Article
Materials Science, Multidisciplinary
K. X. Yin, G. Y. Dong, G. J. Zhang, Q. W. Tian, Y. N. Wang, J. C. Huang
Summary: In this paper, new parameters are developed to assess phase constitutions of solid solutions in 124 HEA systems. A thermodynamic parameter DGF_B is presented to estimate the propensity for a material system to form BCC or FCC solid solutions based on the comparison of their Gibbs free energies. The presence of B2 and L12 ordered phases is found to affect the prediction accuracy, so a new ratio parameter is introduced to predict the structures of solid solution phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Rakesh Bhaskaran Nair, Raunak Supekar, Seyyed Morteza Javid, Wandong Wang, Yu Zou, Andre McDonald, Javad Mostaghimi, Pantcho Stoyanov
Summary: Thermal spray deposition techniques have been widely used to address wear and corrosion issues in extreme environments, and high-entropy alloys (HEAs) have gained attention as advanced materials due to their exceptional properties. This review critically assesses the strengthening mechanisms, wear, corrosion, and oxidation responses of HEAs developed through deposition techniques. The review also focuses on material design principles for next-generation HEAs and emphasizes the need for further evaluation of their tribological behavior for industrial applications in extreme environments.
Article
Materials Science, Multidisciplinary
Zhenhua Ye, Chuanwei Li, Mengyao Zheng, Xinyu Zhang, Xudong Yang, Qing Wang, Jianfeng Gu
Summary: This study achieves remarkable results in both high tensile strength and ductility by preparing Al0.25FeCoNiV HEA with L1(2)/B2 fine-grain duplex microstructure, surpassing other duplex HEAs.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Jiaojiao Yi, Lin Yang, Mingqin Xu, Lu Wang, Lisha Liu, Long Zeng
Summary: In this study, the phase components, microstructures, and compressive properties of a novel 3D transition metal high entropy alloy CuFeNiTiV in the as-cast condition were investigated. The thermodynamic simulations revealed the order of phase separation during solidification, which was confirmed by XRD analysis of the alloy's phase components. The outstanding fracture strength of 2086 MPa in the as-cast alloy was attributed to the deformation resistance of both the major BCC phase and laves phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Taiwen Huang, Jiachen Zhang, Jun Zhang, Lin Liu
Summary: Alloy design of Cr-Co-Ni-Ta eutectic medium entropy alloys was conducted using a CALPHAD method coupled with experimental study, revealing changes in microstructure and mechanical properties with increasing Ta content. CrCoNiTa0.4 EMEA alloy exhibited the highest hardness and compression strength, making it one of the most promising alloys in the study.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
X. Wang, W. Zhai, J. Y. Wang, B. Wei
Summary: The solidification process of high-entropy FeCoNi2Al0.9 alloy was modulated using 20 kHz power ultrasound with a maximum amplitude of 13 μm. The eutectic structures were composed of L12 and B2 phases growing synergistically by the K-S relationship. Increasing the ultrasound amplitude resulted in refined eutectic cell width and regular lamellar spacing, increased proportion of strictly semi-coherent L12/B2 interfaces, and suppressed solute concentration fluctuation in each eutectic phase. The steady-state cavitation and acoustic flow had a significant influence on the evolution of the eutectic microstructure. The alloy exhibited increased yield strength, ultimate strength, and total elongation compared to statically solidified alloy, providing an effective approach to improve the mechanical properties and overcome the strength-ductility trade-off in high-entropy alloys with eutectic structures.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Norhuda Hidayah Nordin, Leong Zhaoyuan, Russell Goodall, Iain Todd
Summary: Control over a lamellar-like-structured high entropy alloy system can be achieved by replacing aluminum with boron. The addition of boron influences the microstructure and phase formation, and the presence of Fe2B phase correlates with interfacial energy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Lu Wang, Jiarui Wang, Hongwei Niu, Gongji Yang, Lin Yang, Mingqin Xu, Jiaojiao Yi
Summary: A near-eutectic high-entropy alloy with a soft-hard dual-phase structure was developed by adjusting the composition ratio and annealing process. The alloy exhibited high yield strength and moderate plasticity, but the homogenization process resulted in the formation of micro-pores, leading to a decrease in mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
X. J. Gao, L. Wang, N. N. Guo, L. S. Luo, G. M. Zhu, C. C. Shi, Y. Q. Su, J. J. Guo
Summary: This paper investigates the effects of Cr addition on the microstructure, phase constitutes, and mechanical properties of the Hf0.5Mo0.5NbTiZr refractory high-entropy alloy. The addition of Cr refines the dendritic structure, increases the strength, and influences the plasticity of the alloy. Homogenization treatment promotes the formation of Laves phase and significantly enhances the strength of the alloy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Multidisciplinary Sciences
Taewon Jin, Ina Park, Taesu Park, Jaesik Park, Ji Hoon Shim
Summary: The properties of solid-state materials are determined by their crystal structures. Machine learning-based approaches have been successful in predicting structural phases of multi-element alloys, saving computational costs and achieving high accuracy without requiring a large training dataset.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Huinan Chang, Yiwen Tao, Peter K. Liaw, Jingli Ren
Summary: In this study, the formation and stability of solid-solution phases in high-entropy alloys were predicted using machine learning. The root mean square residual strain was identified as the most critical parameter, and its effectiveness in quantitatively predicting the stability of solid-solution phases was confirmed. Different algorithms were compared, and the support vector machine was found to be the best algorithm for predicting the phase formation of high-entropy alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xiaohong Wang, Yulei Deng, Tengfei Ma, Qiaoyu Li, Duo Dong, Dongdong Zhu
Summary: Due to its nontoxicity and biocompatibility, the beta-type Ti35Zr25Ta15Nb15Sn10 biomedical high entropy alloy (BHEA) has been studied as an advanced biomedical material. However, the strength of the alloy needs improvement. Therefore, this study aimed to explore the feasibility of using ultrahigh-pressure methods to regulate the strength of the alloy.
Article
Chemistry, Physical
Denis Klimenko, Nikita Stepanov, Roman Ryltsev, Sergey Zherebtsov
Summary: The prediction of phase composition in metallic alloys is a challenge in material science, which can be effectively addressed using machine learning algorithms. This study focuses on the prediction of phase composition in high-entropy alloys and achieves an accuracy of over 91% by combining genetic algorithms and a multi-label classification scheme.
Article
Nanoscience & Nanotechnology
Hailong Huang, Yan Sun, Peipei Cao, Yuan Wu, Xiongjun Liu, Suihe Jiang, Hui Wang, Zhaoping Lu
Summary: This study extensively investigated the phase stability of high entropy alloys (HEAs) at intermediate temperatures and found that the effect of cooling rates on refractory HEAs depends on the alloy composition and material properties. This provides a new approach for optimizing the properties of HEAs.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Jiaojiao Yi, Lin Yang, Lu Wang, Mingqin Xu
Summary: A lightweight, refractory high entropy alloy CrNbTa0.25TiZr was prepared by arc-melting under vacuum, with as-cast and annealed samples showing improvement in yield strength and lower density compared to a reference alloy. The evolution of the microstructure highlights the promising strength of CrNbTa0.25TiZr.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Lola Lilensten, Stoichko Antonov, Baptiste Gault, Sammy Tin, Paraskevas Kontis
Summary: This study investigates the differences in creep behavior of polycrystalline Ni-based superalloys with two different Nb contents, attributing the mechanical performance variation to phase transformations along planar faults. The presence of stacking faults and their composition in the alloys are analyzed using electron channeling contrast imaging and atom probe tomography, revealing insights into the underlying mechanisms of creep strain rate differences. The findings suggest a potential atomic-scale driven alloy design approach for enhancing creep resistance by promoting local phase transformations along planar faults at 750 degrees C.
Article
Nanoscience & Nanotechnology
Linhan Li, Eugene Sun, Sammy Tin
Summary: This study investigated the stress relaxation behavior at 700°C of two experimental and one commercial powder-possessed Ni-base superalloys with different microstructural characteristics under two different strain levels (0.6% and 2%). The results showed that phosphorus additions, secondary ?? microstructure, and tertiary ?? microstructure have different effects on stress relaxation behavior. Compositional and microstructural variations impact stress relaxation behavior differently following deformation to a total strain of 0.6%, but not after a total strain of 2%.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Dhruv Tiparti, I-Ting Ho, Kai-Chun Chang, Tzu-Hou Hsu, An-Chou Yeh, Sammy Tin
Summary: The study shows that adding varying amounts of CoAl2O4 during selective laser melting of Inconel 718 can lead to moderate grain refinement, but excessive amounts can cause particle agglomeration and slag inclusion formation, affecting grain recrystallization during subsequent heat treatment processes.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Se-Ho Kim, Stoichko Antonov, Xuyang Zhou, Leigh T. Stephenson, Chanwon Jung, Ayman A. El-Zoka, Daniel K. Schreiber, Michele Conroy, Baptiste Gault
Summary: The global development of electric vehicles and energy storage has sparked interest in battery technology, requiring detailed understanding of battery microstructure and chemistry for long-term, sustainable, and safe operation. Atom probe tomography (APT) with sub-nanometre resolution plays a key role in battery research, but faces challenges such as electric field-driven migration and sample preparation. Methods to shield from the electric field and address these challenges are discussed to enable accurate analysis of battery materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
K. A. Rozman, M. Detrois, M. C. Gao, P. D. Jablonski, J. A. Hawk
Summary: Current research shows that high-entropy alloys, specifically the CoCrFeNi family, exhibit superior oxidation resistance and comparable tensile mechanical performance to traditional austenitic stainless steels. This study presents the results of uniaxial tensile creep tests on an equiatomic CoCrFeNi alloy, providing insights into its performance compared to other low- and medium-entropy alloys. The analysis reveals similar creep behavior, activation energy, and stress exponent to the CoCrFe medium-entropy alloy and the CoCrFeNiMn high-entropy alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Wenrui An, Satoshi Utada, Xiaotong Guo, Stoichko Antonov, Weiwei Zheng, Jonathan Cormier, Qiang Feng
Summary: This study investigates the effects of overheating and thermal cycling on the creep properties and microstructural evolution of a directionally solidified superalloy. The results show that thermal cycling significantly reduces the creep life and leads to severe microstructural degradation.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Martin Detrois, Stoichko Antonov, Kyle A. Rozman, Jeffrey A. Hawk, Paul D. Jablonski
Summary: Resistance to creep deformation is crucial for cast and wrought Ni-based superalloys in next generation energy systems. The addition of Nb or Ta, along with high temperature aging (HTA) heat treatment, significantly improves mechanical strength and creep life of the alloy. The Ti/Al ratio can be used to design alloys with preferential formation of gamma ' or gamma '' precipitates, and using Nb or Ta additions with HTA heat treatment can improve the creep life of IN725 by up to 256 pct.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Rongpei Shi, Dian Li, Stoichko Antonov, Xingjun Liu, Yufeng Zheng
Summary: This study systematically investigates the morphological variations of grain boundary precipitates in a beta titanium alloy, revealing three distinct regimes of alpha morphology at a beta GB separated by critical angles, which are determined by the inclination angle between the habit plane of the GB alpha and the hosting GB plane.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Stoichko Antonov, Kyle A. Rozman, Paul D. Jablonski, Martin Detrois
Summary: With the increasing temperature and pressure requirements in land-based turbines for power generation, the study of high-temperature alloys becomes more important. This study investigated the effect of carbon content on the fabrication and properties of Nimonic 105 alloy. Lowering the carbon content improved the creep property and grain size, but also presented challenges in fabrication. Prolonged thermal exposure resulted in complex carbide phase transformation in the low-carbon variant.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Xiaoli Zhuang, Stoichko Antonov, Wendao Li, Song Lu, Longfei Li, Qiang Feng
Summary: The discovery of a stable gamma/gamma' microstructure in Co-Al-W-based alloys has opened up possibilities for Co-based superalloys as potential substitutes for Ni-based superalloys in high-temperature applications. In this study, a framework combining a multicomponent diffusion-multiple and machine learning was developed to systematically study the effects of alloying elements on the microstructures of multicomponent CoNi-based superalloys with high Cr content. This approach enabled the collection of a large amount of experimental data and exploration of alloying effects on microstructural stability and parameters. The insight gained from this study will accelerate the development and application of multicomponent CoNi-based superalloys with high Cr content.
Article
Multidisciplinary Sciences
Kyle A. Rozman, Omer N. Dogan, Richard Chinn, Paul D. Jablonksi, Martin Detrois, Michael C. Gao
Summary: The microstructure of steel greatly affects its mechanical properties. Previous research has used machine learning to predict tensile properties based on the initial microstructures of a wide range of steels.
Article
Metallurgy & Metallurgical Engineering
Martin Detrois, Stoichko Antonov, Jeffrey A. Hawk, Paul D. Jablonski
Summary: Underspecified composition ranges often lead to alloys with unpredictable mechanical performance. To better understand the changes in microstructure and mechanical performance associated with variations of key elements, three versions of P92 are formulated within, or close to, the specified allowable for N, B, and C ranges. It is observed that >80% decrease in creep life occurs at 625 degrees C and 155 MPa for the highest B and N containing alloy. Multiscale characterization reveals key changes due to the trace element variation.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Zongrui Pei, Shiteng Zhao, Martin Detrois, Paul D. Jablonski, Jeffrey A. Hawk, David E. Alman, Mark Asta, Andrew M. Minor, Michael C. Gao
Summary: Metallic alloys have been widely used in human civilization due to their balanced strength and ductility. This study proposes a possible mechanism based on the parameter kappa, which enhances the work-hardening ability of high-entropy alloys. The results offer a physical picture of the strengthening effects and can be used as a practical design principle for enhancing the strength-ductility synergy in metallic materials.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Chang-Yu Hung, Stoichko Antonov, Paul D. Jablonski, Martin Detrois
Summary: Alloys based on Inconel 725 with elevated levels of Nb and Ta were studied for their phase stability and transformation after aging and long-term exposure at 700 degrees C for 10,000 hours. Scanning electron microscopy and transmission electron microscopy were used to characterize the microstructure changes. The results showed that the addition of Nb/Ta promoted the formation of gamma '/gamma'' co-precipitates in the low Ti/Al ratio alloy, while only gamma '' precipitates were present in the high Ti/Al ratio counterpart. After 10,000 hours exposure, complex geometrical closed-packed (GCP) phases formed from the gamma'/gamma'' co-precipitates in a layer-by-layer manner, with plate-like delta phase precipitates decorated by blocky alpha-Cr and enveloped by a wavy gamma ' film.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Materials Science, Multidisciplinary
Martin Detrois, Jeffrey A. A. Hawk, Paul D. D. Jablonski
Summary: This review summarizes the recent development of creep-resistant ferritic-martensitic steels, which are essential materials used in power plants operating at high temperatures. The findings suggest that CPJ-7 steel has superior creep properties at 650 degrees C compared to other alloys, and the refined design of JMP steel shows potential for operation at the same temperature. The review also discusses the influence of various alloy elements on microstructure and mechanical properties.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(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.
