| 高氮奥氏体钢低温脆断中的三种断裂刻面 |
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| 引用本文： | 王莎莎,陈汝淑,刘德义,刘世程,魏文杲.高氮奥氏体钢低温脆断中的三种断裂刻面[J].理化检验(物理分册),2007,43(3):117-120. |
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| 作者姓名： | 王莎莎 陈汝淑 刘德义 刘世程 魏文杲 |
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| 作者单位： | 1. 大连交通大学材料科学与工程学院,大连,116028
2. 大连职业技术学院,大连,116035 |
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| 摘 要： | 用扫描电镜对18Cr-18Mn-0.7N高氮奥氏体钢低温脆断中裂纹的形成、扩展及断面进行了分析.结果表明,低温脆断中,首先沿退火孪晶界及晶界形成微裂纹,微裂纹穿晶连接使裂纹扩展,其结果导致断口上形成三种断裂刻面,即光滑平面状退火孪晶界断裂刻面、光滑曲面状沿晶断裂刻面及粗糙不平的穿晶断裂刻面.
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| 关 键 词： | 高氮奥氏体钢 低温脆断 裂纹形成与扩展 断裂刻面 |
| 文章编号： | 1001-4012（2007）03-0117-04 |
| 收稿时间： | 2006-10-18 |
| 修稿时间： | 2006-10-18 |
THREE KINDS OF FRACTURE FACET OF A HIGH NITROGEN BEARING AUSTENITIC STEEL IN LOW TEMPERATURE BRITTLE FRACTURE |
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| WANG Sha-sha,CHEN Ru-shu,LIU De-yi,LIU Shi-cheng,WEI Wen-gao.THREE KINDS OF FRACTURE FACET OF A HIGH NITROGEN BEARING AUSTENITIC STEEL IN LOW TEMPERATURE BRITTLE FRACTURE[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2007,43(3):117-120. |
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| Authors: | WANG Sha-sha CHEN Ru-shu LIU De-yi LIU Shi-cheng WEI Wen-gao |
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| Affiliation: | 1.School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China;2.Dalian Vocational Technology College, Dalian 116035, China |
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| Abstract: | Crack initiation and propagation and fracture surfaces in low temperature brittle fracture of an 18Cr-18Mn-0.7N high nitrogen bearing austenitic steel were studied by means of scanning electronic microscopy.In the fracture,micro crack initiated at grain boundary and annealing twin boundary.Then the cracks propagated by coalesce through grain.As a result,three kinds of fracture facet exhibited on the fracture surface,i.e.,smooth and flat facet,smooth curved facet and very rough facet,induced by annealing twin boundary cracking,intergranular cracking and transgranular cracking,respectively. |
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| Keywords: | High nitrogen bearing austenitic steel Brittle fracture at low temperatures Crack initiation and propagation Fracture facet |
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