| 304奥氏体不锈钢高温拉伸变形时的锯齿流变行为 |
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| 引用本文： | 王刚,李志刚,韩鹏程,沈寅忠. 304奥氏体不锈钢高温拉伸变形时的锯齿流变行为[J]. 机械工程材料, 2012, 0(6): 64-67 |
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| 作者姓名： | 王刚 李志刚 韩鹏程 沈寅忠 |
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| 作者单位： | 上海交通大学核科学与工程学院;上海交通大学材料科学与工程学院 |
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| 基金项目： | 国家大型先进压水堆核电站重大专项课题项目(2010ZX06004009) |
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| 摘 要： | 对304奥氏体不锈钢进行拉伸试验,研究了其在高温拉伸变形过程中的锯齿流变行为。结果表明:当应变速率在2×10-4～2×10-3s-1范围内,试验钢发生动态应变时效的温度为773～973K;出现了A、A+B和E三种锯齿波和负的应变速率敏感系数;锯齿形成的有效激活能为212.8kJ.mol-1;铬和锰等置换型溶质原子与运动位错的交互作用使试验钢出现动态应变时效,导致锯齿流变行为的产生。
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| 关 键 词： | 304奥氏体不锈钢 动态应变时效 激活能 锯齿流变行为 高温 |
Serrated Flow Behavior of 304 Austenitic Stainless Steel During High Temperature Tension Deformation |
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| WANG Gang,LI Zhi-gang,HAN Peng-cheng,SHEN Yin-zhong. Serrated Flow Behavior of 304 Austenitic Stainless Steel During High Temperature Tension Deformation[J]. Materials For Mechanical Engineering, 2012, 0(6): 64-67 |
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| Authors: | WANG Gang LI Zhi-gang HAN Peng-cheng SHEN Yin-zhong |
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| Affiliation: | 1(1.School of Nuclear Science and Engineering; 2.School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | Tensile test was performed to 304 austenitic stainless steel,and the serrated flow behavior during high temperature tension deformation was studied.The results show that the temperature for happing dynamic strain aging was 773-973 K when the strain rate within the range of 2×10-4 to 2×10-3 s-1.The typed of A,A+B and E serrated wave and negative strain rate sensitivity coefficient appeared,and the effective activation energy for forming serration was 212.8 kJ·mol-1.The dynamic strain aging happening for the tested steel was because of the interaction between substitutional atoms(Cr,Mn and so on) and moving dislocations,and then caused serrated flow behavior happening. |
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| Keywords: | 304 austenitic stainless steel dynamic strain aging activation energy serrated flow behavior high temperature |
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