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arXiv · 1606.09474

The role of crystallographic orientation of martensitic variants on cleavage crack propagation

Arya Chatterjee·A. Ghosh·A. Moitra·A. K. Bhaduri·R. Mitra·D. Chakrabarti
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Abstract

Cleavage crack propagation has been investigated in a low-carbon lath-martensitic steel using electron back-scattered diffraction technique. The ability of different martensitic boundaries within prior-austenite grain, such as sub-block, block and packet boundaries to resist cleavage crack propagation has been estimated in terms of Kurdjumov-Sachs crystallographic variants. Crystallographic study of crack path indicated that block boundaries are more effective in cleavage crack deviation as compared to packet boundaries, whilst sub-block boundaries are ineffective in that respect. Moreover, characterizing the boundaries in terms of misorientation angle (angle-axis pair) may be misleading if their effectiveness in retarding cleavage crack propagation is considered.

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Arya Chatterjee, A. Ghosh, A. Moitra, A. K. Bhaduri, R. Mitra, D. Chakrabarti. 2016-06-30. The role of crystallographic orientation of martensitic variants on cleavage crack propagation. https://arxiv.org/abs/1606.09474

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