材料科学与工程学报2017，Vol.35Issue(5)：836-840,5.DOI:10.14136/j.cnki.issn 1673-2812.2017.05.029
低温对TC4脉冲激光焊接接头组织和性能的影响
Effect of Low Temperature on the Microstructure and Mechanical Properties of Pulsed Nd∶YAG Laser Welding for TC4 Titanium Sheet
摘要
Abstract
To study the influence of low temperature on the microstructure and mechanical properties of pulsed Nd∶YAG laser welded TC4 alloy sheets,the tensile tests at the temperatures ranging from-120℃ to 25℃ were carried out,and the specimens after tensile fracture were examined by scanning electron microscopy.Experimental results show that the microstructure of pulsed laser welded TC4 joint varies little under the low temperature.With the decrease of temperature,the tensile strength and ductility of pulsed laser welded TC4 joint increases and decreases,respectively.The mode of failure for pulsed laser welded TC4 joints is ductile with microvoid coalescence under low temperature conditions.In addition,the slip bands are observed in the α phase of base metal for pulsed laser welded TC4 joints during low temperature tensile process,indicating that the deformation mechanism is still the dislocation slip.关键词
TC4钛合金/脉冲激光焊接/低温/组织和力学性能Key words
TC4 titanium alloy/pulsed laser welding/low temperature/microstructure and mechanical properties分类
矿业与冶金引用本文复制引用
高晓龙,李海军,刘晶,毕宗岳,李远征..低温对TC4脉冲激光焊接接头组织和性能的影响[J].材料科学与工程学报,2017,35(5):836-840,5.基金项目
宝鸡文理学院校级重点资助项目(ZK2017047,ZK16045) （ZK2017047,ZK16045）
