alloys since the excellent mechanical properties do not rely on the addition of specific elements.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
S. Z. Wu, Y. Q. Chi, G. Garces, X. G. Qiao, M. Y. Zheng
Summary: The Mg96Y2Ni2 (at. %) alloy with a volume fraction of 50% of LPSO phase was processed by extrusion and ECAP. Different microstructures of bimodal alpha-Mg matrix and fully dynamic recrystallized matrix were obtained by controlling the processing parameters, and the relationship between microstructure and tensile properties was investigated. The extruded alloy at 390 degrees C showed ultrahigh tensile yield strength but low elongation to failure, while the alloy extruded at 450 degrees C exhibited a balanced strength-ductility behavior. Fully recrystallized ultra-fine Mg grains contributed to the increase of elongation to failure. This work provides theoretical guidance for developing Mg-LPSO two-phase alloys with excellent strength-ductility synergy.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
C. C. Li, Z. H. Xia, X. G. Qiao, I. S. Golovin, M. Y. Zheng
Summary: The study investigated the influence of Mn content (0.4, 0.8, 1.2 wt.%) on the microstructure and mechanical properties of as-extruded dilute binary Mg-Mn alloys. Increasing Mn content resulted in a decrease in the volume fraction and size of dynamically recrystallized (DRXed) grains. Segregation of Mn atoms and nano alpha-Mn dynamical precipitates were observed at the grain boundaries, with the amount of precipitates increasing with Mn content. Tensile tests showed that Mn content significantly affected mechanical properties, with the Mg-0.8 wt.% Mn alloy exhibiting excellent ductility at room temperature.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
T. Nakata, T. Matsuno, R. Oki, S. Kamado
Summary: The effect of micro-texture on the tensile properties and room-temperature stretch formability of Mg-Al-Zn alloy sheet was studied. The introduction of micro-texture through solution treatment, hot-rolling, and post-annealing increased the fraction of a unique texture component, which improved the limiting dome height without compromising the strength due to the high activity of tensile twinning and minimal change in the Schmid factor for basal slips. This finding highlights the importance of micro-texture designing for the development of high strength-formability synergy in magnesium alloy sheets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Mechanical
Zhitao Hu, Yuzhou Du
Summary: A vertically continuous casting technique was used to produce a ductile iron pipe, and the tribological behavior of austempered ductile iron (ADI) was examined under various service conditions. The study found that ADI's tribological behaviors were significantly influenced by normal loads and sliding speeds. Spheroidal graphite was preferentially transferred from the matrix to the tribosurface in ADI under high normal loads, and high sliding speed accelerated the formation of the graphite lubricating layer. As a result, ADI's friction coefficient decreased with increasing normal load and sliding speed. The wear rate of ADI followed a similar trend, increasing with higher normal load and decreasing with higher sliding speed. The worn surface indicated that adhesive wear occurred at low sliding speeds, while abrasive wear was the primary wear mechanism at high sliding speeds.
Article
Materials Science, Multidisciplinary
Chen Liu, Yuzhou Du, Pengchun Li, Xin Wang, Wanting Sun, Caiyin You, Bailing Jiang
Summary: The evolution of ductile iron with a martensitic matrix during annealing at 700°C was studied in this research. The results showed that ultrafine graphite nodules can be obtained in ductile iron through annealing treatment, and the number of nodules can be increased by extending the annealing time. The precipitation of ultrafine graphite nodules improves the strength and plasticity of ductile iron.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Xiaoqing Liu, Xiaoguang Qiao, Liyao Ye, Xianke Zhang, Mingyi Zheng
Summary: A Mg-1Al-1Ca-0.4Mn (AXM1104, wt%) alloy extruded at 250°C with a ram speed of 0.1 mm/s obtains a unique bimodal microstructure. The as-extruded alloy exhibits a high tensile yield strength of 474 MPa and a low ductility of 2.1%, surpassing conventionally extruded rare-earth-free Mg alloys reported so far. After annealing at 300°C for 10 min, the annealed alloy achieves a good strength-ductility balance, with a yield strength of 426 MPa and an elongation of 5.4%. The ultrahigh yield strength of the as-extruded alloy is attributed to the combined strengthening effect of grain boundary, dislocation, and texture, while the as-annealed alloy is mainly strengthened by both grain boundary strengthening and precipitation strengthening from planar Al2Ca nano phase.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
