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| THE CRITICAL STRESS OF FATIGUE CRACK INITIATION FOR MEDIUM CARBON STEEL |
| by LIN Jizhong; LIU Shuhua; WU Yushu; LI Yi (China Academy of Railway Sciences) (Manuscript received 22 April; 1986; revised manuscript 25 August; 1986) |
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Cite this article:
by LIN Jizhong; LIU Shuhua; WU Yushu; LI Yi (China Academy of Railway Sciences) (Manuscript received 22 April; 1986; revised manuscript 25 August; 1986). THE CRITICAL STRESS OF FATIGUE CRACK INITIATION FOR MEDIUM CARBON STEEL. Acta Metall Sin, 1987, 23(4): 339-340.
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Abstract Notch fracture machanics was used to investigate the fatigue crack initiation from the notch tip for medium carbon steels (0.4-0.6 wt-%C). The relationships between the maximum stress range at the notch root, △σ_(max), and the number of cycles before fatigue crack initiation, N_i, have been determined. Furthermore, the threshold stress of fatigue crack initiation, △σ_(max)th, as a function of C content or of yield strength of the steel has been proposed.
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Received: 18 April 1987
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