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author:

戴品强 (戴品强.) [1] | 何则荣 (何则荣.) [2]

Abstract:

<正>在透射电镜中进行动态拉伸、原位观察40Cr调质钢裂纹萌生与扩展过程。结果发现:调质钢断裂时, 裂尖前方首先发射位错,并向前运动,平衡时形成无位错区和反塞积位错群。裂尖前方的渗碳体会阻碍位错的运动。渗碳体与基体界面可以发射位错,使界面附近基体减薄,导致纳米级微孔洞的萌生。微孔洞边缘存在若干个微裂尖,继续拉抻,微裂尖发射位错。微空洞通过微裂尖的连续扩展而长大,最终与主裂连接。

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  • [ 1 ] 福州大学材料科学与工程学院

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Year: 2006

Language: Chinese

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 5

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