| TiAl基合金层状组织中裂纹扩展区的塑性变形 |
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| 引用本文： | 张继,张建伟,邹敦叙,仲增墉,张志宏,曾梅光.TiAl基合金层状组织中裂纹扩展区的塑性变形[J].材料科学与工程学报,1996(4). |
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| 作者姓名： | 张继 张建伟 邹敦叙 仲增墉 张志宏 曾梅光 |
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| 作者单位： | 冶金部钢铁研究总院，东北大学 |
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| 摘 要： | 本文通过观察ＴｉＡｌ合金层片组织四点弯曲试样侧面裂纹扩展与滑移迹线之间的关系，分析讨论了层状组织中塑性变形对裂纹扩展的影响。发现不论层片相对于裂纹处于何种取向，沿层片方向都有一定程度的塑性变形，这种变形对于平行、倾斜、垂直于片层扩展的主裂纹都可引起裂尖钝化，从而引发构成各种韧化机制
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| 关 键 词： | TiAl基合金、层状组织、裂纹扩展、塑性变形 |
The Process Zone Plastic Deformation in Lamellar Microstructure of a TiAl Alloy |
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| Zhang Ji Zhang Jianwei Zou Dunxu Zhong Zengyong Central Iron and Steel Research Institute,Beijing Zhang Zhihong Zeng Meiguang Northeastern University,Shenyang.The Process Zone Plastic Deformation in Lamellar Microstructure of a TiAl Alloy[J].Journal of Materials Science and Engineering,1996(4). |
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| Authors: | Zhang Ji Zhang Jianwei Zou Dunxu Zhong Zengyong Central Iron and Steel Research Institute Beijing Zhang Zhihong Zeng Meiguang Northeastern University Shenyang |
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| Affiliation: | Zhang Ji Zhang Jianwei Zou Dunxu Zhong Zengyong Central Iron and Steel Research Institute,Beijing 100081 Zhang Zhihong Zeng Meiguang Northeastern University,Shenyang 110006 |
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| Abstract: | The process zone plastic deformation on crack propagation in FL microstructure of a TiAl alloy was investigated through observing the deformation morphologies and microstructure around the crack on the side face of 4-point bending specimens.It was found that there always exist certain plastic deformation around and in front of crack.It's believed that the plastic deformation generated the crack-tip blunting and induced the extrinsic toughness. |
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| Keywords: | TiAl alloy FL microstructure plastic deformtion crack propagation |
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