新型钛合金材料疲劳寿命试验及预报方法研究  

Research on fatigue life test and forecast method of new titanium alloy materials

作　　者：李永正[1] 阮浩 王珂[1] 黄翔宇 LI Yong-zheng;RUAN Hao;WANG Ke;HUANG Xiang-yu(Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学,江苏镇江212100

出　　处：《船舶力学》2021年第11期1543-1550,共8页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51709134);国家重点研发计划项目(P2016YFC0300603-02);江苏省自然科学基金资助项目(BK20160559)。

摘　　要：为保障我国深海载人潜水器耐压壳结构安全性,本文针对耐压壳用新型钛合金的疲劳特性开展了不同应力水平下疲劳裂纹扩展门槛值试验以及疲劳寿命试验研究;获得了新型钛合金材料在载荷比R=0.1下的门槛值以及不同应力水平下该材料的疲劳寿命值;并基于断裂力学方法,对新型钛合金材料疲劳裂纹扩展行为进行了预报研究,将预报结果与相应试验结果进行了对比,从而验证预报方法的可行性和可靠性。In order to ensure the structural safety of the pressure hulls of deep-sea manned submersibles in China,the fatigue characteristics of a new type of titanium alloy for pressure hulls were studied in this paper.The threshold value of the new titanium alloy material under the load ratio R=0.1 and the fatigue life under different stress levels were obtained.Based on the fracture mechanics method,the fatigue crack growth behavior of the new titanium alloy was studied.The feasibility and reliability of the prediction method were verified by comparison of the prediction results with the corresponding test results.

关 键 词：新型钛合金材料 疲劳寿命试验 疲劳寿命预报 

分 类 号：TG111.8[金属学及工艺—物理冶金]