Article
Materials Science, Multidisciplinary
Dechun Ren, Lianmin Zhang, Yujing Liu, Haibin Ji, Shujun Li, Wei Jin, Jiafeng Lei
Summary: Hot isostatic pressing (HIP) can improve the mechanical properties and corrosion resistance of Ti-Ni alloys fabricated by selective laser melting (SLM) by mitigating internal defects. HIP treatment enhances the ultimate tensile strength, elongation to fracture, and corrosion resistance of SLM Ti-Ni alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Yuanyuan Zhang, Xinlong Ma, Xin Lin, Zhenchao Xia, Xiaolei Su, Weidong Huang
Summary: A Zr55Cu30Al10Ni5 bulk metallic glass composite (BMGC) was fabricated using selective laser melting (SLM) with argon gas atomized powder. The microstructure and tensile deformation behavior of SLMed Zr55 BMGCs were studied, revealing a periodic microstructure with three different zones and a stepwise tensile fracture behavior. Nanoindentation tests showed that the nanocrystal + amorphous crystalline zone had lower hardness and elastic modulus, resulting in a significant stress drop after the failure of the hard amorphous layers. This study further confirmed the feasibility of SLM technology for developing high-performance BMGCs for industrial applications.
Article
Nanoscience & Nanotechnology
Jian Chen, Xingyu Liao, Jingguo Shu, Libo Zhou, Cong Li, Yanjie Ren, Yan Niu
Summary: The study systematically investigated the SLM of Ti-15Mo alloy, particularly focusing on densification, microstructure, and mechanical properties. The samples processed by SLM exhibit a greater combination of high tensile strength and elongation due to the retention of omega phase, high dislocation density, finer grains, twinning-induced plasticity, and changes in texture orientation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
W. S. Cai, Y. Luo, A. Yan, L. M. Kang, L. C. Zhang, C. Suryanarayana, C. Yang
Summary: This study successfully fabricated high-strength and high-ductility NiTi alloys by adjusting the process parameters and systematically investigated their microstructure and mechanical properties. By studying the variation of recoverable strain, the optimized process parameters for the fabricated samples were identified.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Xingyu Pan, Chunlei Qiu
Summary: Adding quasi-crystal (QC) powder particles to high entropy alloy (HEA) during selective laser melting (SLM) can enhance the strength of the alloy. The microstructure and tensile properties of the material depend on the input energy density. Optimal energy density can result in a superior microstructure with dispersive columnar gamma grains and arc-shaped B2 phase, while high energy densities can lead to an undesirable grain structure.
Article
Engineering, Manufacturing
Defan Wu, Li Cui, Xu Wu, Xingye Guo, Wei Shao, Zhen Tan, Dingyong He
Summary: Cold metal transfer (CMT) welding of AlSi7Mg alloy sheets prepared by selective laser melting (SLM) using ER5356 filler wire was found to reduce porosity, refine grains, increase the fraction of high angle grain boundaries (HAGBs), modify eutectic Si-rich morphology, and improve solid solution strengthening. The welded joint with ER5356 wire achieved higher WM hardness and ultimate tensile strength (UTS) compared to ER4047 wire, attributed to reduced porosity and improved microstructures in the WM.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Chemistry, Physical
Hairui Ji, Ming-Chun Zhao, Bin Xie, Ying-Chao Zhao, Dengfeng Yin, Chengde Gao, Cijun Shuai, Andrej Atrens
Summary: Ti-xCu biomedical alloys prepared by selective laser melting show good antibacterial properties, with the optimal Cu content being 3 to 5 wt%. The hardness of the alloys increases with higher Cu content, and the size of Ti2Cu particles and grain size decrease as Cu content increases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yang Han, Shujun Chen, Xiaoqing Jiang, Yafeng Bai, Tao Yuan, Xuping Wang
Summary: The effect of electric current on microstructure, texture, deformation behavior and tensile properties during electrically assisted friction stir welding of Ti-6Al-4 V alloy was investigated. The introduction of current resulted in alleviating abrupt microstructural changes in the stir zone, decreasing texture strength, and promoting more uniformly distributed strain. The improved tensile properties of the electrically assisted joints were mainly attributed to microstructure and strain homogeneity, beta phase dissolution, and random orientations.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Jian Chen, Chaoying Li, Libo Zhou, Yanjie Ren, Cong Li, Xingyu Liao, Yuanjing Wang, Yan Niu
Summary: This study investigates the corrosion and tribocorrosion behaviors of selective laser melting processed Ti-15Mo alloy on different planes through electrochemical measurements and synergistic wear-corrosion analysis. The results demonstrate that the corrosion and tribocorrosion resistances vary among different planes and are attributed to the distinct microstructure of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Jungsub Lee, Hyunjong Ha, Jae Bok Seol, Jung Gi Kim, Eun Hyeok Seo, Seung Ki Moon, Im Doo Jung, Hyokyung Sung
Summary: In order to compensate for the porosity of high-speed printed Ti-6Al-4V specimens, a hot isostatic pressing (HIP) process was applied, which led to a deterioration phenomenon critically affected by the surface roughness of the as-built state. Efficient control can be achieved through setting the build angle.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Jiming Lv, Kaiyu Luo, Haifei Lu, Zhao Wang, Jiajun Liu, Jinzhong Lu
Summary: This research investigated the influences of laser shock peening (LSP) on the residual stress state, microstructures, and mechanical properties of Ti-6Al-4V alloy fabricated by selective laser melting (SLM). The results showed that LSP treatment adjusted the residual stress from tensile to compressive state and promoted the formation of high-density dislocations and parallel nano mechanical twins (nano-MTs) in the coarse lamellar alpha' structures, resulting in grain refinement. The ultimate tensile strength and elongation of the SLMed Ti-6Al-4V alloy increased by approximately 14.3% and 18.3% after LSP treatment, respectively. The study revealed that the combination of high levels of compressive residual stress and grain refinement achieved by LSP contributed to the enhancement of both strength and ductility in the alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Li Cui, Zhibo Peng, Yaoqing Chang, Dingyong He, Qing Cao, Xingye Guo, Yong Zeng
Summary: The susceptibility to hydrogen pores in the welded joints of SLM AlSi10Mg alloys was investigated through different welding methods. It was found that autogenous laser welding and single-pass laser welding had a high sensitivity to hydrogen pores, while LMD welding effectively reduced the size and porosity of the pores. SLM AlSi10Mg alloys exhibited lower hardness and ultimate tensile strength in laser welding compared to LMD welding, which can be attributed to the refined microstructures and reduced hydrogen pores in the welded metal.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Yi Lai, Ying Deng, Xin-wen Zhu, Yi-fan Guo, Guo-fu Xu, Ji-wu Huang, Zhi-min Yin
Summary: A new Al-4.77Mn-1.37Mg-0.67Sc-0.25Zr alloy was prepared using selective laser melting technique, and its microstructure and mechanical properties were investigated. The alloy exhibited relatively stable mechanical properties when the energy density ranged from 104 to 143 J/mm3, with yield strength, ultimate tensile strength, and elongation values of 335-338 MPa, 397-400 MPa, and above 11%, respectively. However, when the energy density exceeded 152 J/mm3, the alloy showed the formation of cavities and cracks, leading to a sharp decrease in elongation. Quantitative calculations revealed that solid solution strengthening, grain boundary strengthening, and precipitation strengthening accounted for 44%, 41%, and 15% of the total strengthening, respectively.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Multidisciplinary
Iman Harasani, Roohollah Jamaati, Hamed Jamshidi Aval
Summary: A bi-layered Ti-SS304 biocomposite was fabricated to prevent the release of toxic ions from stainless steel 304 layer, and its corrosion behavior in simulated body fluid was investigated. The results revealed that increased welding heat input during friction stir welding led to the formation of a thicker oxide layer on the titanium layer. The composite fabricated at a rotation speed of 1000 rpm and a traverse speed of 20 mm/min exhibited the lowest corrosion rate and current density, and the highest cell viability.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
H. Z. Lu, H. W. Ma, W. S. Cai, X. Luo, Z. Wang, C. H. Song, S. Yin, C. Yang
Summary: A stable tensile recovery strain induced by a Ni4Ti3 nanoprecipitate in a Ni50.4Ti49.6 shape memory alloy fabricated via selective laser melting was reported. The heat-treated SMA exhibited a larger strain/stress field inside the grain interior region and showed three-stage phase transformation. The results provide insights into tailoring the microstructure and functional properties of NiTi SMAs by SLM.
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sabine C. Bodner, Kostyantin Hlushko, Kevin Kutlesa, Juraj Todt, Oliver Renk, Michael Meindlhumer, Florian Resch, Marc-Andre Nielsen, Jozef Keckes, Jurgen Eckert
Summary: The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are explored in this study. The results show that the applied hatch strategy has a significant impact on the microstructure and mechanical properties of the samples, especially the anisotropy observed in the plane perpendicular to the build direction.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sepide Hadibeik, Florian Spieckermann, Martin Nosko, Farzad Khodabakhshi, Mahmoud Heydarzadeh Sohi, Juergen Eckert
Summary: A novel approach for fabricating bulk metallic glass using additive manufacturing has been studied, however, there are challenges, such as unmelted powder and compositional deviation, that need further investigation to optimize the process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nidhi Khobragade, Tapabrata Maity, Anna Swiderska-Sroda, Gierlotka Stanislaw, Witold Lojkowski, Pokula Narendra Babu, Snehanshu Pal, Debdas Roy
Summary: Graphene reinforced Cu-based nanocomposite (Cu-Gr) synthesized under high-pressure forming (-8 GPa) at 300 degrees C exhibited 96% relative density and an 84% improvement in electrical conductivity (IACS), as well as increased hardness and Young's modulus up to -94 GPa. The structure and defects evolution were investigated using nanoindentation and verified computationally. Molecular dynamics simulations showed consistent results with experiments, revealing that grain growth and grain boundary sliding (GBS) played a dominant role in deformation mechanisms involving dislocation motion, stacking faults (SFs), and twin boundary (TBs) formation, as well as matrix failure through grain growth and GBS with increased load, leading to subsequent bending processes.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Ming-Zhi Zhang, Kun Zhang, Kai-Kai Song, Xiao-Yu Zou, Wei-Dong Song, Ke-Feng Li, Li-Na Hu, Ze-Qun Zhang, Juergen Eckert
Summary: In this study, CoCrFeMnNi high-entropy alloys with a surface gradient nanostructure were produced using industrial shot blasting, which significantly improved their mechanical properties. The severely plastically deformed surface layer had a multi-scale hierarchical structure and increased in depth with shot-blasting time. The microhardness and tensile strength of the alloy were significantly higher after shot-blasting. The improved strain hardening and prevention of early necking in the gradient-nanostructured surface layer contributed to its high toughness.
Article
Chemistry, Physical
Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. J. Zehetbauer, Juergen Eckert
Summary: The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 iron-based metallic glasses were compared. HPT processing extended the consolidation and deformation ranges for Fe73.9Cu1Nb3Si15.5B6.6, and achieved consolidation and deformation with minimum cracks for Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time. Various analyses revealed that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibited HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 did not crystallize even at high HPT-deformation degrees.
Editorial Material
Chemistry, Multidisciplinary
Juergen Eckert, Daniel Kiener
Article
Engineering, Manufacturing
S. J. Yu, P. Wang, H. C. Li, R. Setchi, M. W. Wu, Z. Y. Liu, Z. W. Chen, S. Waqar, L. C. Zhang
Summary: The relationship between processing parameters, microstructure, and mechanical properties of Al-8.3Fe-1.3V-1.8Si alloy processed by laser powder bed fusion was investigated. Two alloys with different parameters were studied, showing different melt pool shapes and sizes. The microstructure of both alloys exhibited a lack of secondary phase in the melt pool and a nano-sized phase at the melt pool boundary. The difference in solid-solution strengthening and Orowan strengthening in the melt pool and melt pool boundary influenced the compressive yield strength and crack behavior of the alloys.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Chemistry, Physical
Keziban Huner, Baran Sarac, Eray Yuece, Amir Rezvan, Matej Micusik, Maria Omastova, Juergen Eckert, A. Sezai Sarac
Summary: The incorporation of iron and carboxylic acid-functionalized polyaniline into polymeric polycaprolactone structures enhances the electron-donating ability and conductivity of the compound, making it suitable for electrochemical immunosensors.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Engineering, Mechanical
Bin Chen, Yunli Li, Daniel Sopu, Juergen Eckert, Wenping Wu
Summary: The shock-induced dynamic mechanical behavior and spallation failure of Ni-based single crystal superalloys are studied using non-equilibrium molecular dynamic simulations. Two modes of classical spallation and micro-spallation are observed during the spallation failure. The deformation mechanism is dominated by slip and drag of dislocations at low shock velocities, while complex phase transitions from FCC to BCC or disordered structures occur at higher velocities, leading to a decrease in spallation strength. The presence of voids significantly lowers the spallation strength, and the reduction in strength is proportional to the radius of the voids.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Liu, Zongde Kou, Ruitao Qu, Weidong Song, Yijia Gu, Changshan Zhou, Qingwei Gao, Jiyao Zhang, Chongde Cao, Kaikai Song, Vladislav Zadorozhnyy, Zequn Zhang, Juergen Eckert
Summary: This study utilizes high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co34Cr32Ni27Al3.5Ti3.5 multicomponent alloy. Hot extrusion reduces grain sizes and promotes the precipitation of nanoparticles inside the FCC matrix and grain boundaries. Subsequent annealing regulates the microstructures and enhances the mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ming-Wei Wu, Kai Ni, Yang Lei, Xin-Xing Xiong, Yi-Ting Chuang, Quiao-En Lin, Pei Wang, Parthiban Ramasamy, Juergen Eckert
Summary: Selective laser melting (SLM) was utilized to produce CuZrAl metallic glass (MG) scaffolds with combined lattice structures of body-centered cubic and face-centered cubic (F2BCC), and the effects of lattice structures on mechanical behavior were investigated. The results revealed that curved struts remarkably enhanced compressive ductility by 122% and energy absorption by 106%. The presence of curved struts effectively prevented catastrophic shear fracture and delayed fracture occurrence due to the release of strain concentrations. This study demonstrates the potential of improving the ductility and toughness of SLM MG components through appropriate lattice structure design.
Article
Materials Science, Multidisciplinary
Yangping Dong, Dawei Wang, Qizhen Li, Xiaoping Luo, Jian Zhang, Konda Gokuldoss Prashanth, Pei Wang, Jurgen Eckert, Lutz Madler, Ilya V. Okulov, Ming Yan
Summary: In this study, strong and ductile pure Ti was synthesized via a reactive additive manufacturing method. The Ti was processed using laser powder bed fusion in an environment containing a mixture of argon and nitrogen gases. The presence of a nitrogen solid solution led to the formation of high-strength pure Ti with excellent uniform elongation, due to strong work hardening caused by the interaction of interstitial elements and submicrostructure. This reactive additive manufacturing approach opens up possibilities for in-situ strengthening of pure metals and alloys.
MATERIALS TODAY ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Xintian Wang, Zhiyong Ji, Robert O. Ritchie, Ilya Okulov, Juergen Eckert, Chunlei Qiu
Summary: In this study, TiAl and Cr3C2 particles were added to a CrMnFeCoNi alloy to improve its processibility and mechanical properties. The addition of TiAl particles resulted in the formation of cracks, but the further addition of Cr3C2 particles helped suppress hot cracking. The presence of long-range ordered domains and precipitates contributed to the improved strength of the dual-particle containing alloy.
MATERIALS TODAY ADVANCES
(2023)
Article
Chemistry, Physical
Baran Sarac, Remzi Gurbuz, Matej Micusik, Maria Omastova, Amir Rezvan, Eray Yuece, Lixia Xi, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study focuses on the synthesis and properties comparison of a novel organic composite nanofiber material consisting of styrene-butadiene-styrene (SBS) copolymer blended with polystyrene (PStyr) and carbon nanotubes (CNTs). The addition of CNTs retards the crystallization process and decreases the absorbance of both SBS/PStyr and PStyr/PBu in Fourier transform infrared spectroscopy. The interaction of CNTs with the blend is limited in samples with SBS, as observed in Raman spectroscopy.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(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)
