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HYDROGEN INDUCED CRACKING IN FERRITICAUSTENITIC DUPLEX STAINLESS STEEL |
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| Authors: | HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University Beijing China Professor Division of Metallic Materials Deptof Materials Science and Engineering Tsinghua University Beijing China |
| 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. |
| Keywords: | duplex stainless steel hydrogen embrittlement compact tension |
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