采用光学显微镜和透射电镜研究了室温下高纯铝(纯度99.999 5%)经不同道次等通道变形后的显微组织,并对其进行了拉伸性能测试.结果表明:等通道变形可使高纯铝的晶粒显著细化,并出现了动态回复和动态再结晶;2道次等通道变形后,高纯铝的屈服强度和抗拉强度达到最大,分别为25.68 MPa和61.61 MPa,随后出现了应变软化并最终趋向一个定值;1道次后伸长率最小(35.88%),而后逐渐增大,12道次后又接近于退火态的伸长率(63.80%);应变软化现象与高纯铝在等通道变形中发生动态回复和动态再结晶有关.
所属栏目
江苏省国际科技合作资助项目(BZ2006018);常州市科技资助项目(CZ2006008)
收稿日期
2007/7/112007/11/9
作者单位
刘国心:江苏工业学院材料科学与工程系, 江苏 常州 213164
魏伟:江苏工业学院材料科学与工程系, 江苏 常州 213164
魏坤霞:江苏工业学院材料科学与工程系, 江苏 常州 213164
备注
刘国心(1979-),男,山东菏泽人,硕士研究生.
引用该论文:
LIU Guo-xin,WEI Wei,WEI Kun-xia.Microstructure and Mechanical Properties of High Purity Aluminum Processed by Equal Channel Angular Pressing[J].Materials for mechancial engineering,2008,32(6):66～69
刘国心,魏伟,魏坤霞.等通道变形高纯铝的显微组织与力学性能[J].机械工程材料,2008,32(6):66～69
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