Ti55钛合金双激光焊接T型接头组织与力学性能研究
Study on Microstructure and Mechanical Properties of Ti55 Titanium Alloy Double Laser Welding T-joint
史吉鹏 1刘艳梅 1关峰 1蒋文通 1张增光1
作者信息
- 1. 沈阳飞机工业(集团)有限公司,辽宁 沈阳 110850
- 折叠
摘要
对 1.5⊥1.5 mm的Ti55 钛合金T型接头进行了双激光焊接试验,观察了接头的宏观形貌,分析了接头不同区域的组织结构,以及接头的高温拉伸性能和常温剪切性能.结果表明:Ti55 钛合金T型接头焊缝表面成形较好,横截面没有焊接缺陷.从接头母材区域到熔合区,接头的晶粒尺寸逐渐增大,β相含量逐渐减少,α与α'相含量逐渐增多.随着拉伸温度的升高,T型接头的抗拉强度逐渐降低,而伸长率逐渐升高.接头去除立筋后的剪切性能比母材高 3.3%.
Abstract
The double laser welding test was carried out for the 1.5⊥1.5 mm T-joint of Ti55 titanium alloy.The macroscopic morphology of the joint was observed,the microstructure of different regions of the joint and the high-temperature tensile properties and room-temperature shear properties of the joint were analyzed.The results show that the weld surface forming of the Ti55 titanium alloy T-joint is good and there is no welding defect in the cross section.From the base metal region of the joint to the fusion zone,the grain size of the joint gradually increases,the content of β phase gradually decreases,and the content of α and α'phases gradually increases.With the increase of the tensile temperature,the tensile strength of the T-joint gradually decreases,while the elongation increases gradually.The shear performance of the joint after removing the rib is 3.3%higher than that of the base metal.
关键词
Ti55钛合金/T型接头/激光焊接/微观组织/力学性能Key words
Ti55 titanium alloy/T-joint/laser welding/microstructure/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据