Abstract The study investigated the effect of high hydrostatic pressure on stress corrosion cracking (SCC) of Ti-6Al-4 V alloy in 3.5% NaCl solution at 2 °C, by slow strain rate testing at 0.1 MPa and20 MPa. The fractography exhibited a mixed fracture with small and shallow dimples, as well as cleavage and quasi-cleavage surfaces at the two pressures. High hydrostatic pressure enhances SCC of Ti-6Al-4 V alloy at 20 MPa, by facilitating the dissolution of titanium and decreasing the resistance of oxide film. The hydrostatic pressure also promotes the formation of δ hydrides at the α/β interface of Ti-6Al-4 V alloy.

中文翻译：

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静水压力对Ti-6Al-4V合金在3.5%NaCl溶液中应力腐蚀开裂影响的初步研究

摘要 通过0.1 MPa 和20 MPa 的慢应变速率试验，研究了高静水压力对Ti-6Al-4 V 合金在2 °C 3.5% NaCl 溶液中应力腐蚀开裂（SCC）的影响。断口显示混合裂缝，带有小而浅的凹坑，以及两种压力下的解理面和准解理面。高静水压力通过促进钛的溶解和降低氧化膜的电阻来提高 Ti-6Al-4 V 合金在 20 MPa 时的 SCC。静水压力也促进了 δ 氢化物在 Ti-6Al-4 V 合金的 α/β 界面处的形成。