Acta Metallurgica Sinica (English Letters) ›› 1989, Vol. 2 ›› Issue (4): 269-273.

• Research paper • Previous Articles     Next Articles

HYDROGEN INDUCED CRACKING IN FERRITICAUSTENITIC DUPLEX STAINLESS STEEL

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   

  • Received:1989-08-25 Revised:1989-08-25 Online:1989-08-25 Published:2009-10-10

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