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采用了两种不同的充氢方法(浸泡充氢和高压气相热充氢)研究了氢对断口上颗粒状亮区(Granular Bright Facet/GBF)尺寸的影响。研究表明,浸泡充氢并没有改变“GBF”的颗粒状特征,高压气相热充氢使得“GBF”的颗粒状特征变浅甚至消失。不论哪种充氢方法,充氢均使得“GBF”在较低的外加载荷下出现,且与充氢前相比“GBF”尺寸明显增加。电化学充氢没有改变疲劳寿命与(SGBF)1/2/(Sinc)1/2之间的关系,但是高压气相热充氢后疲劳寿命与(SGBF)1/2/(Sinc)1/2之间的关系有显著变化。
Two different hydrogen charging methods (immersion hydrogen charging and high-pressure gas-phase thermal hydrogen charging) were used to study the effect of hydrogen on the size of the granular bright facet (GBF) at the fracture. The results show that the immersion charge of hydrogen does not change the granular features of “GBF”, and the high temperature hydrogen charging makes the granular features of “GBF” shallow or even disappear. Regardless of the hydrogen charging method, hydrogen charging makes “GBF” appear under lower applied load, and the size of “GBF” obviously increases compared with that before hydrogen charging. Electrochemical hydrogen charging did not change the relationship between fatigue life and (SGBF) 1/2 / (Sinc) 1/2, but the fatigue life after high-pressure gas-phase hydrothermal charging was related to (SGBF) 1/2 / The relationship between the significant changes.