HYDROGEN INDUCED CRACKING IN FERRITICAUSTENITIC DUPLEX STAINLESS STEEL

Abstract

Abstract: Hydrogen induced cracking in a ferritic-austenitic duplex stainless steel has been investigated using compact tension tests.The stress intensity threshold K_H of the steel rises with increasing austenite content and decreases with increasing current density during hydrogen charging.The hydrogen induced cracking initiates and propagates on {100} planes of the ferrite grains.The austenite grains play a “fibre-toughened” role during obstructing crack propagation.

Key words: duplex stainless steel, hydrogen embrittlement, compact tension

HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University,Beijing,China Professor,Division of Metallic Materials,Dept.of Materials Science and Engineering,Tsinghua University,Beijing,China. HYDROGEN INDUCED CRACKING IN FERRITICAUSTENITIC DUPLEX STAINLESS STEEL[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(4): 269-273.

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HYDROGEN INDUCED CRACKING IN FERRITICAUSTENITIC DUPLEX STAINLESS STEEL

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