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Recent progress and perspectives in additive manufacturing of magnesium alloys

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Journal of Magnesium and Alloys 2022年第6期10卷 1511-1541页

作者： Zhuoran Zeng Mojtaba Salehi Alexander Kopp Shiwei Xu Marco Esmaily nick birbilis College of Engineering and Computer Science Australian National UniversityACT.2601 Australia Additive Manufacturing Group Singapore Institute of Manufacturing Technology(SIMTech)Agency forScienceTechnology and Research(A∗STAR)73 Nanyang Drive637662 Singapore Meotec GmbH Philipsstr.8AachenGermany State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsh1410082 China Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139United States of America Volvo Materials Technology Laboratory Volvo GroupLundbyGothenburg 41715Sweden

Magnesium alloys remain critical in the context of light-weighting and advanced devices. The increased utilisation of magnesium(Mg)each year reveals growing demand for its Mg-based alloys. Additive manufacturing(AM) provides the possibility to directly manufacture components in net-shape, providing new possibilities and applications for the use of Mg-alloys, and new prospects in the utilisation of novel physical structures made possible from ‘3D printing’. The review herein seeks to holistically explore the additive manufacturing of Mg-alloys to date, including a synopsis of processes used and properties measured(with a comparison to conventionally prepared Mg-alloys). The challenges and possibilities of AM Mg-alloys are critically elaborated for the field of mechanical metallurgy.

关键词： Magnesium Additive manufacturing Microstructure 3D printing Mechanical properties Electrochemical properties

Optimisation of alloy composition for highly-formable magnesium sheet

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1388-1395页

作者： Zhuoran Zeng Mingzhe Bian Shiwei Xu Weineng Tang Chris Davies nick birbilis Jianfeng Nie College of Engineering and Computer Science Australian National UniversityACT.2601Australia Department of Materials Science and Engineering Monash UniversityVIC 3800Australia State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Research Institute(R&D Center) Baosteel Group CorporationShanghai 201999China Department of Mechanical and Aerospace Engineering Monash UniversityVIC 3800Australia

The effectiveness of Ca or Gd addition on ductility and formability of Mg-Zn-Zr based dilute alloys in deep drawing has not been systematically compared *** this study,formable Mg-Zn-Gd-Zr and Mg-Zn-Ca-Zr sheet alloys are produced by hot *** sheets have similarly weakened basal texture,but the sheet of the Mg-Zn-Gd-Zr alloys has higher ductility and formability than that of Mg-Zn-Ca-Zr *** combined addition of 0.2wt%Ca and 0.4wt%Gd to the Mg-1Zn-0.5Zr(wt%)alloy leads to a Mg-1Zn-0.4Gd-0.2Ca-0.5Zr alloy that has even better ductility,and its formability during deep drawing is comparable to the benchmark Al6016 *** increase in Ca content from 0.2wt%to 0.5wt%leads to decreased sheet ductility and formability,predominantly due to grain boundary embrittlement.

关键词： magnesium sheet alloy texture microstructure formability solute segregation

Lithium mapping in a Mg-9Li-4Al-1Zn alloy using electron energy-loss spectroscopy

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Journal of Magnesium and Alloys 2023年第4期11卷 1170-1179页

作者： Yu Zhang Laure Bourgeois Yu Chen Zhuoran Zeng nick birbilis Philip N.H.Nakashima Department of Materials Science and Engineering Monash UniversityVIC 3800Australia Monash Centre for Electron Microscopy Monash UniversityVIC 3800Australia College of Engineering and Computer Science Australian National UniversityACT 2601Australia Faculty of Science Engineering and Built EnvironmentDeakin UniversityVIC 3125Australia

Magnesium-lithium alloys with high lithium content have been attracting significant attention because of their low density,high formability and corrosion *** properties are dependent on the distribution of lithium,which is difficult to map in the presence of *** this work,a ratio spectrum-imaging method with electron energy-loss spectroscopy(EELS)is demonstrated,which enables the mapping of *** application to LAZ941(Mg-9Li-4Al-1Zn in wt.%),this technique revealed that a key precipitate in the microstructure,previously thought by some to be Mg_(17)Al_(12),is in fact rich in *** result was corroborated with a structural investigation by high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM),showing this phase to be Al_(1-x)Zn_(x)Li,with x<<*** work indicates the potential offered by this technique for mapping lithium in materials.

关键词： Lithium mapping Magnesium alloys Electron energy-loss spectroscopy(EELS) High-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)

Recent advances in biodegradation controls over Mg alloys for bone fracture management: A review

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Journal of Materials Science & Technology 2019年第4期35卷 535-544页

作者： Ming-Shi Song Rong-Chang Zeng Yun-Fei Ding Rachel W.Li Mark Easton Ivan Cole nick birbilis Xiao-Bo Chen School of Engineering RMIT University Department of Materials Science and Engineering Monash University College of Materials Science and Engineering Shandong University of Science and Technology School of Mechanical Engineering Huaihai Institute of Technology The Medical School The Australian National University

Magnesium(Mg) alloys possess comparable physical and mechanical properties to bone, making them an outstanding candidate of implant materials for bone fracture treatment. In addition to the excellent biocompatibility, and bioactivity, the engagement of Mg alloys is key for a number of biological functionalities in the human body. The unique biodegradation nature of Mg alloy implants implies that it may not require a secondary removal procedure when the expected supporting tasks accomplish, as they may simply and safely "disappear" over time. Nonetheless, the demonstrated drawback of potentially rapid degradation, is an issue that must be addressed appropriately for Mg implants and is consequently given unique attention in this review article. Herein, the critical criteria and the state-of-the-art strategies for controlling the degradation process of Mg alloys are reported. Furthermore, future developments of biodegradable Mg and its alloys systems with satisfactory specifications for clinical trials and deployment,are discussed. This review aims to provide information to materials scientists and clinical practitioners in the context of developing practical biodegradable Mg alloys.

关键词： Magnesium alloys Biodegradation Corrosion mechanisms Cytocompatibility

Mg_2Si及Si粒子在Al-Mg-Si合金晶间腐蚀中协同作用机理的多电极偶合研究

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中国腐蚀与防护学报 2010年第2期30卷 107-113页

作者：李朝兴李劲风 birbilis nick 贾志强郑子樵中南大学材料科学与工程学院长沙410083 中南大学有色金属材料科学与工程教育部重点实验室长沙410083 ARC Centre of Excellence for Design in Light Metals Department of Materials EngineeringMonash University3800 Australia

通过测定Al-Mg-Si合金晶界各组成相的极化曲线及不同Mg/Si比Al-Mg-Si合金晶界组成相(AlMg_2Si及Al-Mg_2Si-Si)间的动态电化学偶合行为,研究了不同Mg/Si比Al-Mg-Si合金的晶间腐蚀机理。研究表明,晶界Si电位比其边缘Al基体正,在整个腐蚀... 详细信息

通过测定Al-Mg-Si合金晶界各组成相的极化曲线及不同Mg/Si比Al-Mg-Si合金晶界组成相(AlMg_2Si及Al-Mg_2Si-Si)间的动态电化学偶合行为,研究了不同Mg/Si比Al-Mg-Si合金的晶间腐蚀机理。研究表明,晶界Si电位比其边缘Al基体正,在整个腐蚀过程中作为阴极导致其边缘Al基体的阳极溶解。晶界Mg_2Si电位比其边缘Al基体负,在腐蚀初期将作为阳极而发生阳极溶解;由于Mg_2Si中活性较高元素Mg的优先溶解,不活泼元素Si富集,致使Mg_2Si电位正移,甚至与其边缘Al基体发生极性转换,导致其边缘Al基体的阳极溶解。Mg/Si>1.73的Al-Mg-Si合金晶界只存在不连续分布的含Mg、Si的析出相,不能在晶界形成连续腐蚀通道,合金不表现出晶间腐蚀敏感性。Mg/Si<1.73的Al-Mg-Si合金晶界同时析出含Mg、Si析出相和Si粒子;腐蚀首先萌生于Mg_2Si相;而后,Si粒子一方面导致其边缘无沉淀带严重的阳极溶解,另一方面通过加速Mg_2Si和晶界无沉淀带的极性转换,协同促进了Mg_2Si边缘无沉淀带的阳极溶解,即腐蚀沿晶界Si粒子及Mg_2Si粒子边缘的无沉淀带发展。Si粒子促进了腐蚀的发展,导致合金表现出严重的晶间腐蚀敏感性。

关键词： Al-Mg-Si合金晶间腐蚀腐蚀机理

5083铝合金在动态海水/大气界面的局部腐蚀行为及影响机制

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5083铝合金在动态海水/大气界面的局部腐蚀行为及影响机制