304奥氏体不锈钢高温拉伸变形时的锯齿流变行为
Serrated Flow Behavior of 304 Austenitic Stainless Steel During High Temperature Tension Deformation
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773~973 K; 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212.8 kJ·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。
动态应变时效
激活能
锯齿流变行为
高温
304 austenitic stainless steel
dynamic strain aging
activation energy
serrated flow behavior
high temperature
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.
中图分类号 TL341
所属栏目 材料性能及其应用
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)
收稿日期 2011/7/1
修改稿日期 2012/3/15
网络出版日期
作者单位点击查看
备注王刚(1984-), 男, 河北保定人, 硕士研究生。
引用该论文: 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 mechancial engineering, 2012, 36(6): 64～67
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, 36(6): 64～67
被引情况:
【1】季波,沈寅忠,黄希, "11Cr铁素体/马氏体钢高温拉伸时的锯齿流变现象",机械工程材料 38, 33-36(2014)
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参考文献
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【3】A VAN DEN BEUKEL. Theory of the effect of dynamic strain aging on mechanical properties[J].Physica Status Solidi(a), 1975, 30: 197-206.
【4】ALMEIDA L H D E, MAY I L E, EMYGDIO P R O. Mechanistic modeling of dynamic strain aging in austenitic stainless steels[J].Materials Characterization, 1998, 41: 137-150.
【5】SAMUEL K G, MANNAN S L, RODRIGUEZ P. Serrated yielding in AISI 316 stainless steel[J].Acta Metallurgica, 1988, 36: 2323-2327.
【6】SAMUEL K.G, MANNAN S L, RODRIGUEZ P. Dynamic strain ageing in prior cold worked 15Cr-15Ni titanium modified stainless steel(Alloy D9)[J].Journal of Nuclear Materials, 2006, 355: 30-37.
【7】PENG Kai-ping, QIAN Kuang-wu, CHEN Wen-zhe. Effect of dynamic strain aging on high temperature properties of austenitic stainless steel[J].Materials Science and Engineering A, 2004, 379: 372-377.
【8】MENG L J, SUN J, XING H, et al. Serrated flow behavior in AL6XN austenitic stainless steel[J].Journal of Nuclear Materials, 2009, 394: 34-38.
<
参考文献原文>RODRIGUEZ P. Serrated plastic flow[J].Bulletin of Materials Science, 1984, 6: 653-663.
【9】CHEN W, CHATURVEDI M C. On the mechanism of serrated deformation in aged Inconel 718[J].Materials Science and Engineering A, 1997, 229: 163-168.
【10】BALLUFFI R W. On measurements of self-diffusion rates along dislocations in F.C.C. Metals[J].Physica Status Solidi(b), 1970, 42: 11-34.
【11】余宗森, 田中卓.金属物理[M].北京: 冶金工业出版社, 1982: 175.
【12】钱匡武, 李效琦, 萧林钢, 等.金属和合金中的动态应变时效现象[J].福州大学学报: 自然科学版, 2001, 29(6): 8-23.
【13】RODRIGUEZ P, VENKADESAN S.Serrated plastic flow revisited[J].Solid State Phenomena, 1995, 42/43: 127-266.
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