Article
Chemistry, Physical
Y. Long, Q. P. Cao, X. L. Wang, T. D. Xu, Y. Su, X. D. Wang, S. Q. Ding, D. X. Zhang, J. Z. Jiang
Summary: This study investigated the influence of composition tuning on the glass forming ability, mechanical properties, and atomic structure of Zr-Co-Al bulk metallic glasses. Experimental and theoretical results showed that the glass forming ability was enhanced when composition approached Zr56Co28Al16, and a ductile-to-brittleness transition was induced by minor substitution of larger-sized atoms by smaller-sized atoms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
W. H. Zhou, F. H. Duan, Y. H. Meng, C. C. Zheng, H. M. Chen, A. G. Huang, Y. X. Wang, Y. Li
Summary: The study systematically investigated the evolution of microstructure and mechanical properties of Zr-based bulk metallic glasses with varying oxygen content. Results showed that with increasing oxygen content, compressive plasticity decreased slightly before plunging drastically, revealing a threshold oxygen content level for ductile-brittle transition at 3500 at. ppm. The embrittlement at high oxygen content was closely related to changes in microstructure.
Article
Materials Science, Multidisciplinary
Xiangkui Liu, Jian Kong, Xinxiang Song, Shuai Feng, Qipeng Wang, Yang Yang, Tianchi Wang
Summary: The size dependence of ductile to brittle transition in Zr-based metallic glasses was investigated through small punch test, revealing a significant difference in behavior between thin and thick samples. Two critical deformation factors, alpha(c1) and alpha(c2), were identified at sample thicknesses of 200 and 500 mm, triggering the initiation of circumferential and radial shear bands respectively. The interaction of multiple shear bands significantly enhances the ductility of samples with alpha >= alpha(c1).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yan Lu, Wei-Zhong Han
Summary: Pre-deformation is a useful technique to adjust the ductile-to-brittle transition temperature of body-centered cubic metals. However, the mechanism behind the reduction in DBT temperature is still not well understood due to the complex microstructural changes during pre-straining.
Article
Mechanics
Fujun Jiang, Min Yu, Xianghua Peng, P. H. Wen
Summary: In this paper, a theoretical model is established to investigate the effect of nanoscale amorphization on the dislocation emission from the tip of a collinear crack in nanocrystalline bimaterials. The analysis shows that the critical stress intensity factor of the interfacial crack tip corresponding to dislocation emission is influenced by factors such as the dislocation emission angle, nanoscale amorphization, and relative shear modulus. Appropriate material selection can reduce the critical stress intensity factor and improve the toughness of nanocrystalline bimaterials.
Article
Chemistry, Physical
Lei Liu, Kenji Shinozaki
Summary: In this study, Ni nanoparticles were dispersed in SiO2 glass to investigate the effect of particle size on the ductility of glass. It was found that larger Ni nanoparticles significantly enhanced the fracture toughness of glass and resulted in ductile fracture, while smaller Ni nanoparticles led to brittle fracture. Despite their small volume fraction, the dispersion of Ni nanoparticles in the glass matrix significantly increased the fracture surface energy. These findings suggest that dispersing larger Ni nanoparticles in glass can effectively improve its ductility, providing a cost-effective method for enhancing the fracture toughness of glass.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Engineering, Manufacturing
Tao Zhang, Feng Jiang, Hui Huang, Jing Lu, Yueqin Wu, Zhengyi Jiang, Xipeng Xu
Summary: This paper reviews the brittle-ductile transition (BDT) in extreme manufacturing, analyzes the factors affecting it, and discusses the mechanisms behind it. It suggests that the competition between plastic deformation and crack propagation determines the transition between brittleness and ductility. The brittleness or ductility of the machined material should be regulated by deformation scale, deformation temperature, and machining speed to benefit specific manufacturing processes.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Jingui Yu, Chunliu Han, Faping Yu, Chao Dong, Gang Zhao, Caiyun Gong, Mingchao Wang, Qiaoxin Zhang
Summary: Molecular dynamics simulation was employed to investigate the tension-compression asymmetry and brittle-ductile transition of Ni-Al metallic glass. Cooling rate had negligible influence on tension-compression asymmetry, while mechanical properties depended on the composition. Higher content of Al element resulted in poor mechanical properties due to lower content of icosahedral clusters. The tension-compression asymmetry was more pronounced with higher aspect ratio, which positively correlated with the content of icosahedral clusters. Cooling rate and composition had little effect on brittle-ductile transition compared to aspect ratio. Icosahedral clusters transformed from low to high symmetry under tensile and compressive loads, accompanied by irreversible atomic rearrangements near shear bands, leading to limited plasticity. The rejuvenation rate of icosahedral clusters was faster in metallic glasses with higher aspect ratio, resulting in brittle fracture, which explained the mechanism of brittle-ductile transition behavior in metallic glasses.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Ceramics
Qi Liu, Mingjun Chen, Zhirong Liao, Junyuan Feng, Dongdong Xu, Jian Cheng
Summary: This study investigates the specific impact of temperature on the deformation behaviors of brittle KDP crystal through nano indentation/scratch methods. The results show that increasing the temperature significantly decreases the hardness and Elastic modulus of KDP crystal, while greatly increasing the fracture toughness, indicating a higher ability of ductile deformation at elevated temperature. Additionally, the scratch length in ductile removal process is extended more than 4 times by increasing temperature, and the quantity and size of brittle features show a reducing trend with temperature increase.
CERAMICS INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Melodie E. French, Wenlu Zhu, Xiaohui Xiao, Brian Evans, David J. Prior
Summary: This study reports the strength and deformation behavior of Solnhofen limestone during its transition from brittle to ductile. The results show that the combined effects of water and temperature have complex influences on the deformation and strength of the limestone. At elevated temperatures, water-saturated limestone exhibits weakening in both the brittle and ductile fields. Moreover, the concurrent effects of pore water and temperature significantly reduce the pressure of the brittle to ductile transition. These findings are important for understanding the behavior of limestone in geological processes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Paul K. Byrne, Bradford J. Foley, Marie E. S. Violay, Michael J. Heap, Sami Mikhail
Summary: The thickness of the brittle lithosphere on a planetary body is influenced by the planet's surface temperature, with smaller, older planets generally having thicker lithospheres and larger, younger planets having thinner lithospheres. Some combinations of planetary and stellar parameters can result in worlds with exceedingly thin brittle layers, which may have little elevated topography and limited volatile cycling and weathering. These predictions can be tested through future telescopic observations of known extrasolar planets.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Materials Science, Ceramics
H. D. Yang, L. B. Zhang, J. S. Zhang, H. H. Tang, S. H. Chen
Summary: Understanding the effects of cooling rate and sample size on the plastic deformation behavior of metallic glasses is crucial. This study found that increasing the cooling rate significantly enhances the plasticity of metallic glasses, while decreasing the sample size only moderately improves the plasticity. The cooling rate has a greater influence on the plastic deformation behavior than the size effect, and the size effect is also dependent on the cooling rate.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Y. Tan, Y. W. Wang, H. W. Cheng, X. W. Cheng
Summary: The fracture behavior of a Zr-based bulk metallic glass under different loading conditions was investigated, revealing the evolution of shear bands and voids and their impact on the fracture mode. The study showed the transition from shear banding to void coalescence under planar impact loading due to the increase in decohesion strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Tong Wu, Xiaofei Fu, Bo Liu, Haixue Wang, Zhaohan Xie, Zhejun Pan
Summary: In this study, mudstone and gypsum samples were collected and a series of experiments were conducted to investigate the permeability evolution under different stress conditions. The results showed that the initial permeability of mudstone was higher than gypsum, and the permeability increased significantly under stress for mudstone compared to gypsum. Different failure modes of brittle deformation for mudstone and ductile deformation for gypsum led to the differences in permeability evolution between the two types of caprocks.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Yan Jiang, Yirong Liu, Min Chen, Xuefeng Zhang, Longfei Zeng, Zhiqiang Jiang, Jiaping Han, Xuan Xiao
Summary: By reducing the Zr concentration, the mechanical properties of the equimolar TiVNbZr alloy at high temperatures can be improved. The fabricated Zrx alloys showed higher strength than TiVNbZr at temperatures above 800 degrees C, but exhibited some special mechanical responses at 800 degrees C, including cracks along grain boundaries and brittle fracture. Local stress concentration and phase transformation were responsible for these responses.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
W. W. Li, H. Y. Song, J. L. Dai, J. Y. Wang, M. R. An, Y. L. Li
Summary: The study shows that introducing shape memory alloy (SMA) can improve the mechanical properties of metallic glass (MG). The martensitic transformation in the SMA phase limits shear bands propagation, avoids instability, and induces plastic strain strengthening. Adjusting the volume fraction of SMA can significantly improve the plasticity and strength of the nanomultilayers.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Engineering, Manufacturing
Chi Chen, Yazhou Guo, Jun Liu, Jingyu Yu, Yulong Li, Xiaochuan Liu, Fahad Raza
Summary: This paper studied the impact load and damage mechanism of a 4.78kg quad rotor UAV through numerical modeling and experimental validation. The study found that the speed, heading angle, and pitch angle of the UAV have a significant impact on the collision outcome.
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2022)
Article
Engineering, Mechanical
Hongsheng Yang, Yulong Li, Fenghua Zhou
Summary: This study investigates stress wave generation and propagation in a semi-infinite Rayleigh-Love rod due to impact using analytical methods. Three specific problems were solved and explicit analytical solutions were obtained which agree well with numerical simulations. The hyper-viscoelasticity property of a Rayleigh-Love rod is highlighted and dispersive features of stress wave generation and propagation are demonstrated through examples.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Materials Science, Composites
Xianghao Meng, Jin Li, Hao Cui, Chao Zhang, Zhongbin Tang, Yulong Li
Summary: The shear failure behavior of CF/ZnO NW/epoxy resin hierarchical composites and its dependency on strain rate were investigated in this study. The results showed a positive strain rate dependency of the interlaminar shear strength (ILSS). Additionally, longer and denser ZnO NWs were found to provide better enhancement effects.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Wendi Shi, Siyu Lu, Jianghua Shen, Biao Chen, Junko Umeda, Qiuming Wei, Katsuyoshi Kondoh, Yulong Li
Summary: The study found that increasing oxygen content in commercial purity titanium can lead to adiabatic shear failure, while the texture or grain orientation of the material has a profound influence on the formation of ASB. Microstructural examinations of high oxygen CP-Ti showed the formation of uniform and equi-axed nano-grains within the ASB.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Peng Gao, Zihao Ma, Ji Gu, Song Ni, Tao Suo, Yulong Li, Min Song, Yiu-Wing Mai, Xiaozhou Liao
Summary: In this study, a bulk CrCoNi medium-entropy alloy was found to exhibit exceptional combination of high strength and excellent ductility under high strain rates and low temperatures. This was mainly attributed to profuse deformation twinning and other factors contributing to grain refinement, work hardening, and excellent tensile strain.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Ceramics
Minjie Wang, Jianghua Shen, Biao Chen, Yunfei Wang, Junko Umeda, Katsuyoshi Kondoh, Yulong Li
Summary: The study showed that the strengthening capability of CNTs/Al decreased compared to PBM Al with increasing temperature and decreasing loading rate. However, CNTs played a crucial role in hindering dislocation movement and stabilizing the microstructure, leading to increased strength in Al-based MMCs. Experimental results also revealed improved strain rate sensitivity and reduced activation volume in CNTs-reinforced Al composites compared to pure aluminum.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
Rui He, Yidi Gao, Longfei Cheng, Hao Cui, Yulong Li
Summary: This paper characterizes the dynamic fracture toughness of laminated composites in fibre kinking mode and its evolution with crack growth at high loading rates. The study found that the fracture toughness remains constant at the initiation of fibre kinking damage, but decreases noticeably during the kinking band growth stage at higher loading rates. Two different types of damage evolution were observed depending on the amount of delamination involved.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Bin Jiang, Muhammad Atif, Yi Ding, Yazhou Guo, Yulong Li
Summary: Understanding the dynamic tensile behavior of glasses is crucial for designing impact-resistant transparent structures. This study investigated the effects of loading rate, specimen size, and stress wave on the dynamic tensile behavior of brittle glass.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
Hongsheng Yang, Fenghua Zhou, Yulong Li, Yuxuan Zheng
Summary: This paper investigates the Taylor impact problem of an elastic rod with finite length using the 1D Rayleigh-Love rod theory, incorporating transverse inertia effects. Solutions for the transient responses of the rod are obtained through Laplace transform method. The study calculates the rebound time, coefficient of restitution, and impact-induced lateral additional stress, showing that local tensile stress can significantly damage brittle rods. The analytical results are in good agreement with finite element simulations, providing a theoretical basis for failure analysis of brittle materials under Taylor impact.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Mechanical
Bin Jiang, Jiayi Hu, Yazhou Guo, Jian Li, Yi Ding, Qiuming Wei, Tao Suo, Yulong Li
Summary: The impact strength of brittle solids is traditionally measured using the SHPB technique, which generates a single stress wave loading on the specimen. However, experiments using the newly developed ESHPB technique, which launches multiple stress pulses simultaneously, revealed significant discrepancies in the measured compressive strength. The loading stress waves were found to largely determine the compressive strength, suggesting that the method of loading stress waves plays a crucial role in measuring the impact strength of brittle solids.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Physics, Applied
T. Z. Shen, H. Y. Song, M. R. An, Y. L. Li
Summary: This study investigates the effects of twin boundary spacing and nickel concentration on the mechanical properties and deformation behavior of nano-twinned HEA through molecular dynamics simulation. The results show that the decrease in twin boundary spacing causes the average flow stress of the HEA to change from strengthening to softening, and the nickel concentration can also affect the mechanical properties of the HEA.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Dongyang Qin, Feng Zhao, Yulong Li
Summary: In this paper, a homogeneous bimodal Ti-5553 alloy with a prior-beta grain size of 15 μm is successfully fabricated through elaborate thermo-mechanical processing in the alpha+beta field, solution, and aging. The strength and ductility of the alloy are explored at various aging temperatures. The study finds that the achievable yield strength and tensile elongation of the alloy aged at 500 degrees Celsius are 1430 MPa and 9.5%, respectively. The strength of the bimodal alloy aged at 620 degrees Celsius first increases with aging time, reaches a maximum value of 1079 MPa after 2 hours, and then remains constant. Surprisingly, the tensile elongation of the bimodal alloys aged at 620 degrees Celsius is the same as that of the solution-treated alloy. Aging at 700 degrees Celsius does not have a strengthening effect but improves the alloy's ductility. The precipitation kinetics of grain boundary alpha (α(GB)) precipitation is more active than that of intragranular alpha (α(Intra)) precipitation within the aging temperature range of 500 degrees Celsius to 700 degrees Celsius. However, α(GB) precipitation does not contribute to strengthening the alloy. The yield strength of the bimodal Ti-5553 alloy depends on the dislocation density of the beta phase and the size effects of the prior beta grains. The ductility of the alloy is influenced by the plasticity of α(GB) and the stress concentration at the beta/α(Intra) interface. The combination of strength and ductility in the high-strength bimodal Ti-5553 alloy can be further improved by optimizing the thickness of α(GB).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Computer Science, Interdisciplinary Applications
Bao Zhang, Ke Jin, Yong Kou, Xiaojing Zheng, Yulong Li
Summary: When conductors are subjected to powerful impulse current, high-velocity friction, and a strong time-dependent magnetic field, the response of the structure is significantly influenced by these extraordinary environments. A transient multi-field coupling mathematical model is proposed to study the magnetic field, thermal field, and structural deformation, as well as their coupling characteristics. The model considers the effects of multi-field coupling and structural deformation, resulting in a more accurate description of the magneto-electro-thermo-mechanical response, multiphysics characteristics, and velocity skin effects. Experimental validation confirms the accuracy of the model.
COMPUTERS & STRUCTURES
(2022)
Article
Construction & Building Technology
Liangliang Xu, Yu Duan, Yulong Li
Summary: This study investigated the effects of porosity, gradient, and impact velocity on the mechanical behavior and deformation mechanism of foamed concrete. It found that compressive strength increases with decreasing porosity, and that foamed concretes with similar porosity but different pore sizes and distances exhibit consistent stress-strain curves. Graded foamed concrete generates initial deformation in the region with the highest porosity under an impact velocity of 1 m/s.
CONSTRUCTION AND BUILDING MATERIALS
(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.
