Article
Nanoscience & Nanotechnology
Ehsan Gerashi, Mohammad Asadollahi, Reza Alizadeh, Reza Mahmudi
Summary: The effects of Sr additions on the microstructural evolution, thermal stability, and mechanical properties of a cast Mg-4Zn alloy were investigated. Sr additions increased the hardness and shear strength of the alloy, and improved its thermal stability by inhibiting grain growth.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Xuejian Zhang, Hongwei Wang, Fengbai Ye, Chunming Zou, Zunjie Wei
Summary: This study investigates the cooperative effect of Mg and Si contents on the microstructural evolution, mechanical properties, and deformation behavior of cast Al-Li-Mg-Si alloys. It is found that increasing Mg content improves the strength and ductility of the alloys, while increasing Si content increases the amount of intergranular Si-rich phases. The study also reveals the strain partitioning behavior at the interface of Mg2Si precipitates and AlLiSi particles, and establishes a methodological framework to understand the effect of precipitates and intergranular phases on the deformation behaviors of materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Multidisciplinary Sciences
Engie M. Safwat, Rania E. Hammam, M. E. Moussa, Soha A. Abdel-Gawad, Madiha Shoeib, Shimaa El-Hadad
Summary: Mg-3Zn-xSi (x=0, 0.1, 0.3, and 0.6 wt%) biodegradable alloys were produced and characterized in terms of microstructure, corrosion behavior and biocompatibility. Electrochemical investigations showed that Mg-3Zn alloys enclosing Si had suitable degradation rates for structural support until bone healing, while the alloy without Si had a lower corrosion rate. None of the alloys exhibited significant cytotoxicity, with the alloy containing 0.3 wt% Si showing the highest ALP level. The alloys also demonstrated calcium phosphate precipitation, making them promising biodegradable materials with compatible degradation rates, cytocompatibility, high cell viability and excellent osseointegration potential.
SN APPLIED SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Jianwei Dai, Qiangsheng Dong, Yujin Nie, Yongqiang Jia, Chenglin Chu, Xiaobo Zhang
Summary: The microstructures, mechanical properties, and corrosion behaviors of Mg-4Gd-xY-1Zn-0.5Ca-1Zr (x = 1, 3, and 5 wt.%) alloys under as-cast condition were investigated. It was found that Y addition significantly improved the yield strength and corrosion resistance of the alloys.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Tao Lv, Yuwen Jiang, Jinquan Chen, Binbin Deng, Feng Peng, Xuezhi Lin, Guihong Liu, Chuanqiang Li, Xiaofei Zheng, Jin Xiao
Summary: This study investigated the effect of homogenization treatment on the microstructure, corrosion resistance, and biological performance of as-cast Mg-4Zn-1Ca alloy. The results showed that homogenization treatment improved the compactness of the Ca2Mg6Zn3 phase and corrosion resistance of the alloy. Additionally, the as-homogenized alloy exhibited better compatibility and osteogenic differentiation ability with rat bone marrow stem cells. Therefore, the as-homogenized Mg-4Zn-1Ca alloy has potential for orthopedic applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Liang Wu, Xianfeng Li, Haowei Wang
Summary: The addition of minor Mg to cast Al-Li-Cu-Zr alloy can improve its microstructure and mechanical properties, enhance age-hardening and precipitation kinetics, promote nucleation and growth of precipitates, and inhibit the coarsening of precipitate-free zones. The 0.2% Mg alloy shows the best balance between ductility and strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Phacharaphon Tunthawiroon, Mettaya Kitiwan, Kasama Srirussamee, Yunping Li, Kenta Yamanaka, Akihiko Chiba
Summary: The study demonstrated that the addition of Si stabilizes Cr oxide on the alloy surface, suppresses Co-oxide formation, and reduces oxide thickness by forming a SiO2 sub-layer that acts as a barrier against inward and outward diffusion of oxygen and chromium.
Article
Materials Science, Multidisciplinary
Tongtong Cao, Yong Zhu, Yuyang Gao, Yan Yang, Gang Zhou, Xiaofei Cui, Chen Wen, Bin Jiang, Xiaodong Peng, Fusheng Pan
Summary: The microstructure of the Mg-Li-Zn-Mn alloy was refined and precipitates were uniformly distributed through hot extrusion. The as-extruded alloy exhibited improved mechanical properties, including higher yield strength, ultimate tensile strength, and elongation. Both the as-extruded and as-cast alloys showed superior damping capacities.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiang Peng, Xu Shihao, Dehua Ding, Guanglan Liao, Guohua Wu, Wencai Liu, Wenjiang Ding
Summary: The influences of Sn and Y on LAZ532 alloy were investigated, showing improved mechanical properties and corrosion resistance. LAZ532-0.8Sn-1.2Y alloy demonstrated the best mechanical properties and corrosion resistance, with the smallest corrosion current density and the lowest anodic dissolution rate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Han Zhang, Qitang Hao, Xinlei Li, Wentao Yu, Yanqing Xue
Summary: This study investigated the effect of Mn content on the microstructure evolution and mechanical properties of Al-Cu-Mg-x Mn alloys at ambient temperature. The findings showed that with the increase in Mn content, the majority of the Al2Cu phase dissolved, and the dispersion of the TMn phase was promoted while inhibiting the growth and transformation of the theta'' phase. Tensile test results demonstrated excellent mechanical properties in the 0.7 wt.% Mn alloy.
Article
Materials Science, Multidisciplinary
Mohammad Zohrevand, Reza Alizadeh, Reza Mahmudi
Summary: Recently, the use of novel super light Mg-Li based alloys as biodegradable implants has attracted considerable attention. However, these alloys, like most biodegradable Mg alloys, suffer from high degradation rates and poor mechanical properties. In this study, the effects of alloying, heat treatment, and severe plastic deformation on the microstructure, biodegradation behavior, and mechanical properties of Mg-Li based alloys were evaluated and compared. The results showed that the addition of Ca improved both the mechanical strength and corrosion resistance of the as-cast base alloy. Homogenization treatment improved the corrosion resistance but led to a slight decrease in mechanical strength. Multi-directional forging resulted in improved mechanical and corrosion properties due to a more uniform distribution of fine secondary phases and reduced grain size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Cunlong Wang, Hongtao Li, Qiyang He, Jili Wu, Guohua Wu, Wenjiang Ding
Summary: The paper reports a comparative study on the influence of environmental temperature on microstructural evolution and tensile mechanical behaviors of squeeze cast and gravity cast magnesium alloys. The results show that the ultimate tensile strength and elongation of the squeeze cast alloy are improved compared to the gravity cast alloy. The abnormal increase in strength within a certain elevated temperature range is attributed to insufficient strain hardening at lower temperatures, restricting further plastic deformation.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
He Xie, Guohua Wu, Xiaolong Zhang, Jinshuo Zhang, Wenjiang Ding
Summary: The addition of Yb element in Mg alloy can significantly improve the age hardening response, increase the yield strength, but decrease the ductility of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Jianxin Zhou, Hong Yang, Xiaojun Luo, Wenlong Xie, Bin Jiang, Zhihua Dong, Jiangfeng Song, Junyao Xu, Guangsheng Huang, Dingfei Zhang, Fusheng Pan
Summary: The effects of extrusion temperatures on the microstructures and mechanical properties of GW alloys were investigated. The results showed that the alloy extruded at 430°C exhibited the highest mechanical properties due to the fine grains, specific orientation, and strengthening effect of LPSO phase. Different deformation modes were observed at different temperatures, with slips and kinks as the primary modes below 300°C and grain boundaries becoming vulnerable sites at 350°C. An abnormal increase in mechanical properties was observed at 300°C for alloys extruded at higher temperatures, which was attributed to the occurrence of multiple-slip.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Gabriel Benedet Dutra, Ulrich Tetzlaff, Tiago Vieira Cunha, Carlos Eduardo dos Santos, Georges Lemos
Summary: Nickel-based superalloys are often surface welded onto grey cast iron for industrial applications, and the microstructural evolution of the interface was investigated in this study. Different phases were identified in various regions, and the hardness values varied accordingly.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
A. Movahedi-Rad, R. Alizadeh
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2017)
Article
Nanoscience & Nanotechnology
Seyed Alireza Torbati-Sarraf, Reza Alizadeh, Reza Mahmudi, Terence G. Langdon
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Materials Science, Multidisciplinary
R. Alizadeh, R. Mahmudi, O. A. Ruano, A. H. W. Ngan
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2017)
Article
Materials Science, Multidisciplinary
Mohammad Javad Esfandyarpour, Reza Alizadeh, Reza Mahmudi
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2019)
Article
Materials Science, Multidisciplinary
J. -Y. Wang, N. Li, R. Alizadeh, M. A. Monclus, Y. W. Cui, J. M. Molina-Aldareguia, J. LLorca
Article
Engineering, Mechanical
T. R. Bieler, R. Alizadeh, M. Pena-Ortega, J. Llorca
INTERNATIONAL JOURNAL OF PLASTICITY
(2019)
Article
Engineering, Mechanical
S. Haouala, R. Alizadeh, T. R. Bieler, J. Segurado, J. LLorca
INTERNATIONAL JOURNAL OF PLASTICITY
(2020)
Article
Materials Science, Multidisciplinary
R. Alizadeh, J. LLorca
Article
Nanoscience & Nanotechnology
R. Alizadeh, M. Pena-Ortega, T. R. Bieler, J. LLorca
SCRIPTA MATERIALIA
(2020)
Article
Nanoscience & Nanotechnology
G. Esteban-Manzanares, R. Alizadeh, I Papadimitriou, D. Dickel, C. D. Barrett, J. LLorca
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Health Care Sciences & Services
Joel Mintz, Chase Labiste, Michael DiCaro, Evan McElroy, Reza Alizadeh, Kunyong Xu
Summary: COVID-19 has disrupted ophthalmic practice worldwide. Patients with age-related macular degeneration (AMD) may experience poor outcomes during the pandemic. Teleophthalmology can aid in the continuity of care for AMD patients. Risk-stratification models and at-home monitoring devices can be used to screen and detect neovascular AMD (nAMD) remotely. Telemedicine triage and smartphone fundus photography can help with management and detection of suspected nAMD. Teleophthalmology can also play a role in screening patients for COVID-19 and reaching underserved populations.
JOURNAL OF TELEMEDICINE AND TELECARE
(2022)
Article
Nanoscience & Nanotechnology
Reza Alizadeh, Jingya Wang, Javier LLorca
Summary: The mechanical properties of Mg-4wt.% Zn alloy single crystals were investigated through micropillar compression testing, revealing that pyramidal slip in precipitation hardened alloy leads to homogeneous deformation and strong hardening. The presence of rod-shape precipitates perpendicular to the basal plane significantly reduces the plastic anisotropy of Mg.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Review
Metallurgy & Metallurgical Engineering
Ehsan Gerashi, Reza Alizadeh, Terence G. Langdon
Summary: Magnesium and its alloys are lightweight and potential bioresorbable materials, but their corrosion resistance is poor. This review summarizes the effects of crystallographic texture and twinning on the corrosion behavior of magnesium and its alloys, revealing contradictory results.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Nanoscience & Nanotechnology
Ehsan Gerashi, Mohammad Asadollahi, Reza Alizadeh, Reza Mahmudi
Summary: The effects of Sr additions on the microstructural evolution, thermal stability, and mechanical properties of a cast Mg-4Zn alloy were investigated. Sr additions increased the hardness and shear strength of the alloy, and improved its thermal stability by inhibiting grain growth.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Meysam Mohammadi-Zerankeshi, Mohammad Zohrevand, Reza Alizadeh
Summary: Developing antibacterial biodegradable Mg alloys is crucial for preventing infection and inflammation during healing. Mg-2Ag alloy is a suitable candidate with good biocompatibility and antibacterial activity, but its fast degradation rate hinders its clinical application. To address this issue, a hydrothermal coating technique was used to synthesize a barrier coating on the Mg-2Ag alloy using distilled water. The microstructure of the substrate played a vital role in the coating quality and degradation behavior, with the solution-treated alloy showing improved corrosion resistance compared to the as-cast alloy due to its homogenized microstructure and formation of a more compact and integrated coating.
