| 热老化对Z3CN20-09M不锈钢微区力学性能和冲击断裂行为的影响 |
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| 引用本文： | 李时磊,王西涛,王艳丽,李树肖.热老化对Z3CN20-09M不锈钢微区力学性能和冲击断裂行为的影响[J].金属学报,2011(6). |
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| 作者姓名： | 李时磊 王西涛 王艳丽 李树肖 |
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| 作者单位： | 北京科技大学新金属材料国家重点实验室; |
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| 基金项目： | 国家高技术研究发展计划资助项目2008AA031702~~ |
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| 摘 要： | 通过纳米力学探针对铁素体相在热老化过程中的力学性能变化进行了研究.采用仪器化冲击试验机研究了材料的冲击行为,使用SEM观察冲击断口形貌.结果表明:长期热老化导致铁素体相的塑性变形能力不断下降,材料的冲击韧性也显著下降.热老化过程中冲击功的损失主要是由于裂纹扩展能量的降低引起,在400℃热老化1×10~4h后裂纹稳定扩展能几乎降为0.热老化材料的冲击断裂过程为:在冲击载荷下裂纹首先在铁素体内萌生并快速扩展,铁素体相发生解理断裂,裂纹扩展到奥氏体相,最后裂纹连接贯穿整个试样.
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| 关 键 词： | Z3CN20-09M不锈钢 热老化 冲击 断裂行为 力学性能 |
EFFECTS OF THERMAL AGING ON MICRO-MECHANICAL PROPERTIES AND IMPACT FRACTURE BEHAVIOR OF Z3CN20-09M STAINLESS STEELS |
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| LI Shilei,WANG Xitao,WANG Yanli,LI Shuxiao State Key Laboratory for Advanced Metals , Materials,University of Science , Technology Beijing,Beijing.EFFECTS OF THERMAL AGING ON MICRO-MECHANICAL PROPERTIES AND IMPACT FRACTURE BEHAVIOR OF Z3CN20-09M STAINLESS STEELS[J].Acta Metallurgica Sinica,2011(6). |
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| Authors: | LI Shilei WANG Xitao WANG Yanli LI Shuxiao State Key Laboratory for Advanced Metals Materials University of Science Technology Beijing Beijing |
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| Affiliation: | LI Shilei,WANG Xitao,WANG Yanli,LI Shuxiao State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083 |
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| Abstract: | Cast austenite stainless steels(CASS)were used in the primary circuit piping of pressurized water nuclear reactors(PWRs),because of their excellent strength,corrosion resistance and good weldability.However,after long-term service at mid-temperature,CASS would suffer a loss of toughness and Charpy impact energy due to thermal aging.The micro-mechanical properties and impact fracture behavior of Z3CN20-09M stainless steel after long-term thermal aging at intermediate temperature were studied in this paper.A ... |
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| Keywords: | Z3CN20-09M stainless steel thermal aging impact fracture behavior mechanical property |
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