镁合金单轴拉伸微蠕变测量系统
SINGLE AXLE TENSILE MEASUREMENT SYSTEM OF MICROCREEP FOR MAGNESIUM ALLOY
摘 要
为了准确测出镁合金抗微蠕变性能,采用单轴拉伸法对镁合金进行室温蠕变试验,开发了镁合金微蠕变测量系统,解决了测量微蠕变关键技术问题,提出采用高精度位移传感器、恒温箱、测量放大器以及设计专用蠕变变形测量装置,构成镁合金微蠕变测试系统。试验结果表明,该系统精度高、性能稳定,可精确测试镁合金室温蠕变稳态速率和应变量,镁合金ZM6室温（35℃）下的蠕变应变为0.02%,最小稳态蠕变应变速率为10－10s-1。
单轴拉伸
微蠕变
蠕变试验机
Magnesium alloy
Single axle tensile test
Microcreep
Creep testing machine
Abstract
In order to improve microcreep resistance for magnesium alloy,room-ftemperature creep test for magnesium alloy used the single axle tensile method was researched,and the measurement system of creep testing machine was studied,and then technical method of micro-creep precise measurement for magnesium alloy was solved. High-accuracy displacement sensor,constant temperature cabinet,measurement amplifier and special creep deformation measurement mechanism were designed to compose the measurement system of microcreep for magnesium alloy. The tested results were that the system with high-accuracy and steady performance could accurately measure steady-state creep speed rate for magnesium alloy in room-temperature and strain capacity,and then micro-creep strain for magnesium alloy ZM6 was about 0.02% in the room-temperature(35℃),and its minimum steady-state creep strain speed rate was about 10-10s-1.
中图分类号 TG115.5+7,TH871.2
所属栏目 试验与研究
基金项目
收稿日期 2007/8/25
修改稿日期
网络出版日期
作者单位点击查看
备注李文瑛(1971-),女,工程师,硕士。
引用该论文: LI Wen-ying,XU Shu-fang,GUO Tian-cai,SHEN Feng. SINGLE AXLE TENSILE MEASUREMENT SYSTEM OF MICROCREEP FOR MAGNESIUM ALLOY[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2008, 44(7): 335～338
李文瑛,许树芳,郭天才,沈 枫. 镁合金单轴拉伸微蠕变测量系统[J]. 理化检验－物理分册, 2008, 44(7): 335～338
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参考文献
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【2】（苏）МД亨金,ИХ洛克申. 精密机械制造与仪器制造中金属与合金的尺寸稳定性[M]. 蔡安源,杜树芳,译. 北京: 科学出版社,1981．
【3】穆霞英.蠕变力学[M]. 西安: 西安交通大学出版社,1990．
【4】Tomoyasu Yamada,Kennshi Kawabata,Eiichisato,et al. Presences of primary creep in various phase metals and alloys at ambient temperature[J]. Materials Science and Engineering,2004,A(387-389):719-722．
【5】中国金属学会,中国有色金属学会.金属材料物理性能手册 第一册 金属物理性能及测试方法[M].北京:冶金工业出版社,1987:186-207．
【6】Ning Wang,Zhirui Wang,K T Aust,et al. Room temperature creep behavior of nanocrystalline nickel produced by an electrodeposition technique[J]. Materials Science and Engineering,1997,A(237):150-158．
【7】Hidetoshi Somekawa,Kinji Hirai,Hiroyuki Watanabe,et al. Dislocation creep behavior in Mg-Al-Zn alloys[J]. Materials Science and Engineering ,2005,A(407): 53-61．
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