梯度纳米结构钛管的拉-扭双轴疲劳行为研究  

Study on Biaxial Fatigue Behavior of the Gradient Nano-structured Titanium Tube

作　　者：吴宇坤 张帅锋 王启 孙志杰 张斌斌 蒋鹏[1] WU Yukun;ZHANG Shuaifeng;WANG Qi;SUN Zhijie;ZHANG Binbin;JIANG Peng(Luoyang Ship Materials Research Institute,Luoyang 471000,Henan,China)

机构地区：[1]洛阳船舶材料研究所,河南洛阳471000

出　　处：《焊管》2018年第12期1-8,共8页Welded Pipe and Tube

基　　金：国家自然科学青年基金"梯度组织结构Beta钛合金强韧化机制及疲劳损伤行为研究"(项目编号51701189)

摘　　要：为了对梯度纳米结构钛管的拉-扭双轴疲劳行为进行研究,利用表面纳米化技术制备了梯度纳米结构钛管,并对梯度纳米结构钛管的拉-扭双轴疲劳行为进行了相关试验,通过微观组织观察,对梯度纳米结构钛管的双轴疲劳损伤机制和微观组织演变规律进行了深入分析。试验结果显示,表面纳米化处理可以显著提高钛管的双轴疲劳寿命,为提高航天用钛管装备的服役安全性和可靠性提供理论指导。In order to study the tension-torsion biaxial fatigue behavior of the gradient nano-structured titanium tubes,the gradient nano-structured pure titanium tubes were prepared by surface nano-crystallization technology,and the tensile-twist biaxial fatigue behavior of gradient nano-structured titanium tubes was tested.The biaxial fatigue damage mechanism and microstructure evolution of gradient nano-structured titanium tubes were analyzed by microstructure observation.The experimental results show that surface nano-crystallization treatment could significantly improve the biaxial fatigue life of titanium tubes,and provide theoretical guidance for improving the service safety and reliability of aerospace titanium tube equipment.

关 键 词：钛管 梯度纳米结构 双轴疲劳 表面纳米化处理 

分 类 号：TG405[金属学及工艺—焊接]