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初步研究了拉应力和合金成分对Ｔｉ８１１合金棒材热盐应力腐蚀（ＨＳＳＣ）性能的影响。结果表明：Ａｌ含量小于８．０ｗｔ％时，Ａｌ、Ｍｏ、Ｖ含量的变化对合金ＨＳＳＣ性能无明显影响；Ａｌ含量大于８．０ｗｔ％，随Ａｌ含量升高，ＨＳＳＣ性能明显下降，而Ｍｏ、Ｖ含量可改善其性能；当拉应力由１４７ＭＰａ升高到１９６ＭＰａ，ＨＳＳＣ性能明显降低。在实验基础上，提出了ＨＳＳＣ断裂模型，盐蚀区有Ｃｌ－，Ｎａ＋等存在，产生微裂纹，裂纹沿原β晶界扩展，最终导致断裂。
The effects of tensile stress and alloy composition on the properties of hot salt stress corrosion cracking (HSSC) of Ti811 alloy rod were studied preliminarily. The results show that the Al, Mo and V content have no significant effect on the properties of HSSC. When the content of Al is more than 8.0wt%, the properties of HSSC decrease obviously with the increase of Al content. However, V content can improve its performance; when the tensile stress increased from 147MPa to 196MPa, HSSC performance decreased significantly. Based on the experiment, the HSSC fracture model is proposed. Cl- and Na + exist in the salt eroded zone, and microcracks are generated. The crack propagates along the original β grain boundary and eventually leads to fracture.