Acta Metall Sin  1994, Vol. 30 Issue (2): 79-84    DOI:

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STRESS CORROSION CRACKING OF 321 STAINLESS STEEL SINGLE CRYSTAL UNDER MODE Ⅱ LOADING

QIAO Lijie;SHE Dongling; LIU Hui; CHU Wuyang; XIAO Jimei(University of Science and Technology Beijing)

QIAO Lijie;SHE Dongling; LIU Hui; CHU Wuyang; XIAO Jimei(University of Science and Technology Beijing). STRESS CORROSION CRACKING OF 321 STAINLESS STEEL SINGLE CRYSTAL UNDER MODE Ⅱ LOADING. Acta Metall Sin, 1994, 30(2): 79-84.

Abstract References Related Articles Recommended Metrics Download:  PDF(459KB)  Export:  BibTeX | EndNote (RIS)       Abstract  SCC of 321 stainless steel(SS) single crystal was studied under mode II loading in a 42% boiling MgCl2 solution. The results shown that SCC initiated at the maximum normal stress site, while no SCC occurred at the maximum shear stress site. Although there were slip lines around the maximum normal site, most of SCC did not occur along the slip lines. Some micro-cracks could be observed on the slip lines using scanning electron microscope , but cracking direction was inclined about 20 degrees to the slip line and these microcracks did not propagate. The slip lines could appear owing to heat activation when a polished constant displacement specimen was heated at 150℃ for 2 h. The slip lines appeared during heating were polished before SCC experiment, SCC still initiated at the maximum site while no slip step emergence on the specimens. Those results are conflict with the″slip－dissolution ″ model of SCC. The SCC mechanism of austenitic stainless steel may be relative with the stress concentration due to dislocation pile－up, but not with slip steps. The normal stress plays an important part in the SCC.QIAO Lijie, associate professor,(Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083) Key words:  stress corrosion cracking      austenitic stainless steel      steel lCr18Ni9Ti single crystal      Received:  18 February 1994      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1994/V30/I2/79 1ChuWY,WangHL,HsiaoCM．Corrosion,1984;40:4872QiaoLJ,ChuWY,HsiaoCM,LuJD．Corrosion,1988;44:503乔利杰,褚武扬,肖纪美．金属学报,1988;24(Suppl．I):SA2054ChuWY,YaoJ,HsiaoCM．Corrosion,1984;40:3025StaehleRW．In:ScullyJEed．,TheTheoryofStressCorrosionCrackinginAlloys,NATO,Brussels,1971:2236StrohAN,ProcRoySoc,1955;232A:5487YangL,HorneGT,PouneGM,PhysicalMetallurgyofStressCorrosionFracture．NewYork:AIME,1959:298DeanSWJr．ASTMSTP610,1976:3089肖纪美．不锈钢的金属学问题．北京:冶金工业出版社,1983:34610陈奇志,褚武扬,肖纪美．中国科学待发表11乔利杰,缪辉俊,褚武扬,肖纪美,郭培新．中国科学,1991;A(11):1218. 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