| 双相不锈钢中奥氏体相内裂纹扩展路径的透射电镜原位观察 |
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| 引用本文： | 姚可夫,唐迺泳,陈南平. 双相不锈钢中奥氏体相内裂纹扩展路径的透射电镜原位观察[J]. 金属学报, 1991, 27(2): 20-26 |
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| 作者姓名： | 姚可夫 唐迺泳 陈南平 |
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| 作者单位： | 北京科技大学材料科学与工程系，清华大学，清华大学 博士后 北京(100083) |
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| 基金项目： | 国家自然科学基金会资助项目 |
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| 摘 要： | 在透射电镜下原位观察了裂纹在双相不锈钢中的扩展过程。结果表明,裂纹在双相不锈钢中奥氏体晶粒内扩展时常呈较大的Z字形扩展路径。并且,在主裂纹前端奥氏体晶粒内形核的小裂纹与主裂纹有较强的交互作用,小裂纹尖端二次滑移系的选择和扩展路径为小裂纹尖端应力场和主裂纹尖端应力场共同支配。
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| 关 键 词： | 双相不锈钢 奥氏体 裂纹扩展路径 Z字形 |
| 收稿时间： | 1991-02-18 |
| 修稿时间： | 1991-02-18 |
IN SITU OBSERVATION ON CRACK PROPAGATING PATH IN AUSTENITE OF A DUPLEX STAINLESS STEEL |
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| YAO Kefu University of Science and Technology Beijing,TANG Naiyong,CHEN Nanping Tsinghua University,Beijing. IN SITU OBSERVATION ON CRACK PROPAGATING PATH IN AUSTENITE OF A DUPLEX STAINLESS STEEL[J]. Acta Metallurgica Sinica, 1991, 27(2): 20-26 |
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| Authors: | YAO Kefu University of Science Technology Beijing TANG Naiyong CHEN Nanping Tsinghua University Beijing |
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| Abstract: | The crack propagation in austenite phase of the ferrite-austenite duplexstainless steel, observed in situ under TEM, was found as zigzag path frequently.The main crack and the microcrack, nucleated in the austenite grain ahead of themain crack, caused an interaction. The choice of the secondary slip system at micro-crack tip and the propagating path of microcrack are controlled by the microcracktip stress field and the stress field of the main crack. |
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| Keywords: | austenite crack propagating path duplex stainless steel |
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