Article
Metallurgy & Metallurgical Engineering
Ming Gao, Ke Yang, Lili Tan, Zheng Ma
Summary: In this study, fine-grained ZN20 alloy was obtained by combining ECAP with extrusion, resulting in improved ductility and corrosion resistance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Evgeniy Merson, Vitaliy Poluyanov, Pavel Myagkikh, Dmitri Merson, Alexei Vinogradov
Summary: The study demonstrates that stress-corrosion cracking (SCC) in magnesium and its alloys during slow-strain rate tensile testing in air is related to hydrogen embrittlement and the corrosion product layer. However, the complete recovery of mechanical response and elimination of harmful embrittling features can be achieved by removing corrosion products from the surface of pre-exposed specimens, which challenges the common viewpoint that SCC mechanism is solely governed by diffusible hydrogen.
Article
Nanoscience & Nanotechnology
Ming Gao, Iniobong P. Etim, Ke Yang, Lili Tan, Zheng Ma
Summary: This study improved the microstructure and mechanical properties of ZN20 alloy wire by combined processing of ECAP, FSP, extrusion, and hot drawing, enhancing the tensile strength and ductility while decreasing the corrosion rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Mikhail Linderov, Alexander Brilevsky, Dmitry Merson, Alexei Danyuk, Alexei Vinogradov
Summary: Magnesium alloys, especially in medical applications, face challenges due to their poor resistance to environmentally assisted fracture and bio-corrosion degradation. This study focuses on the corrosion fatigue behavior of a popular Mg-Zn-Zr alloy, specifically examining the effects of testing frequency, surface roughness, and metallic coatings. The results demonstrate that the occurrence of corrosion fatigue in Mg alloys is influenced by multiple factors, showing a complicated interplay between corrosion damage, stress corrosion cracking, and cyclic loads.
Article
Materials Science, Multidisciplinary
Evgeniy D. Merson, Vitaliy A. Poluyanov, Pavel N. Myagkikh, Alexander S. Bunev, Dmitri L. Merson, Alexei Vinogradov
Summary: The study investigates the effect of hydrofluoric acid treatment on the corrosion and stress corrosion cracking (SCC) susceptibility of Mg-Zn-Ca alloy. It is found that the treatment significantly reduces the corrosion rate and SCC susceptibility of the alloy. The improvement in corrosion and SCC performance is attributed to the formation of a protective surface film, removal of surface contaminations, and dissolution of secondary phase particles.
Article
Engineering, Biomedical
Vasanth C. Shunmugasamy, Marwa AbdelGawad, Muhammad Umar Sohail, Talal Ibrahim, Talha Khan, Thomas Daniel Seers, Bilal Mansoor
Summary: The microstructure of a biodegradable Mg-Zn-RE-Zr alloy was improved by friction stir processing (FSP), resulting in enhanced corrosion resistance and mechanical properties. In vivo evaluation showed promising potential for osseointegration and controlled biodegradability. This study has significant implications for bone fracture management.
BIOACTIVE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jia-Sheng Li, Mei-Xuan Li, Zhen-Ming Hua, Yuan-Ting Mo, Kai Guan, Min Zha, Yipeng Gao, Hui-Yuan Wang
Summary: The corrosion resistance of Mg-0.6Al-0.5Mn-0.2Ca alloy sheet can be improved by micro-alloying with 0.3 wt.% Ce, and the strength can be augmented after aging treatment. The addition of Ce decreases the activity of cathodic phases and forms a protective surface film, contributing to the high strength and satisfactory ductility of the alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zhao-Yuan Meng, Cheng Wang, Zhen-Ming Hua, Min Zha, Hui-Yuan Wang
Summary: Through achieving extraordinary fine-grain thermal stability under high-temperature solid-solution treatment, the dilute Mg alloy exhibits fine-grained structure and impressive mechanical properties, highlighting the importance of high-temperature solid-solution in developing high-strength alloys.
MATERIALS RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Bo Li, Yonghua Duan, Shanju Zheng, Mengnie Li, Mingjun Peng, Huarong Qi
Summary: A fine-grained 55Mg-35Pb-9.2Al-0.8B alloy with the addition of rare earth (RE) was fabricated through equal channel angular pressing (ECAP). The corrosion behavior was investigated using electrochemical test, hydrogen evolution test, and salt spray test. The results showed that the addition of RE elements significantly improved the corrosion resistance of the alloy, with 0.5Sc having the most significant effect. The microstructure of the alloy was refined and the dispersion of the second phase was reduced by adding RE elements and ECAP, leading to improved corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Electrochemistry
Priyabrata Das, T. S. Sampath Kumar, Kisor K. Sahu, Srikant Gollapudi
Summary: This review paper focuses on the challenges and advancements in mitigating corrosion-related issues for in-vivo use of biodegradable magnesium alloy implants. The degradation behavior of different magnesium alloys and various surface modification techniques are discussed. Recent developments in magnesium-based bioimplants and clinical trials are also reviewed.
Article
Materials Science, Multidisciplinary
Ding Yutian, Lei Jian, Zhang Hongfei, Shen Yue, Li Ruimin, Gao Yubi, Chen Jianjun
Summary: An ultra-fine-grained Mg-2.5Zn-1Ca alloy was prepared using extrusion + equal channel angular extrusion (ECAP) composite processing technology. The deformation process led to significant refinement of the grains and the second phase grains, resulting in a uniform fine grain structure. The mechanical properties of the alloy were improved by ECAP deformation, with the alloy after two passes ECAP exhibiting the highest tensile strength and elongation. The microstructure of the ECAP deformation alloy was uniformly refined, leading to better elongation of the material.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Chemistry, Physical
Denis A. Aksenov, Ayrat A. Nazarov, Georgiy Raab, Arseniy G. Raab, Elvira Fakhretdinova, Rashid N. Asfandiyarov, Maria A. Shishkunova, Yulia R. Sementeeva
Summary: This study investigates the effects of the combined process of reduction and equal channel angular pressing, as well as subsequent ultrasonic irradiation, on the structure, strength, and corrosion properties of Mg-Al-Zn alloy. The deformation processing resulted in increased strength but reduced corrosion resistance in HCl medium. Ultrasonic treatment led to further improvement in strength and corrosion resistance of the alloy.
Article
Materials Science, Multidisciplinary
Zhen-Ming Hua, Min Zha, Zhao-Yuan Meng, Shen-Bao Jin, Gang Sha, Tian-Shuai Wang, Cheng Wang, Hai-Long Jia, Yipeng Gao, Hui-Yuan Wang
Summary: By manipulating solute distribution while keeping a fine-grain structure, achieving appreciable strain-aging hardening response coupling with fine-grain strengthening guarantees the development of strong dilute Mg alloy.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Pratyush Mishra, Denizhan Yavas, Abdullah Alshehri, Pranav Shrotriya, Ashraf Bastawros, R. Kurt Hebert
Summary: The paper presents a model for intergranular corrosion of nonsensitized low-carbon pipeline steels, where enhanced grain boundary oxidation is explained by vacancies produced by reactive Si atoms. Experimental evidence supports the role of vacancy diffusion in the evolution of IGC, with calculations showing agreement with experimental measurements. The rationalization of sharpening of GB grooves over time during corrosion exposures and the quantitative explanation of IGC enhancement by vacancy diffusion without solute segregation or precipitation at GBs are key findings.
Article
Materials Science, Multidisciplinary
Huan Liu, Jia Ju, Xiao-Wei Yang, Yu-Hua Li, Jing-Hua Jiang, Ai-Bin Ma
Summary: A high-strength Mg-10Gd-2Y-1.5Zn-0.5Zr (wt%) alloy was prepared via eight passes of equal-channel angular pressing (ECAP), and its microstructures and mechanical properties were investigated. The results showed that the as-cast alloy consisted of various phases, while the ECAP alloy exhibited deformed and broken Mg-3(Gd,Y,Zn) phase. The refined Mg-3(Gd,Y,Zn) particles, dynamic recrystallization (DRX) grains, and kinked 14H LPSO phase contributed to the excellent mechanical properties of the ECAP alloy.
Article
Materials Science, Multidisciplinary
Zhen Li, Xin Li, Zhiyuan Huang, Zhenxuan Zhang, Xiong Liang, Huan Liu, Peter K. Liaw, Jiang Ma, Jun Shen
Summary: This study demonstrates a simple method to enhance the plasticity of entropic alloys at ambient temperature using ultrasonic vibration. The compression strain of the alloy is significantly increased with high-strain rate and cyclic loading, resulting in improved microstructural evolution and plasticity performance.
Article
Metallurgy & Metallurgical Engineering
Shu-heng He, Ce Wang, Chao Sun, Yue Zhang, Kai Yan, Jing-hua Jiang, Jing Bai, Feng Xue, Huan Liu
Summary: This study investigates the effect of separate Al2Ca and Mg2Ca phases on the corrosion properties of Mg-Al-Ca-Mn alloys. The results show that ECAP alloys corrode slower compared to as-cast alloys, thanks to the dispersion and refinement of the second phase. Additionally, the corrosion degree is lower in the presence of the Al2Ca phase compared to the Mg2Ca phase, indicating that Al2Ca phase enhances the corrosion resistance of Mg-Al-Ca-Mn-based alloys more effectively.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Xiaoru Zhuo, Cong Shao, Peng Zhang, Zhichao Hu, Huan Liu
Summary: This study investigated the effect of different rolling reductions on the microstructure and mechanical performance of Mg-5Sn alloy. The results show that increasing rolling reduction leads to a decrease in grain size, an increase in the area fraction of Mg2Sn particles and dislocation density, and an enhancement in yield strength and ultimate tensile strength. Conversely, the elongation decreases. The alloy with a rolling reduction of 70% exhibits the highest strength of 310 MPa and an elongation of 8.4%. The strength enhancement is attributed to precipitation strengthening, grain refinement strengthening, and dislocation strengthening.
Review
Materials Science, Multidisciplinary
Xiaoru Zhuo, Liyan Zhao, Wei Gao, Yuna Wu, Huan Liu, Peng Zhang, Zhichao Hu, Jinghua Jiang, Aibin Ma
Summary: This paper reviews recent progress of Mg-Sn based alloys from the perspective of the relationship between aging response and mechanical performance, aiming to provide guidance for the development of high-performance Mg-Sn based alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Lifeng Ye, Huan Liu, Chao Sun, Xiaoru Zhuo, Jia Ju, Feng Xue, Jing Bai, Jinghua Jiang, Yunchang Xin
Summary: In this study, energy-saving and efficient rotary-die equal-channel angular pressing (ECAP) was successfully applied to a low Mg content zinc alloy, resulting in the formation of a microstructure with fine grains and dynamically precipitated nano-sized Mg-Zn precipitates. The alloy exhibited excellent mechanical properties and a suitable biodegradation rate, making it a promising candidate for biodegradable medical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Xiaoru Zhuo, Wei Gao, Liyan Zhao, Shulin Zhao, Huan Liu, Zhichao Hu, Peng Zhang, Yuna Wu, Jinghua Jiang, Aibin Ma
Summary: A bimodal grain structured Zn-0.4Mg-0.02Mn alloy with superior strength-ductility synergy was successfully prepared by combined equal channel angular pressing (ECAP) and cold rolling. The alloy exhibits an ultimate tensile strength (UTS) of 334.4 MPa and an elongation (EL) of 40.0%, far surpassing the benchmark for medical implants. The mechanical superiority of the alloy is attributed to hetero-deformation induced (HDI) strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Letter
Materials Science, Multidisciplinary
Wen-Xin Wen, Lu-Yao Li, Zhen Li, Wen-Qing Ruan, Shuai Ren, Zhen-Xuan Zhang, Xiong Liang, Huan Liu, Jiang Ma
Article
Engineering, Chemical
Yuhua Li, Qiong Xu, Aibin Ma, Jin Zhang, Yalong Shen, Jinghua Jiang, Yaqing Jiang, Huan Liu
Summary: In this study, single pass rolling with varied rolling reductions was conducted on pre-homogenized AZ91 alloys and ECAP-processed AZ91 alloys. The effects of rolling reduction on the microstructures and mechanical properties of HR alloys and HER alloys were investigated. The results showed that the HER alloys possessed finer microstructures and superior mechanical properties which were influenced by the rolling reduction. The microstructures of the HER alloys became bimodal and the strength and elongation markedly improved with the increase in the rolling reduction. When the rolling reduction reached 70%, the HER alloys acquired a typical bimodal structure, contributing to their excellent comprehensive mechanical properties.
Article
Chemistry, Physical
Chao Sun, Huan Liu, Xiaoru Zhuo, Yuna Wu, Kai Yan, Jia Ju, Jinghua Jiang, Feng Xue, Jing Bai
Summary: A heterogeneous lamellar structure is achieved in Mg97Y2Zn1 alloy through large-ratio hot extrusion, resulting in improved mechanical properties compared to other Mg97Y2Zn1 alloys. The alloys in as-cast and as-annealed stages have ultimate tensile strengths of 426.5 and 471.4 MPa, and fracture elongations of 8.1% and 1.0% respectively. The increased strength in the as-annealed alloy is attributed to narrower spacing of <<-Mg and LPSO layers, refined DRX grains and LPSO particles, and a higher volume fraction of LPSO phase. However, the as-annealed alloy has poor ductility due to the easy aggregation of dislocations and stress in the narrower layers. It is suggested that tailored mechanical properties can be achieved through annealing and large-ratio hot extrusion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Chengwei Ji, Aibin Ma, Jinghua Jiang, Haoran Wu, Huan Liu, Sensen Guo, Yuxuan Yuan
Summary: A combined process of cold rolling and equal channel angular pressing (ECAP) was developed to improve the mechanical properties and localized corrosion of Zn-0.6Mg alloy for biodegradable implants. After cold rolling and ECAP processing, the alloy exhibited significantly improved strength and ductility compared to the as-cast alloy, with the alloy processed by 8-pass ECAP+CR75% (ER) showing the best mechanical properties. The eutectic phase fragmentation and grain refinement caused by cold rolling and ECAP process reduced the galvanic corrosion tendency of the alloy, resulting in improved corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Liyan Zhao, Xiaoru Zhuo, Wei Gao, Shulin Zhao, Huan Liu, Zhichao Hu, Peng Zhang, Yuna Wu, Jinghua Jiang, Aibin Ma
Summary: Zn-Ag alloys have great potential for use as biodegradable implant materials due to their harmless degradation products, suitable degradation rate, and excellent biocompatibility. However, their mechanical properties often do not meet the requirements for medical implants. This study achieved a bimodal grain structured Zn-0.5Ag-0.2Mg alloy with high strength and ductility through a combination of equal channel angular pressing (ECAP) and cold rolling (CR), surpassing the properties of alloys obtained through ECAP or CR alone. Hetero-deformation induced (HDI) strengthening plays a key role in obtaining the excellent mechanical properties. This work provides practical guidance for the development of high-performance Zn alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Liyan Zhao, Xiaoru Zhuo, Huan Liu, Jinghua Jiang, Aibin Ma
Summary: Zn-Ag alloys, a type of biodegradable material with potential medical applications, usually have inferior mechanical properties. In this study, a Zn-0.5Ag-0.08Mg alloy with high strength and ductility was obtained through equal channel angular pressing (ECAP). Different samples processed with ECAP for varying numbers of passes were evaluated for their microstructure and mechanical properties. The samples processed for 3P, 4P, 8P, and 12P exhibited mechanical properties that meet the application requirements, with the sample processed for 4P achieving the highest ultimate tensile strength (UTS) of 388.1 MPa and excellent elongation (EL) of 45.3%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jingbo Li, Huan Liu, Jun Yin, Yuna Wu, Kai Yan, Jia Ju, Hang Teng, Jinghua Jiang, Jing Bai
Summary: Zinc alloys have the potential to be biodegradable implant materials due to their moderate corrosion rates, but the poor mechanical properties of pure zinc restrict their application. In this study, a Zn-0.1Mg-0.02Mn alloy was rolled at room temperature to different reductions. The alloy with 80% reduction showed the best mechanical performance, meeting the requirements for biomedical implant materials with an ultimate tensile strength of 397.7 MPa and an elongation of 15.9%. Grain refinement played a major role in enhancing the strength, with different deformation mechanisms observed for basal-oriented and non-basal-oriented grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Chao Sun, Huan Liu, Ziyue Xu, Yuna Wu, Kai Yan, Jia Ju, Jinghua Jiang, Feng Xue, Jing Bai, Yunchang Xin
Summary: In this study, a composite deformation strategy was designed to refine the 18R LPSO phase in a Mg97Y2Zn1 alloy into the sub-micron range, resulting in significantly enhanced mechanical properties. The 16P-HE alloy exhibited the best mechanical properties, with contributions mainly from the sub-micron 18R phase and α-Mg grains.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
