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| EFFECT OF STRESS AND INCLUSION ON HYDROGEN BLISTERING |
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| 北京科技大学 |
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Cite this article:
;. EFFECT OF STRESS AND INCLUSION ON HYDROGEN BLISTERING. Acta Metall Sin, 2006, 42(8): 815-819 .
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Abstract The effect of applied stress and inclusion on hydrogen blistering in wheel steel has been investigated. The results show that the critical current density for forming blistering during charging under sustained stress is the same with that of the sample without stress, and the critical diffusible hydrogen concentration for forming blistering under sustained stress,Cσ* is located within the scatter interval of C0* for the sample without stress. t test shows that there is no effect of the stress on C0*. However the threshold current density and diffusible hydrogen concentration for hydrogen-induced delayed fracture under sustained stress are ith=3mA/cm2 and Cth=0.52×10-6, respectively, which are smaller than the corresponding values for forming hydrogen blistering, i.e., ic=5mA/cm2 and C0*=1.18×10-6 . Hydrogen blistering do not preferentially form along the inclusions for the samples without stress, however, the blistering preferentially form along the lengthened inclusion under sustained stress, resulting in decreasing C0* from 1.18×10-6 for the samples without stress to 0.56×10-6 in the sample containing lengthen inclusion under sustained stress.
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Received: 26 October 2005
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