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纳米镁合金块体的制备及其力学性能
Preparation and Mechanical Properties of Nanocrystalline Magnesium Alloy
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- DOI:
- 作者:
- 郭卉君 ，樊建锋 ，刘亚芬
GUO Huijun;FAN Jianfeng;LIU Yafen
- 作者单位:
- 新材料界面科学与工程教育部重点实验室太原理工大学 山西新材料科学与工程研究中心太原理工大学 材料科学与工程学院太原理工大学
Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan030024,China;Shanxi Research Center of Advanced Materials Science and Technology,Taiyuan030024,China;School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan030024,China
- 关键词:
- 纳米晶镁合金 AZ91 晶粒细化 力学性能
nanocrystalline magnesium alloy AZ91 grain refining mechanical properties
- 摘要:
- 通过氢化-歧化-脱氢-重组,结合放电等离子体烧结以及热挤压技术,获得了平均晶粒尺寸约15 nm的纳米晶镁合金块体。纳米晶AZ91镁合金棒材的力学性能表征显示其室温拉伸强度高达267 MPa,同时也表明当晶粒尺寸小于20 nm时纳米晶镁合金具有特殊的力学行为,证明了一种反Hall-Petch关系的存在。
Nanocrystalline magnesium alloy bulks with an average grain sizes about 15 nm were obtained by hydrogenation-disproportionation-dehydrogenation-recombination,spark plasma sintering and hot extrusion.The mechanical properties of nanocrystalline AZ91 magnesium alloy bar show that its tensile strength is up to 267 MPa at room temperature.It is also show that nanocrystalline magnesium alloys have special mechanical behavior when the grain size is less than 20 nm,which proves the existence of an anti-Hall-Petch relationship.