IN SITU OBSERVATION ON CRACK PROPAGATING PATH IN AUSTENITE OF A DUPLEX STAINLESS STEEL

Acta Metall Sin

1991, Vol. 27

Issue (2): 20-26 DOI:

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IN SITU OBSERVATION ON CRACK PROPAGATING PATH IN AUSTENITE OF A DUPLEX STAINLESS STEEL

YAO Kefu University of Science and Technology Beijing; TANG Naiyong; CHEN Nanping Tsinghua University; Beijing

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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. Acta Metall Sin, 1991, 27(2): 20-26.

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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.

Key words: austenite crack propagating path duplex stainless steel

Received: 18 February 1991

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1991/V27/I2/20

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