为了研究尺度效应及热处理工艺对新型钛合金材料疲劳性能的影响，本文对新型钛合金母材及焊接结构在不同尺度效应和热处理工艺下的力学性能和疲劳性能开展试验，分析尺度效应和热处理工艺对新型钛合金材料疲劳性能的影响规律。研究结果表明，仅经过低温热处理的新型钛合金焊接结构疲劳寿命要超过经过高温-低温热处理后的焊接接头近1.53倍；尺度效应对焊接结构的力学性能影响较大，对母材影响较小；随着尺度增大新型钛合金的裂纹扩展寿命增大，但裂纹扩展速率并无明显变化。
In order to study the scale effect and heat treatment process on the fatigue properties of new titanium alloy materials, this paper on the new titanium alloy base material and welded structure in different scale effect and heat treatment process of the mechanical properties and fatigue properties of the experimental research, analysis of the scale effect and heat treatment process on the new titanium alloy material fatigue properties of the law. The results show that only after low-temperature heat treatment of the new titanium alloy welded structure fatigue life to exceed after high-temperature - low-temperature heat treatment of the welded joint nearly 1.53 times; scale effect on the mechanical properties of the welded structure has a greater impact on the base material has a smaller impact; as the scale increases the new titanium alloy crack extension life increases, but the crack extension rate does not change significantly.
2024,46(5): 43-47 收稿日期：2023-03-16
DOI：10.3404/j.issn.1672-7649.2024.05.008
分类号：U668.1
作者简介：袁青松(1995-),男,硕士,研究方向为船舶与海洋结构物结构性能
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