Elevated temperature endurance and creep properties of extruded 2D70 Al alloy rods

查看全文 作　　者：WANG [1,2]Guojun;XIONG [1]Baiqing;ZHANG Yong'[1]an;LI [1]Zhihui

机构地区：[1]State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 100088, China;[2]Northeast Light Alloy Co. Ltd., Harbin 150060, China

出　　处：《Rare Metals》索引2011年第30卷第3期,共6页

基　　金：support from the National Key Technology Research and Development Program of China (No.2007BAE38B06);Heilongjiang Province Science Fund for Distinguished Young Scholars(No. JC201013) 摘　　要：The elevated temperature performances of 2D70 Al alloy hot extrusion rods after two-stage homogenization and intensive deformation were studied by measuring the elevated temperature enduring strength and the creep ultimate strength. The fracture morphology of some selected samples after testing at different elevated temperatures was observed by scanning electron microscopy (SEM). The results indicate that, as the test temperature increases, the elevated temperature enduring strength of 2D70 Al alloy decreases gradually. In a comparison between 150 C and 240 C, the notch enduring strength drops from 375 to 185 MPa and the smooth enduring strength drops from 337 to 130 MPa. Enduring strength is not sensitive to the notch. The notch sensitivity ratio (NSR) coefficient is in the range of 1.119 to 1.423 from 150 C to 240 C. The creep test results show that, as the test temperature increases from 150 C to 240 C, the creep ultimate strength of 2D70 Al alloy rods drops gradually from 312 to 117 MPa. 关键词：抗蠕变性能高温性能铝合金挤压棒高温持久强度缺口敏感性扫描电子显微镜测试温度

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Elevated temperature endurance and creep properties of extruded 2D70 Al alloy rods

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