Fe-3%Si单晶Ⅱ型试样的氢致开裂

中国腐蚀与防护学报

1987, Vol. 7

Issue (1): 19-26

研究报告

本期目录 | 过刊浏览

Fe-3%Si单晶Ⅱ型试样的氢致开裂

张统一;褚武扬;马仁燕;肖纪美

北京钢铁学院;北京钢铁学院;北京钢铁学院;北京钢铁学院

HYDROGEN INDUCED CRACKING IN Fe-3％Si SINGLE CRYSTALS UNDER MODE Ⅱ LOADING

Zhang Tongyi Chu Wuyang Ma Renyan Xiao Chimei (Beijing University of Iron and Steel Technology)

全文: PDF(2844 KB)

摘要: 研究了Fe-3％Si单晶Ⅱ型试样在恒载荷动态充氢条件下的氢致开裂。结果表明:当拉伸轴为[001]和[(?)10]方向时。归一化氢致开裂门槛值KⅡ_H/KⅡ_x有极小值;而当拉伸轴在[(?)11)向附近时,KⅡ_H/KⅡ_x取极大值。氢致开裂都是沿(001)面的解理断口,但在空气中则可获得韧窝断口。这说明氢促进了Fe-3％Si的解理断裂。另外,观察到氢致二次裂纹的两边平面可以发生上下、前后的错动,这表明在氢致解理开裂过程中发生了严重的氢致滞后塑性变形。从氢助塑性的观点讨论了氢促进解理断裂的原因。

Abstract：Hydrogen induced cracking in Fe-3％ Si single crystals under mode Ⅱ loading was investigated. The results showed that hydrogen could promote cleavage fracture occurring on a(001)plane, no matter what the orientation, of tensile loading axis was, and if it was along a[001] or [T10] direction the normalized threshold stress intensity K_(ⅡH)/K_(ⅡX) had a minimum value while the maximum value was obtained when the tensile loading axis was nearly along [T11]。Some hydrogen induced secondary cracks were found in which there were evident relative displacements normal or/and parallel to the cracking direction on both sides of the secondary crack。This is due to the unequal number of screw and/or edge dislocations slipping out or in both sides of the secondary crack, i. e. severe local plastic deformaton occurs during hydrogen induced cleavage cracking.The reason for hydrogen promoting cleavage cracking was discussde。

收稿日期: 1987-02-25

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引用本文:

张统一;褚武扬;马仁燕;肖纪美. Fe-3%Si单晶Ⅱ型试样的氢致开裂[J]. 中国腐蚀与防护学报, 1987, 7(1): 19-26.
. HYDROGEN INDUCED CRACKING IN Fe-3％Si SINGLE CRYSTALS UNDER MODE Ⅱ LOADING. J Chin Soc Corr Pro, 1987, 7(1): 19-26.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1987/V7/I1/19

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