Article
Chemistry, Physical
Stefan Michalik, Zuzana Molcanova, Michaela Sulikova, Katarina Kusnirova, Pal Jovari, Jacques Darpentigny, Karel Saksl
Summary: The Mg-Zn-Ca system was investigated for its glass-forming ability by fabricating ribbon specimens using melt-spinning technique with a concentration line of 7 at.% calcium. The samples were characterized to determine their mass density, hardness, elastic modulus, and crystallisation temperatures. Pair distribution functions obtained by HEXRD and ND measurements described the amorphous structure, revealing contributions of Mg-Mg, Mg-Zn, and Zn-Zn pairs. In situ HEXRD showed the transformation process from amorphous to crystalline structure for Mg60Zn33Ca7 and Mg50Zn43Ca7, proposing the formation of intermetallic compounds IM1 and IM3 as well as hcp-Mg phase in multiple crystallisation events.
Article
Chemistry, Physical
Ming Liu, Xiuzhu Han, Rui Zhao, Tong Lu, Wen Dong, Chaoqun Liao, Qi Zhang, Yonghao Sun, Yanzhi Dong, Jian Song, Wei Yao, Shaofan Zhao, Haiyang Bai, Weihua Wang
Summary: This study assessed the thermal stability of metallic glasses (MGs) under simulated space conditions and proposed rules for selecting MGs with better thermal stability for future space applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Limin Lai, Tianhao Liu, Xinghong Cai, Min Wang, Shengbiao Zhang, Wen Chen, Shengfeng Guo
Summary: The study introduces a series of low-cost refractory Mo-Co-B BMGs with enhanced GFA and high thermal stability, exhibiting exceptional hardness and Young's modulus.
SCRIPTA MATERIALIA
(2021)
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
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
Materials Science, Multidisciplinary
Baoshuang Shang, Weihua Wang, Alan Lindsay Greer, Pengfei Guan
Summary: Thermal cycling in metallic glasses can induce rejuvenation and relaxation, gradually erasing the initial glass structure through local atomic rearrangements. Molecular dynamics simulations reproduce physically observed effects, suggesting potential for optimizing properties of metallic glasses through thermal cycling.
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
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)
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, Ceramics
Gokhan Kilic, Shams A. M. Issa, Erkan Ilik, O. Kilicoglu, U. Gokhan Issever, R. El-Mallawany, Bashar Issa, H. O. Tekin
Summary: The direct effect of samarium (III) oxide reinforcement on physical, thermal, optical, structural and nuclear radiation attenuation properties of novel borotellurite glasses was investigated through experimental and numerical studies. The results showed that TBVS1.5 sample with the highest Sm2O3 additive exhibited the lowest transmittance and highest absorbance, indicating superior nuclear radiation shielding properties.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
A. Khmich, A. Hassani, K. Sbiaai, A. Hasnaoui
Summary: Metallic glasses exhibit high mechanical performance but are usually brittle. Reinforcement of the metallic glass matrix to form composite materials is necessary for improved ductility and toughness. Molecular dynamics simulations can provide insights into the effects of adding Ta and W monocrystalline fibers on the mechanical properties of metallic glasses.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
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.
Article
Physics, Applied
Y. Song, Y. Teng, Z. D. Sha
Summary: It has been found that hydrogen microalloying can cause a transition in the failure mechanism of metallic glasses from shear banding to cracking. A theoretical model based on the concept of energetic model is proposed to rationalize this transition. Cracking behavior becomes more significant with increasing hydrogen content, advancing our understanding of the failure mechanism in hydrogen-alloyed metallic glasses.
JOURNAL OF APPLIED PHYSICS
(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
Nanoscience & Nanotechnology
Ziyun Long, Pingjun Tao, Liwei Kong, Guotai Wang, Shengkai Huang, Shenghua Wen, Huajie He, Zhenghua Huang, Xuguang Zhu, Xi Xu, Huanhuan Deng, Yuanzheng Yang
Summary: This article investigates the effects of cryogenic thermal cycling on the microstructure and plasticity of Zr60Cu20Al10Ni10 bulk metallic glass. The heterogeneity of the internal structure of the cryogenic thermal cycling-treated samples increases the energy state and introduces more flow defects, resulting in an improved room-temperature plasticity of Zr-based BMGs. This phenomenon indicates a more frequent generation of shear transition zones and shear band movement within them.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Y. T. Cheng, Q. Hao, J. C. Qiao, D. Crespo, E. Pineda, J. M. Pelletier
Summary: The dynamic mechanical behavior and physical aging of Zr50-xCu34Ag8Al8Pdx (x = 0 and 2) bulk metallic glasses were studied in this research. The addition of Pd was found to slightly increase the dynamic inhomogeneity and reduce the defect concentration, ultimately affecting the relaxation time. The analysis also showed that the shape of the relaxation time distribution was not significantly altered.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Hezhi Zhang, Honggang Sun, Shaopeng Pan, Daniel Sopu, Chuanxiao Peng, Kang Zhao, Kaikai Song, Shengzhong Yuan, Jichao Qiao, Li Wang, Juergen Eckert
Summary: This study investigated the origin of structural heterogeneity in metallic glasses by simulating liquid structures upon cooling of Zr-Co-Al alloys. The findings suggest that chemical structural heterogeneity plays a crucial role in the formation of Zr65Co30Al5 MG, which displays increased ductility with more pronounced chemical structural heterogeneity. Bond pair analysis revealed the prominence of five-fold symmetric bond pairs in both MGs, with Zr65Co30Al5 MG exhibiting noticeable six-fold symmetric stability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
M. N. Liu, Q. Hao, J. Dong, B. A. Sun, S. D. Feng, D. Crespo, J. C. Qiao
Summary: It was found that the beta relaxation becomes more pronounced with the increase of copper in binary metallic glasses. However, the beta relaxation of CuZr or CuTi binary metallic glasses is much more modest compared to other metallic glasses.
Article
Chemistry, Physical
Mi Zhao, Yuman Shao, Weijie Zheng, Yonghua Luo, Jichao Qiao, Shusen Wu, Youwei Yan, Wei Guo
Summary: A porous B2-NiTi compound with fine pore size and homogeneous pore distribution has been successfully fabricated, showing excellent damping capacity and mechanical properties. Control of pore size and porosity allows for tuning of material performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Y. J. Duan, J. C. Qiao, T. Wada, H. Kato, Y. J. Wang, E. Pineda, D. Crespo
Summary: Dynamic mechanical analysis was performed on two metallic glasses with distinct beta relaxation features. The presence of free-volume zones and inelastic deformation behavior led to significant mechanical hysteresis loops in dynamic cyclic loadings, which can be described using a viscoelastic model. Annealing below the glass transition temperature reduced the concentration of free-volume zones, providing insights into improving the mechanical properties of high entropy metallic glasses.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
A. S. Makarov, G. Afonin, R. A. Konchakov, J. C. Qiao, A. S. Aronin, N. P. Kobelev, V. A. Khonik
Summary: This study conducted parallel measurements of enthalpy and high-frequency shear modulus changes during structural relaxation of five bulk metallic glasses. The analysis revealed a one-to-one correlation between the change in molar enthalpy and the alteration in the calculated number of defects based on Interstitialcy theory. The defect formation enthalpy derived from this correlation aligns well with the accepted quantity in the Interstitialcy theory.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Physics, Condensed Matter
A. S. Makarov, J. C. Qiao, N. P. Kobelev, A. S. Aronin, V. A. Khonik
Summary: This study focuses on the fragility of supercooled liquids, demonstrating the relationship between fragility and high-frequency shear modulus. The heat capacity jump is also found to be related to fragility and shear modulus relaxation. The results suggest that the evolution of interstitial-type defects frozen-in during glass production mediates the connection between fragility, heat capacity jump, and high-frequency shear modulus in the supercooled liquid state.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
M. N. Liu, Q. Hao, J. C. Qiao
Summary: The dynamic mechanical relaxation behavior of two different bulk metallic glasses was examined, showing distinct characteristics in the relaxation process, where physical aging resulted in a decrease in beta relaxation intensity and an increase in relaxation time. This behavior was found to be linearly correlated, similar to that observed in organic glasses, suggesting a potential common mechanism underlying relaxation processes in different types of glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Physics, Condensed Matter
A. S. Makarov, G. Afonin, J. C. Qiao, A. M. Glezer, N. P. Kobelev, V. A. Khonik
Summary: By performing calorimetric and shear modulus measurements on bulk metallic glasses, this study demonstrates the consistency between the calorimetric determination and calculation of excess thermodynamic potentials, with a focus on the physical origin of these potentials being related to a system of interstitial-type defects frozen-in from the liquid state. The estimates of defect formation enthalpy and entropy indicate that the enthalpy scales with the shear modulus while the entropy is significantly large, aligning with the basic assumptions of the interstitialcy theory.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Y. J. Duan, J. C. Qiao, T. Wada, H. Kato, E. Pineda, D. Crespo, Yun-Jiang Wang
Summary: The viscoelastic properties of Pd20Pt20Cu20Ni20P20 high-entropy metallic glass were investigated using dynamic mechanical spectroscopy and stress relaxation, with a linear relaxation model developed to describe the stress relaxation process. The activation energy spectra at various temperatures revealed changes in deformation units during stress relaxation, influenced by the interplay between stress and temperature. This study decomposed the hierarchical dynamics due to structural heterogeneity, allowing for a better understanding of viscoelastic deformation in high-entropy metallic glasses.
MECHANICS OF MATERIALS
(2021)
Article
Physics, Multidisciplinary
LangTing Zhang, YaJuan Duan, Daniel Crespo, Eloi Pineda, YunJiang Wang, Jean-Marc Pelletier, JiChao Qiao
Summary: Dynamic mechanical relaxation is a fundamental tool for understanding the mechanical and physical properties of viscoelastic materials like glasses. The high-entropy bulk metallic glass exhibits a distinct beta-relaxation feature. Anelastic strain is contributed by the stochastic activation of shear transformation zones (STZs), and interactions between STZs induce viscous-plastic strain under certain conditions.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Materials Science, Multidisciplinary
Guo-Jian Lyu, Ji-Chao Qiao, Yao Yao, Yun-Jiang Wang, Julien Morthomas, Claudio Fusco, David Rodney
Summary: Different microstructures, such as nanoglasses, crystal-glass nanolaminates, and glasses with spherical crystalline inclusions, can affect the structural relaxations and mechanical energy dissipation of metallic glasses. The fraction and spatial homogeneity of hard icosahedral environments matter in a fully glassy system, while the storage modulus and loss moduli are determined by the microstructure and loading conditions. Atomistic processes leading to these evolutions are discussed, with remaining open questions highlighted.
Article
Chemistry, Physical
Xiao Cui, Ji Chao Qiao, Yu Bai Ma, Jin Jing Li, Xiao Jun Meng, Fang Qiu Zu
Summary: The study investigated the changes in La-based BMG during 8 years of natural aging, revealing that natural aging leads to atomic structure relaxation, affecting the mechanical properties of the material.
Article
Materials Science, Multidisciplinary
Z. R. Xu, J. C. Qiao, J. Wang, E. Pineda, D. Crespo
Summary: The evolution of deformation and relaxation behaviors of a prototypical Cu46Zr46Al8 metallic glass under physical aging and cyclic loading was explored. A decrease in local defects and recoverable deformation units within the metallic glass were observed with increasing annealing time and cyclic numbers. The suppressed relaxation process can be gradually alleviated with increasing resuming time between two consecutive cycles, indicating a notable discrepancy between thermal treatment and mechanical treatment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Y. J. Duan, L. T. Zhang, T. Wada, H. Kato, E. Pineda, D. Crespo, J. M. Pelletier, J. C. Qiao
Summary: The anelastic deformation behavior of Pd 20 Pt 20 Cu 20 Ni 20 P 20 high-entropy metallic glass was studied through monitoring the stress relaxation and recovery processes. A constitutive model was proposed to describe the stress relaxation process, considering a hierarchy of relaxation processes related to the structural heterogeneity. The crossover from stochastic activation to percolation of flow defects was observed during the stress relaxation process. The recovery time-spectra revealed the evolution of flow defects in the metallic glass.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(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.
