화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.18, No.7, 394-400, July, 2008
고 Mn계 TRIP/TWIP 강의 수소취성 거동
Hydrogen Embrittlement Behavior of High Mn TRIP/TWIP Steels
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The hydrogen embrittlement susceptibility of high strength TRIP/TWIP steels with the tensile strength of 600Mpa to 900Mpa grade was investigated using cathodically hydrogen charged specimens. TWIP steels with full austenite structure show a lower hydrogen content than do TRIP steels. The uniform distribution of strong traps throughout the matrix in the form of austenite is considered beneficial to reduce the hydrogen embrittlement susceptibility of TWIP steels. Moreover, an austenite structure with very fine deformation twins formed during straining could also improve the ductility and reduce notch sensitivity. In Ubend and deep drawing cup tests, TWIP steels show a good resistance to hydrogen embrittlement compared with TRIP steels.
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