Article
Materials Science, Multidisciplinary
Hongpo Wang, Jian Kang, Yu Wang
Summary: The use of scrap steel is expected to increase in order to reduce carbon emissions. However, the enrichment of residual elements in steel production during recycling has become a problem. This study investigates the formation of arsenic compounds in La-added molten steel, identifying two compounds - La-S-As and La-As - for the first time. These compounds mainly consist of La-S-As, La-As, and LaAsO4, with La4S3As identified as a solid solution resulting from the replacement of S atoms with As in LaS. La4S3As started to form in molten steel and aggregated to generate large clusters that floated up mostly, providing a new strategy for reducing residual elements in molten steel represented by arsenic.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
May Likha Lwin, Dong-won Shin, Sun Woo Nam, Yohan Go, Young Min Kim, Taek-Soo Kim, Ji-Woon Lee, Soon-Jik Hong
Summary: The effect of single and co-addition of rare earth elements Nd and Dy on the microstructure, mechanical properties and corrosion behavior of AZ31 magnesium alloys was investigated. The results showed that the addition of Nd and Dy significantly improved the corrosion resistance of the magnesium alloys, while having little effect on the mechanical properties.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
S. Gupta, A. V. Lukoyanov, Yu. V. Knyazev, Yu. I. Kuz'min, K. G. Suresh
Summary: Rare earth intermetallics RRhSi (R=Tb, Dy, Ho) exhibit antiferromagnetic ordering and large magnetocaloric effect, with DyRhSi and HoRhSi compounds showing field-induced metamagnetic transition. Theoretical calculations confirm the antiferromagnetic ordering and negligible contribution of magnetic moment from Rh atom in these compounds. Optical measurements support the theoretical calculations, revealing electronic states involved in the formation of magnetic and spectral properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Guoming Zheng, Bin Tang, Songkuan Zhao, Yizhen Xie, William Yi Wang, Jinshan Li, Lei Zhu
Summary: Dislocation slipping and mechanical twinning control the plastic deformation of lamellar micro-structure (LM) in TiAl intermetallics. However, when the interlamellar spacing is reduced to the nanometer scale, the deformation mechanism switches to the development of long-period stacking-ordered (LPSO) structures. The formation of LPSO structures during deformation can result in greater high-temperature yield strength compared to LMs deformed via dislocation gliding or mechanical twinning.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Qiqiang Zhang, Bo Wen, Jia Luo, Yanchun Zhou, Xingyuan San, Yiwang Bao, Qingguo Feng, Salvatore Grasso, Chunfeng Hu
Summary: In this paper, a new ternary layered MAX phase Sc2PbC was predicted by combining rare earth element Sc and lead-containing MAX. Sc2PbC with a purity of 87.40 wt% was successfully synthesized and its crystal structure and atomic positions were obtained through X-ray diffraction. The Rietveld refinement results confirmed the typical MAX phase P63/mmc (No.194) space group of Sc2PbC with specific lattice parameters and atomic positions. Scanning electron microscope analysis revealed the typical MAX phase layered microstructure in Sc2PbC bulk. Energy dispersive spectroscopy measurements confirmed the composition of Sc2PbC within the allowable error range, validating it as a new MAX phase compound.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Gang Chen, Yuankang Wang, Xizheng Wang, Yunhao Zhao, Qi Dong, Liangyan Hao, Min Hong, Miao Guo, Haiyu Qiao, Wei Xiong, Liangbing Hu
Summary: In this study, a target-sintering approach was developed to synthesize single-phase intermetallics. Utilizing the ultrafast high-temperature sintering method, a range of single-phase Ti-Al intermetallics were successfully synthesized, demonstrating the potential for more controllable properties in material design and promising applications in various intermetallic and alloy systems.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yan Long, Wenxing Meng, Florian Vogel, Guiqi Li, Lijing Zhang
Summary: In this study, two multi-principal element alloys were fabricated and the effect of Gd on the microstructure and mechanical properties was investigated. The addition of Gd led to the precipitation of a new phase and a decrease in grain size, resulting in a significant increase in yield strength with a minor sacrifice in plasticity. The enhanced strength was attributed to grain boundary strengthening and precipitation strengthening.
MATERIALS & DESIGN
(2023)
Article
Metallurgy & Metallurgical Engineering
Fa Ji, Rui Xu, Yu-long Gao, Qing-chao Tian, Lu Wang, Zhi-xia Xiao, Fu-xing Yin
Summary: Large-sized precipitates negatively affect the thermal fatigue of H13 hot work die steel. Addition of different amounts of Ti and/or rare earth in H13 steel during electroslag remelting can improve element segregation and refine large-sized precipitates, but excessive Ti and rare earth content may lead to element segregation issues and hinder the refinement of precipitates.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Chun Chiu, Ching-Ju Su, Wei-Hsuan Yu, Eugen Rabkin
Summary: In this study, Mg-GdH2 composite was prepared by internal hydrogenation treatment of Mg-5Gd alloy. The results showed that the strength of the composite was inferior to that of the alloy, but the ductility increased. The potential of internal hydrogenation treatment to improve the strength of Mg-RE alloys was inferred.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Zijian Yu, Xi Xu, Kang Shi, Baotian Du, Xiuzhu Han, Tao Xiao, Shubo Li, Ke Liu, Wenbo Du
Summary: A low RE containing Mg-3Y-2Gd-1Nd-0.5Zr alloy with high strength-ductility synergy was successfully developed through combined processes of hot extrusion, hot rolling and ageing. The alloy exhibits excellent strength-ductility balance, better than many Mg-RE wrought alloys with higher RE concentration, and comparable to 6061 Al wrought alloy. A novel heterogeneous structure consisting of long-range chain-like structures and precipitate-free zones plays a key role in the concurrent strengthening and toughening of the alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Nanoscience & Nanotechnology
S. L. Cai, D. Q. Li, S. C. Liu, J. J. Si, J. Gu, L. X. Zhou, Y. F. Cheng, C. C. Koch
Summary: Cryogenic reciprocating torsion (CRT) was used to improve the strength of aluminum wires without significant sacrifice of electrical conductivity. The CRT processed wires possess multiple gradient structures (MGSs), with nanoscale precipitates contributing the most to the exceptional properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Yuqian Zhou, Chao He, Qian Ma, Anze Shui
Summary: Aluminum titanate (Al2TiO5, AT) flexible ceramics modified with rare-earth oxides (La2O3 and Y2O3) were successfully prepared and analyzed by XRD and SEM. The addition of La2O3 and Y2O3 generated second-phase grains, which improved the flexural strength by strengthening the branch and deflection phenomena, and hindering crack propagation. The presence of second-phase grains also resulted in a decrease in grain size and degree of oriented arrangement.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Vladimir A. Esin, Marie Francois, Lisa T. Belkacemi, Daniel Irmer, Louise Briez, Henry Proudhon
Summary: The crack deviation phenomenon in fatigue testing of AA2050 has been investigated, revealing that the misorientation angle of grain boundaries is the origin of crack deviation. Intermetallic compounds do not play a major role in causing crack deviation. The unrecrystallized state of AA2050 with layered strained structure promotes crack deviation when a critical internal misorientation is reached.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Ceramics
Shuqi Guo, Gaku Okuma, Kimiyoshi Naito, Hideki Kakisawa
Summary: In this study, TaB2-SiC composites with and without rare-earth oxides were fabricated and the effects of rare-earth oxides on their mechanical properties were investigated. The results showed that the addition of rare-earth oxides improved the sinterability, microstructure, and fracture toughness of the composites, but decreased the shear and Young's moduli as well as the hardness. Additionally, the effects of rare-earth oxides on the strength and toughening of the composites were temperature-dependent.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Chemistry, Physical
Runrun Xu, Miaoquan Li
Summary: This study used EBSD and TEM technologies to investigate the deformability of Ti-42.9Al-4.6Nb-2Cr alloy and the coordination deformation mechanism between the beta phase and gamma phase, revealing that all Schmid factors for slip systems in the beta phase were larger than 0.25, mainly achieved through the fast CDRX rate of the beta phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Lixiang Yang, Yuanding Huang, Zhengquan Hou, Lv Xiao, Yuling Xu, Xiwang Dong, Fei Li, Gerrit Kurz, Baode Sun, Zhongquan Li, Norbert Hort
Summary: A Mg-3Y-2Gd-1Nd-0.4Zr alloy with low rare earth content was developed and prepared by sand casting with a differential pressure casting system. The aged alloy exhibited excellent comprehensive mechanical properties due to the formation of fine dense plate-shaped beta' precipitates during aging. This new developed alloy showed better properties compared to commercial WE43 alloy for fabricating large complex thin-walled components.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Yuling Xu, Yuanding Huang, Yuye Wang, Weiming Gan, Shiwei Wang, Emad Maawad, Norbert Schell, Norbert Hort
Summary: In this study, the texture evolution of two Mg materials during tension is investigated. It is found that pure Mg and Mg-15Gd alloy exhibit different deformation modes, with pure Mg showing a dominant prismatic slip and Mg-15Gd alloy showing a complex behavior of twinning and multiple slips. The critical resolved shear stress ratios between non-basal slip and basal slip are lower for Mg-15Gd alloy compared to pure Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Shaozhu Wang, Yuanding Huang, Lixiang Yang, Ying Zeng, Yaozeng Hu, Xiao Zhang, Qiang Sun, Shaojun Shi, Guangyao Meng, Norbert Hort
Summary: The effects of adding different amounts of AlN nanoparticles on the microstructural evolution and strengthening mechanisms of Mg-3Sn-1Ca based alloys were investigated. It was observed that increasing the amount of AlN nanoparticles led to a significant decrease in grain size. The presence of AlN nanoparticles refined the primary crystal phases and provided more nucleation sites for the formation of magnesium. Additionally, the nanoparticles restricted grain growth during solidification. The addition of AlN nanoparticles resulted in improved tensile properties and hardness at both room temperature and high temperature.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Sihang You, Yuanding Huang, Hajo Dieringa, Emad Maawad, Weimin Gan, Yaping Zhang, Karl Ulrich Kainer, Regine Willumeit-Roemer, Norbert Hort
Summary: The addition of rare earth element Y can effectively improve the creep properties of magnesium alloys, enhancing both ambient strength and high temperature strength. Y additions exhibit a linear relationship with the yield strength of Mg-Y alloys at room temperature, but reduce the yield strength at high temperatures. These alloys also demonstrate high thermal stability above 200 degrees C. The creep resistance of magnesium is largely improved with small amounts of Y, but further increasing Y content weakens its contribution to creep resistance.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hong Yang, Bin Jiang, Guangsheng Huang, Yuanding Huang, Yiming Jin, Sarkis Gavras, Hajo Dieringa
Summary: The influence of different Al contents on the microstructural evolution and creep resistance of Mg2.85Nd-0.92Gd-0.41Zr-0.29Zn alloy was investigated. It was found that the additions of 0.5 wt% and 1 wt% Al significantly decreased the creep rate, while the addition of 2 wt% Al led to decreased creep properties. Microstructural analysis revealed changes in grain coarsening or refinement and phase transformation with different Al contents. Creep resistance was enhanced by the additions of 0.5 wt% and 1 wt% Al, but deteriorated by the addition of 2 wt% Al due to the detrimental microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Di Zhao, Chaoyue Zhao, Xianhua Chen, Yuanding Huang, Norbert Hort, Sarkis Gavras, Fusheng Pan
Summary: This study investigated the compressive deformation behavior of as-extruded magnesium alloys at various deformation temperatures. The results showed that the VZ63 alloy had a higher compressive yield strength at room temperature, a lower deformation activation energy, and a higher fraction of dynamically recrystallized grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Yiyi Lu, Yuanding Huang, Julia Bode, Carla Vogt, Regine Willumeit-Romer, Karl Ulrich Kainer, Norbert Hort
Summary: The influences of Gd additions and T4 treatment on the mechanical properties and corrosion of Mg-Gd alloys were investigated. Gd solid solution and intermetallic particles were found to improve the hardness and strength of the alloy, while increasing Gd additions led to higher corrosion rates. T4 heat treatment effectively reduced degradation rates and susceptibility to pitting. Mg-2Gd alloy showed a favorable combination of mechanical properties and low homogeneous degradation rate, making it a potential candidate for implants.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Dongdi Yin, Shupeng Li, Kexin Sun, Ruihao Fu, Yingbo Zhang, Bin Jiang, Yuanding Huang, Ying Zeng
Summary: The newly developed Mg-Y-Sn extrusions, prepared by adding Sn to Mg-6Y, exhibit superior elevated-temperature strength. The addition of Sn introduces thermal-stable micron/nano-scale precipitates. Mg-6Y-1.5Sn, with more nano-scale precipitates, demonstrates better elevated-temperature strength. This enhancement is attributed to the combined effect of thermal-stable multiscale precipitates and grain structures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Zijian Yu, Yuanding Huang, Linlin Liu, Kang Shi, Baotian Du, Ke Liu, Shubo Li, Wenbo Du
Summary: A new strategy of using Li addition to solve the strength-ductility trade-off in Mg-Gd alloys is reported. Li addition promotes the precipitation of different phases and enhances the activity of dislocations, resulting in simultaneous improvement in yield strength and ductility. Moreover, Li addition reduces the density, increasing the specific yield strength.
SCRIPTA MATERIALIA
(2022)
Article
Crystallography
Maria Nienaber, Gerrit Kurz, Dietmar Letzig, Karl Ulrich Kainer, Jan Bohlen
Summary: The application of magnesium flat products is affected by the limited formability at room temperature and the anisotropy of the mechanical properties, which is mainly caused by the underlying hexagonal crystal structure of magnesium and the development of strong crystallographic textures during massive forming processes. This study focuses on the influence of the manufacturing process on the microstructure and texture evolution of flat products made of conventional magnesium alloy AZ31, and discusses the effects on mechanical properties and formability.
Article
Materials Science, Multidisciplinary
Xiaoying Qian, Hong Yang, Chunfeng Hu, Ying Zeng, Yuanding Huang, Xin Shang, Yangjie Wan, Bin Jiang, Qingguo Feng
Summary: The study successfully improved the homogenized dispersion of nanoscale Al2O3 whiskers in Mg matrix composites by utilizing the potential difference between positive and negative ions. The addition of suitable amounts of SDBS and CTAB promoted more uniformly mixed composite powders, with the modified composite powders showing stronger cohesion.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Chemistry, Physical
Hongcan Chen, Tianci Xie, Quan Liu, Yuanding Huang, Bin Liu, Qun Luo, Qian Li
Summary: This study further improved the mechanical properties and thermal conductivity of Mg-Zn-La/Ce alloys through aging treatment, achieving good comprehensive performance. The addition of La/Ce forms a ternary tau 1 phase that reduces the supersaturation of the Mg matrix and has a positive effect on thermal conductivity. Precipitation has two opposite effects on thermal conductivity, reducing supersaturation but hindering the free movement of electrons and phonons.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Lingling Fan, Mingyang Zhou, Yuwenxi Zhang, Hajo Dieringa, Xiaoying Qian, Ying Zeng, Xianwen Lu, Yuanding Huang, Gaofeng Quan
Summary: Heterogeneous TiC/AZ61 nanocomposites were fabricated to enhance both the strength and ductility of Mg matrix composites. The proportion of TiC-rich fine grain (FG) zones and TiC-rare coarse grain (CG) bands could be adjusted by changing the mechanical ball milling time. The composites achieved excellent mechanical properties with a volume fraction of 25% CG bands after 20 h of ball milling, which was attributed to the presence of geometrically necessary dislocations (GNDs) in the CG bands.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Review
Metallurgy & Metallurgical Engineering
Hui Shi, Yuanding Huang, Qun Luo, Sarkis Gavras, Regine Willumeit-Roemer, Norbert Hort
Summary: This article provides a brief overview of the diffusion behavior of Mg alloys and discusses the methods for detecting and extracting diffusion coefficients. It reviews the diffusion data of Mg alloys and highlights their significance in designing and applying these alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hui Shi, Yuanding Huang, Lixiang Yang, Chunquan Liu, Hajo Dieringa, Chong Lu, Lv Xiao, Regine Willumeit-Roemer, Norbert Hort
Summary: This study investigates the creep behavior and microstructural evolution of sand-cast Mg-14Gd-0.4Zr alloy using compressive creep tests. The results show that the coherent distribution of beta' and beta' (F) phases effectively impedes dislocation movement and enhances creep resistance. However, with increasing creep time, the fine precipitate chains coarsen and transform into different phases, leading to stress concentration and increased creep strain.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Physical
M. H. Abbasi, R. Tavakoli, S. G. Shabestari
Summary: The correlation between atomic-scale structure and glass-forming ability of ternary bulk metallic glasses was investigated using molecular dynamics simulation. It was found that the potential energy of the icosahedra reflects the geometric ordering, while the virial stress energy density reveals the chemical ordering. Based on this discovery, a new prediction criterion for glass-forming ability was proposed and validated using experimental data.
Article
Chemistry, Physical
Haimin Zhai, Shuai Cui, Sheng Li, Dongqing He, Bo Cheng, Xinjian Zhang, Wensheng Li, Zhornik Viktor, Uladzimir Seniuts
Summary: Laser shock peening (LSP) treatment significantly affects the phase structure and properties of titanium-based BMG materials, promoting rejuvenation and introducing heterogeneity. This leads to improved plasticity and resistance to crack propagation. LSP-1 specimen exhibits higher hardness and plasticity, reducing fatigue peeling wear caused by brittleness. However, excessive LSP results in increased susceptibility to pitting and significantly reduces tribocorrosion resistance.
Article
Chemistry, Physical
Olga A. Blatova, Maria A. Solodovnikova, Ekaterina M. Egorova, Vladislav A. Blatov
Summary: This study applied a universal geometrical-topological approach to analyze the crystal structures of intermetallic compounds deposited in the Inorganic Crystal Structure Database. By exploring the local atomic configurations, they identified different types of coordination polyhedra and proposed criteria for determining geometric instability. This research provides useful indicators for checking crystallographic information and validating structural models.
Article
Chemistry, Physical
Jose M. Torralba, Diego Iriarte, Damien Tourret, Alberto Meza
Summary: The amount of globally recycled e-waste is less than 20% of the total produced. One of the causes for this low recycling rate is the complex and expensive selective sorting of metals. However, recent research has shown that high entropy alloys (HEAs) can be made from complex alloy mixtures, reducing the dependence on pure critical metals. It has been demonstrated that e-waste can be used to produce competitive HEAs.
Article
Chemistry, Physical
M. Y. He, Y. F. Shen, N. Jia, W. Y. Xue, J. P. Li
Summary: This study successfully improved the mechanical properties of high-entropy alloys (HEAs) through phase decomposition modulation, achieving strengthening of low-cost CuFeMnNi HEAs. The annealed HEAs exhibited excellent mechanical properties, with significantly increased yield strength and maintained satisfactory elongation.
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, F. R. Pratama
Summary: In this study, the growth rate of a crystalline phase in the Al-Fe-Mn-Si metallic glass was measured in real time using transmission electron microscopy. The effective diffusion coefficient related to the slowest diffusing element (Mn) was estimated. The results showed that the growth rate of the crystalline phase was significantly faster compared to pure Al and AlFe compound.
Article
Chemistry, Physical
Zhenhua Han, Yubo Tian, Jun Yang, Jianzhao Li, Jinyang Zhang, Gang Liu, Ran Wei, Guojun Zhang
Summary: In this study, a novel medium-entropy alloy (MEA) (Fe65Ni15Cr10Co10)92Ti5Al3 with a dual heterogeneous structure was developed by adding Ti and Al to a previously reported Fe65Ni15Co10Cr10 MEA. The MEA exhibited ultra-high ultimate tensile strength and work hardening extent at room temperature. The addition of Ti and Al induced precipitation and resulted in a continuous FCC -> BCC martensitic transformation and a transformation-induced plasticity effect. The excellent mechanical properties of the alloy were attributed to the synergistic effects of hetero-deformation induced strengthening, precipitation strengthening, and TRIP.
Article
Chemistry, Physical
S. Y. Liang, L. T. Zhang, B. Wang, Y. J. Wang, E. Pineda, J. C. Qiao
Summary: This study focuses on the influence of the thermomechanical protocol on the aging or rejuvenation of glass by decoupling the thermal and mechanical processes. The results show that Labased metallic glass exhibits material hypomnesia, with a clearer rejuvenation trend observed after imposing increasing amplitude strain oscillations. There is a threshold value of the oscillation amplitude that separates the effects of the protocol into acceleration of aging or rejuvenation. This study reveals the correlation between the thermomechanical properties of metallic glass and the previous application of strain oscillations of various amplitudes, providing an effective tool for regulating the structural state of metallic glasses through a simple-operated method.
Article
Chemistry, Physical
Chihui Liu, Hua Zhang, Qing Wang, Panzhi Wang, Jiadian Yang, Fanchao Meng, Xin Zhou, Lilong Zhu, Shangzhou Zhang, Liang Jiang
Summary: Thermal deformation behavior and microstructure evolution of GH141 alloy were efficiently studied using high-throughput double-cone gradient compression. Different compression temperatures resulted in a wide gradient equivalent strain distribution and gradient microstructure. The dynamic recrystallization mechanism shifted towards discontinuous dynamic recrystallization with increasing compression temperature.
Article
Chemistry, Physical
D. Dubaux, J. Zollinger, M. -C. de Weerd, J. Ghanbaja, S. Mathieu, S. Migot, P. Boulet, S. Sturm, V. Fournee, M. Sicot, J. Ledieu
Summary: We report the formation of large and highly twinned dendrites of the Al13Fe4 approximant phase embedded in an fcc Al-rich matrix. Using a rapid cooling technique, the approximant appears as a 10-fold dendrite. The grain distributions within the arm are complex and a single dendrite arm can contain up to four different orientations. Three types of twins, namely {100}, {001} and {201} twins, have been identified. A growth mechanism involving heteroepitaxial growth from a decagonal Al-Fe quasicrystalline seed is proposed to explain the formation of these specific 10-fold motifs.
Article
Chemistry, Physical
Ming Yang, Yibo Zhang, Jie Dong, Yan Huang, Zhichao Lu, Liang Wang, Xuerui Wei, Zhengdong Fu, Jinkui Zhao, Wenli Song, Wei Li, Yuntao Liu, Dong Ma
Summary: A multi-element microalloying strategy has been used to improve the microstructure and mechanical properties of CuZr-based bulk metallic glass composites. Microalloying effectively refines the CuZr phase and results in finely dispersed B2 crystallites embedded in the BMG matrix, leading to the formation of centimeter-sized BMGCs with good mechanical properties.
Article
Chemistry, Physical
Xuejie Zhu, Xuexi Zhang, Mingfang Qian, Ziyi Wang, Aibin Li, Zongning Chen, Muhammad Imran, Lin Geng
Summary: The homogeneous superelastic behavior in shape memory alloys (SMAs) is crucial for their functional and structural fatigue properties, as well as their stable elastocaloric effect (eCE). In this study, a Ti-22Nb-4Zr-2Ta plate was prepared with a strong recrystallized texture, resulting in a completely recoverable superelastic strain and narrow hysteresis. The observation of strain and temperature evolution revealed the importance of diffuse transformation and favorable texture in achieving mesoscopically homogeneous transformation and related elastocaloric effect.
Article
Chemistry, Physical
Mohammad Navazani, Sitarama Raju Kada, Daniel Fabijanic, Matthew Barnett
Summary: This study investigates the effect of Cu and Al addition on an alloy containing multiple principal elements. The results show that adding small amounts of Cu can improve the alloy's ductility and the hardness of the FCC phase can be predicted using a hybrid model. Unlike previous studies, the corrosion resistance of the alloy is not affected by Cu addition, indicating its potential for further development into a fine-grained stainless steel alloy.
Article
Chemistry, Physical
Fatemeh Azizian, Homam Naffakh-Moosavy, Fatemeh Bagheri
Summary: Novel biodegradable Zn-xCu-0.8Mn-0.4Ag alloys were prepared in this study, and the effects of Cu addition and hot extrusion process on microstructure, mechanical properties, and cytotoxicity of the alloys were investigated. The results showed that adding copper and performing a hot extrusion process can significantly improve the mechanical properties of the alloys, making them potential candidates for cardiovascular stents.
Article
Chemistry, Physical
Ivan A. Ditenberg, Denis A. Osipov, Ivan Smirnov, Konstantin V. Grinyaev
Summary: This study investigates the effect of high-temperature annealing on the structural-phase state and microhardness of Ni3Al samples obtained by spark plasma sintering after high-energy ball milling. The results show that certain annealing temperatures promote grain growth and high-density nucleation, leading to the formation of a fine-grained structural state. The study also analyzes the influence of annealing temperature on the strengthening mechanisms.