• Volume 30 Issue 5
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    SHI Dongmei, LI Jinxu, GAO Kewei, QIAO Lijie. Crack initiation time determined by tapered round specimens[J]. Chinese Journal of Engineering, 2008, 30(5): 501-503,521. doi: 10.13374/j.issn1001-053x.2008.05.012
    Citation: SHI Dongmei, LI Jinxu, GAO Kewei, QIAO Lijie. Crack initiation time determined by tapered round specimens[J]. Chinese Journal of Engineering, 2008, 30(5): 501-503,521. doi: 10.13374/j.issn1001-053x.2008.05.012

    Crack initiation time determined by tapered round specimens

    doi: 10.13374/j.issn1001-053x.2008.05.012
    • Received Date: 2007-03-09
    • Rev Recd Date: 2007-10-23
    • Available Online: 2021-08-06
    • In order to ascertain the contribution of crack nucleation process in fracture, round tapered specimens of 304 stainless steel were used to determine the initiation time of stress corrosion cracking in boiling 42% MgCl2 solution. The results showed that the relation of the time to nucleation of stress corrosion cracking (SCC) to the applied stress obeyed ti=4310exp(-0.0097δ); however, the relation of the time to fracture to the applied stress was tf=6964exp(-0.0095δ). It was indicated that the majority of fracture process consisted of crack initiation. The fracture surface was related to the applied stress. The transgranular SCC area decreased with the increase in applied stress.

       

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