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有色金属工程:2024,(5)
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激光沉积TA15钛合金裂纹扩展行为研究
周松1, 于洪远1, 王洪明2
(1.沈阳航空航天大学机电工程学院;2.上海民航职业技术学院)
Study on crack propagation behavior of TA15 titanium alloy by laser deposition
Zhou Song1, Yu Hongyuan1, Wang Hongming2
(1.School of Mechanical and Electrical Engineering,Shenyang Aerospace University,Shenyang;2.Shanghai Civil Aviation College)
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投稿时间:2024-01-07    修订日期:2024-01-16
中文摘要: 采用标准CT试样测定了激光沉积TA15钛合金疲劳裂纹扩展速率,结合微观组织、裂纹扩展路径以及断口形貌分析疲劳裂纹扩展机理;并基于ABAQUS与FRANC 3D联合仿真的方法,模拟裂纹尖端应力强度因子并进行寿命预测。结果表明激光沉积制造态的裂纹扩展速率低于锻造态,裂纹主要穿过片状α相(),少量沿扩展,稳定扩展区清晰可见疲劳条纹,并伴随大量的二次裂纹,瞬断区为典型的韧性断裂。另一方面ABAQUS与FRANC 3D联合仿真计算的应力强度因子与理论值吻合较好,预测寿命相对误差低于5%,且证实了预测结果保守,验证了模拟分析的可靠性,确保了工程应用中的安全性。
Abstract:The fatigue crack growth rate of TA15 titanium alloy was measured by laser deposition using standard CT samples, and the fatigue crack growth mechanism was analyzed by combining the microstructure, crack propagation path and fracture morphology. Based on the method of ABAQUS and FRANC 3D co-simulation, the stress intensity factor of the crack tip was simulated and the life prediction was carried out. The results show that the crack propagation rate of the laser deposition manufacturing state is lower than that of the forging state, and the crack mainly passes through the lamellar α phase (αl), and a small amount propagates along the αl, and the fatigue fringes are clearly visible in the stable propagation zone, accompanied by a large number of secondary cracks, and the instantaneous fracture zone is a typical ductile fracture. On the other hand, the stress intensity factor calculated by ABAQUS and FRANC 3D co-simulation is in good agreement with the theoretical value, and the relative error of the predicted life is less than 5%, which confirms the conservatism of the prediction results, verifies the reliability of the simulation analysis, and ensures the safety in engineering applications.
文章编号:YSJSGC20240015     中图分类号:TG115.5    文献标志码:
基金项目:国家自然科学基金(52105157);中国博士后科学基金(2023MD734242)。
引用文本:
周松,于洪远,王洪明.激光沉积TA15钛合金裂纹扩展行为研究[J].有色金属工程,2024,(5):.

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