Review
Chemistry, Physical
Yu Chen, Zheng-Wei Dai, Jian-Zhong Jiang
Summary: Metallic glasses and high entropy alloys have shown remarkable features but also have issues. Recent efforts have been made to address these problems by introducing new concepts and mechanisms. High entropy metallic glasses, combining the advantages of both, have become a research focus.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
A. Lindsay Greer, Miguel B. Costa, Owain S. Houghton
Summary: There have been remarkable advances in the field of metallic glasses over the last 50 years, including an expanded range of compositions, improved production and shaping techniques, and the discovery of property combinations offering unparalleled performance. Ongoing research continues to provide fundamental insights into the structure and properties of glasses and liquids. This article focuses on the latest advances in understanding and the rapidly expanding prospects for applications.
Article
Engineering, Mechanical
Wei-Hui Lin, Chong-Min She, Chun-Yu Zhang, Paulo S. Branicio, Zhen - Dong Sha
Summary: The mechanical properties of cellular metallic glasses are influenced by the shape of their cellular structures. Random structures with uniform porosity show higher yield strength and Young's modulus compared to microlattice structures. The chiral structure displays the highest Young's modulus, while stochastic cellular structures exhibit higher energy absorption capacity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Physical
H. R. Zhang, S. Zhang, Z. L. Shi, F. L. Wang, C. Wei, M. Z. Ma, R. P. Liu
Summary: The cooling rate during the preparation of amorphous alloy has a significant impact on its microstructure and corrosion performance. However, the influence of different cooling rates caused by different molds on the corrosion properties and mechanical properties after corrosion of amorphous alloys is not clear. In this study, the cooling rate of Vit1 amorphous alloy was controlled by changing the mold material, and the corrosion behavior and mechanical properties before and after corrosion in different solutions were investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Materials Science, Multidisciplinary
Hengwei Luan, Keran Li, Lingxiang Shi, Wei Zhao, Hengtong Bu, Pan Gong, Ke-Fu Yao
Summary: High-entropy metallic glass (HEMG) is a new metallic material with unique glass formation behaviors and properties due to its high-entropy alloy-like composition and amorphous structure. This review provides an overview of the concept and development of HEMGs, discusses their glass-forming ability and thermal stability, and presents their mechanical, magnetic, catalytic, and other properties. It serves as a quick guideline for understanding the HEMG field.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Weiping Zeng, Yanhua Chen, Qiang Li, He Li, Baoxia Mu, Jiankang Ye, Chuntao Chang
Summary: The effects of Co content on the properties of Ni-based bulk metallic glasses were systematically investigated. It was found that increasing Co content improves glass forming ability, plastic strain, and corrosion resistance. These Ni-based bulk metallic glasses have excellent comprehensive performance and great potential for industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Nicolas Amigo, Simon Palominos, Felipe J. Valencia
Summary: This study employed machine learning models to predict the plastic properties in CuZr metallic glasses. Molecular dynamics simulations were conducted for 100 different samples, and statistical analysis was performed on 17 materials properties. Strong correlations were found between stoichiometry, temperature, structural, and elastic properties with plastic properties. Three regression models were used for prediction, and linear and Ridge regressions showed better performance with coefficients of determination above 80% for three plastic properties. Lasso regression had lower performance with coefficients of determination above 60% for two plastic properties. Overall, this work demonstrates that molecular dynamics simulations combined with machine learning models can provide a framework for predicting the plastic behavior of complex materials.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Arnold Meissner, Tim Voigtlaender, Saskia M. Meissner, Uta Kuehn, Susanne Schneider, Alexander Shnirman, Georg Weiss
Summary: The study rigorously tests the predictions of the standard tunneling model by measuring the low-temperature acoustic properties of bulk metallic glasses over a broad range of frequencies. The experiments confirm the importance of the interaction between tunneling states and conduction electrons in the superconducting state. Discrepancies with theoretical predictions can be explained by considering the linewidths of the dominating two-level atomic-tunneling systems, which may be influenced by dephasing caused by interaction with conduction electrons.
Article
Engineering, Multidisciplinary
LangTing Zhang, YaJuan Duan, YunJiang Wang, Yong Yang, JiChao Qiao
Summary: In this paper, it is demonstrated that cooling a BMG from the supercooled liquid region at laboratory rates can reverse the relaxation enthalpy lost during the preceding structural relaxation. Increasing the cooling rate enhances atomic mobility and dynamic mechanical relaxation intensity. This rejuvenation methodology facilitates tailoring the mechanical properties of BMGs and provides a comprehensive understanding of the rejuvenation mechanism.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Tianhao Liu, Limin Lai, Siming Xiao, Meifang Tang, Hongju Zhang, Shengfeng Guo
Summary: In this study, a new ternary system of Fe-W-B BMGs with ultrahigh thermal stabilities and hardness was successfully developed, showing promising applications in extreme service environment. The thermal properties and simple chemical components of Fe-W-B BMGs make them model materials for understanding the glass formation mechanism of Fe-based BMGs.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
A. H. Cai, G. Zhou, P. W. Li, D. W. Ding, Q. An, G. J. Zhou, Q. Yang, Y. P. Lin, H. Mao
Summary: The relationship between microstructure and mechanical property of three Zr-based bulk metallic glasses (BMGs) was investigated. The results show that the content of CuZr2-type phase increases but that of Zr6Al2Ni-type phase decreases with increasing Zr content. The plastic flow stress and strain decrease while the plasticity increases with increasing fraction of CuZr2-type cluster, which is named as geometrically unfavorable motifs (GUMs). The fitting parameters from cumulative probability statistics provide valuable clues for investigating the plastic flow and plasticity of the BMGs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
C. Poltronieri, A. Brognara, F. Bignoli, S. Evertz, P. Djemia, D. Faurie, F. Challali, C. H. Li, L. Belliard, G. Dehm, J. P. Best, M. Ghidelli
Summary: In this work, the relationship between atomic structure, mechanical properties, and thermal stability of ZrCuAlx thin film metallic glasses (TFMGs) was investigated. The addition of Al resulted in changes in average interatomic distances and mechanical response. Higher Al content reduced damage tolerance but increased thermal stability. This study provides guidelines for the design of ZrCuAlx TFMGs with tailored mechanical properties and thermal stability.
Review
Chemistry, Physical
S. Thanka Rajan, A. Arockiarajan
Summary: Amorphous thin film metallic glasses (TFMGs) have generated significant interest for their potential in practical applications and scientific importance in the biomedical field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
C. Y. Liu, Y. X. Zhang, C. Y. Zhang, G. Yuan, J. Kang, Z. L. Li, R. D. K. Misra
Summary: The study investigates the impact of Ni content on Fe-based bulk metallic glasses, finding that moderate Ni addition can enhance glass forming ability and soft magnetic properties, while excessive Ni leads to performance deterioration. This research highlights the potential of current Fe-based BMGs for both structural and magnetic functional applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Amir Hossein Taghvaei, Razieh Farajollahi, Jozef Bednarcik, Juergen Eckert, Majid Pahlevani
Summary: Co66-xFexHf6.5B27.5 (x = 0, 10, 15, 20) metallic glasses (MGs) were prepared by melt-spinning, and a comprehensive study on their atomic structure, thermal behavior, crystallization kinetics, and magnetic properties was conducted. The addition of Fe significantly improved the thermal stability of the glasses and increased the width of the supercooled liquid region. Analysis of the structure factor and reduced-pair distribution function revealed changes in short-range ordering and an increase in atomic packing density with Fe addition. The Fe alloyed MGs exhibited higher magnetic properties and longer incubation time before crystallization compared to Fe-free MGs. The Co46Fe20Hf6.5B27.5 MG showed attractive features for future applications in power electronics and electric machines.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
J. Y. C. Fang, W. H. Liu, J. H. Luan, T. Yang, Y. Wu, M. W. Fu, Z. B. Jiao
Summary: This study systematically investigates the effects of aging temperature, aging time, and grain size on the CP and DP behaviors of L1(2)-strengthened HEAs. The results show that low temperatures favor the DP reaction, while high temperatures facilitate the CP reaction. At intermediate temperatures, both the CP and DP occur simultaneously and compete with each other. Grain size refinement can promote the DP reaction and result in a DP-dominant microstructure.
Article
Nanoscience & Nanotechnology
Yaojia Ren, Bo Han, Hong Wu, Jianchuan Wang, Bin Liu, Bingqiang Wei, Zengbao Jiao, Ian Baker
Summary: For the first time, the formation of nanotwins and 9R phase were observed in ultrafine-grained Ti-5wt.%Cu alloys with an average lath width of 223 nm produced by laser powder bed fusion. The 9R phase originated from lath boundaries with Cu segregation and terminated at the other boundary of the lath. Deformation caused curvature of the lath boundaries and an increase in lath width, promoting the transition of the central 9R phase to nanotwins. This work provides a new route for in situ production of nanotwinned Ti by the laser melting-induced segregation of Cu.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Guhui Gao, Miao Liu, Xiaolu Gui, Jie Hu, Junhua Luan, Zengbao Jiao, Xi Wang, Bingzhe Bai, Zhigang Yang
Summary: The failures of conventional pearlitic rail steels are influenced by the formation of hard and brittle white and brown etching layers (WEL and BEL) on the rail raceway during service. This study reports the formation of a unique multilayer heterostructured WEL/BEL in a field-tested bainitic rail. The WEL is composed of fine-grained martensite or ferrite and retained austenite, while the BEL contains nanocrystalline martensite or ferrite, retained austenite, cementite, and oxide or O-rich particles.
Article
Materials Science, Multidisciplinary
Hao Jie Kong, Tao Yang, Rong Chen, Zengbao Jiao, Tianlong Zhang, Boxuan Cao, Junhua Luan, Shaofei Liu, Anding Wang, Jacob Chih-Ching Huang, Xun-Li Wang, Chain Tsuan Liu
Summary: High-performance, low-cost structural materials with nanoscale precipitations are essential for advanced industry systems. Traditional nucleation mechanisms have limitations in achieving fine dispersion of nanoscale precipitates. However, a revolutionary approach of ultra-strong iron-based alloys has successfully resolved these issues through non-classical nanoscale precipitations and multi-elemental partitioning. This strategy allows for control of nanoscale precipitates with low solute supersaturation, resulting in enhanced strength and ductility, superior fabricability, and post-weld properties.
Article
Engineering, Multidisciplinary
Lu Yang, Chengxia Wei, Dingshan Liang, Feilong Jiang, Zhuo Cheng, Junhua Luan, Zengbao Jiao, Fuzeng Ren
Summary: In this study, the friction and wear behaviors of CoCrNi2(Al0.2Nb0.2) alloy with high-density coherent L1(2) nanoprecipitates during sliding at room and elevated temperatures were systematically investigated. The results showed that the alloy exhibited low wear rate and excellent wear resistance at room temperature, attributed to the precipitation strengthening and dynamic workhardening. At elevated temperature, the reduced wear rates and coefficients of friction were associated with the formation of glaze layer and high resistance to thermal softening. This work provides significant insight into the sliding-induced microstructure evolution and deformation mechanism of L1(2)-strengthened high-entropy alloys during sliding wear.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xingdu Fan, Tao Zhang, Weiming Yang, Junhua Luan, Zengbao Jiao, Hui Li
Summary: The Fe81.3Si4B13-xPxCu1.7 soft magnetic alloys with high Cu and proper P elements addition were synthesized to ensure the amorphous forming ability (AFA) and expand the crystallization window (CW). It was found that an atomic ratio of P/Cu around 3 is advantageous for AFA, and a small amount of P addition promotes the precipitation of alpha-Fe grains. High Cu concentration expands the annealing temperature (Ta) window, while proper P addition enlarges the annealing time (ta) window. The successful synthesis of the Fe81.3Si4B8P5Cu1.7 soft magnetic alloy with a large Ta window of up to 130 degrees C and ta window of 90 min is a breakthrough for nanocrystalline alloys with high saturation magnetization.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Shidong Wang, Jinhua Wang, Yong Yang, Penghui Wang, Shubo Zhang, Junpeng Liu, Zongchang Guo, Hengwei Luan, Chi Zhang, Zengbao Jiao, Zhigang Yang, Gang Sha, Hao Chen
Summary: By tuning the phase stability of interstitial chemically complex alloys (iCCAs), a lath-martensite matrix with a body-centered cubic (bcc) structure was achieved, leading to ultrahigh strength. This alloy design strategy combines the wide chemical composition space and ultrahigh strength of bcc-martensite in steels, providing a new approach for developing high-performance materials.
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
Tong Li, Tianwei Liu, Shiteng Zhao, Yan Chen, Junhua Luan, Zengbao Jiao, Robert O. Ritchie, Lanhong Dai
Summary: This article presents a method to enhance the strength of tungsten-based high-entropy alloys by stepwise controllable coherent nanoprecipitations (SCCPs), thus overcoming the trade-off between strength and ductility. The coherent interfaces of SCCPs facilitate dislocation transmission and relieve stress concentrations, resulting in an alloy with ultrahigh strength and ductility.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xinghao Wei, Lixin Sun, Zhongwu Zhang, Yang Zhang, Junhua Luan, Zengbao Jiao, Chain Tsuan Liu, Gang Zhao
Summary: In this study, the effects of aging treatments at 500 and 550 degrees C on the impact performance of a Cu precipitation-strengthened steel at a low temperature of -80 degrees C were investigated. The main factor controlling the low-temperature toughness was found to be solute segregation at lath boundaries. Excellent impact performance of -180 J at -80 degrees C, along with high yield strength of -1050 MPa and total elongation of 19%, can be achieved by controlling the segregation of solute elements, specifically Mo and Mn, at the lath boundaries. The evolution of matrix and precipitates during aging treatments and the strengthening and toughening mechanisms were also discussed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
X. F. Gong, Z. H. Gao, L. P. Nie, S. Qiu, Q. Yu, H. Wu, G. P. Zheng, Z. B. Jiao
Summary: This study systematically investigated the effects of 3d, 4d, and 5d transition elements on the phase stability, mechanical properties, and deformation behavior of L12 Co-Ti-based alloys using first-principles calculations. The results showed that certain transition elements tend to occupy specific sites, reducing the structural stability of the alloys. The analysis also revealed that the strengthening of the alloys is attributed to the strong covalent character of the Co-M bonds. The study provides insights into the fundamental understanding of multicomponent L12 compounds and offers guidelines for designing superior Co-based superalloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Multidisciplinary
Chao Hou, Hao Lu, Zhi Zhao, Xintao Huang, Tielong Han, Junhua Luan, Zengbao Jiao, Xiaoyan Song, Zuoren Nie
Summary: The challenge of fabricating nanostructured W-Cu composites has been solved by modulated phase separation. By using intermediary Al, a hierarchically nanostructured W-Cu composite with stable interfaces and high mechanical performance has been achieved.
Article
Materials Science, Multidisciplinary
Wenhao Mao, Lu Yang, Feilong Jiang, Jiangping He, Junhua Luan, Zengbao Jiao, Fuzeng Ren
Summary: Oxide-dispersion-strengthened CoCrNi alloys were synthesized through in situ oxidation and non-in-situ oxidation methods, resulting in Y-ODS and Y2O3-ODS alloys, respectively. Characterizations using TEM and APT revealed that both alloys consisted of an ultrafine-grained fcc matrix, nanoscale Y-Ti-O precipitates, and a small number of (Cr0.75Ti0.25)2O3 oxides. However, the Y-Ti-O precipitates in the two alloys exhibited different phase and microstructure, with Y2TiO5 and Y2Ti2O7 nanoparticles in Y2O3-ODS and Y-ODS alloys, respectively. The Y-ODS alloy displayed an ultrahigh yield strength of 1660 MPa, 320 MPa higher than the Y2O3-ODS alloy, while maintaining the same ductility. Quantitative analysis revealed that the presence of coherent Y2Ti2O7 nanoprecipitates in the Y-ODS alloy contributed to this significant difference in strength. This study provides valuable insights into the design of ODS high/medium-entropy alloys via in situ oxidation during mechanical alloying and consolidation.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
B. C. Zhou, S. F. Liu, H. H. Wu, J. H. Luan, J. M. Guo, T. Yang, Z. B. Jiao
Summary: The effects of Ni and Al contents and ratios on the precipitation, mechanical properties, and deformation behavior of NiAl-strengthened steels were systematically studied. The results show that increasing Ni and Al contents promotes the formation of discontinuous precipitation. The steels with different Ni and Al contents and ratios exhibit high tensile strengths but significantly different ductilities and fracture behaviors. The size of precipitates affects the work hardening capability, with small precipitates enhancing and large precipitates reducing it. Increasing the Ni/Al ratio improves the ductility and fracture behavior of the steels.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
J. X. Hou, J. Y. Zhang, J. X. Zhang, J. H. Luan, Y. X. Wang, B. X. Cao, Y. L. Zhao, Z. B. Jiao, X. J. Liu, W. W. Song, P. K. Liaw, T. Yang
Summary: The precipitation morphologies, coarsening kinetics, elemental partitioning behaviors, grain structures, and tensile properties of L12-strengthened Ni39.9Co20Fe15Cr15Al6Ti4-xNbxB0.1 (x = 0 at.%, 2 at.%, and 4 at.%) high-entropy alloys were investigated. Substituting Ti with Nb resulted in a transition from spheroidal to cuboidal precipitates, increased coarsening kinetics, and phase decomposition at 800°C. Excessive Nb addition led to grain boundary precipitation and phase decomposition from L12 to lamellar-structured D019 phase. Partial substitution of Ti with Nb resulted in a chemically complex and thermally stable L12 phase, ensuring stable phase structure and clean grain boundaries, leading to excellent high-temperature mechanical properties at 700°C.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xiaohua Chen, Mi Zhang, Jin Zhu, Juan Wang, Zengbao Jiao, Yong Li
Summary: In this paper, a cathode host for Li-S batteries, Ce-MOF-808@S/PPy composite, was synthesized and tested for its electrochemical performance. The results showed that the composite exhibited improved electrochemical properties, attributed to its unique structure and high specific surface area.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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.
