表面粗糙度对氧化物弥散强化钢板高温蠕变性能的影响
Effect of surface roughness on high temperature creep property of oxide dispersion-strengthened steel plate
摘 要
采用高温原位疲劳试验机对氧化物弥散强化（ODS）钢板进行高温蠕变试验，分析了表面粗糙度对ODS钢板高温蠕变性能的影响。结果表明：随着表面粗糙度的减小，ODS钢板的稳态蠕变速率减小，蠕变寿命延长，试验后钢板表面裂纹数量减少；ODS钢板表面裂纹是由其表面纵向分布的划痕与横向分布的滑移线相互作用形成的，随着时间的延长，裂纹扩展、相互连接，最终导致钢板断裂。
ODS钢
高温蠕变
surface roughness
ODS steel
high temperature creep
Abstract
The high temperature creep test of oxide dispersion-strengthened (ODS) steel plate was carried out by high temperature in-situ fatigue testing machine, and the influence of the surface roughness on the high temperature creep performance of ODS steel plate was analyzed. The results showed that with the decrease of surface roughness, the steady-state creep rate of ODS steel plate decreased, the creep life extended, and the number of surface cracks of steel plate after test decreased. The surface cracks of ODS steel plate were formed by the interaction of the longitudinally distributed scratches on the surface and the laterally distributed slip lines. With the extension of time, the cracks propagated and connected to each other, eventually caused steel plate to break.
中图分类号 TL341 DOI 10.11973/lhjy-wl202201001
所属栏目 试验与研究
基金项目
收稿日期 2021/1/27
修改稿日期
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备注齐海东(1993-),男,博士研究生,主要从事金属材料力学性能研究工作,18712853230@163.com
引用该论文: QI Haidong,MEI Jianyuan,SONG Xiping,ZHANG Bei. Effect of surface roughness on high temperature creep property of oxide dispersion-strengthened steel plate[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2022, 58(1): 1～4
齐海东,梅健远,宋西平,张蓓. 表面粗糙度对氧化物弥散强化钢板高温蠕变性能的影响[J]. 理化检验－物理分册, 2022, 58(1): 1～4
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参考文献
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【5】SEILS S,KAUFFMANN A,HINRICHS F,et al.Temperature dependent strengthening contributions in austenitic and ferritic ODS steels[J].Materials Science and Engineering:A,2020,786:139452.
【6】JAUMIER T,VINCENT S,VINCENT L,et al.Creep and damage anisotropies of 9%Cr and 14%Cr ODS steel cladding[J].Journal of Nuclear Materials,2019,518:274-286.
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