材料工程Issue(10)：47-51,57,6.
TiNi形状记忆合金/不锈钢异种材料激光焊研究
Study on Laser Welding of Dissimilar Materials Between TiNi Shape Memory Alloy/Stainless Steel
摘要
Abstract
TiNi shape memory alloy and stainless steel wires were butt joined by laser welding with pure Ni interlayer. Microstructures and properties of joints with and without Ni interlayer were analyzed and discussed. The results showed that microstructures and properties of the joint with Ni interlayer were improved significantly compared with the joint without Ni interlayer. More γ-Fe phase and less intermetallic compounds such as TiFe2,TiCr2 were formed in the joint with Ni interlayer, which led to the decrease of weld microhardness and increase of joint strength. The joint strength without Ni interlayer was only 187MPa and the corresponding fracture surface exhibited a typical brittle feature. Using the Ni interlayer elevated joint strength to 372MPa and changed the joint fracture mode from pure brittle feature to mixture of cleavage and dimples.关键词
激光焊/TiNi形状记忆合金/不锈钢/微观组织/力学性能Key words
laser welding/TiNi shape memory alloy/stainless steel/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
李洪梅,孙大千,董鹏,王文权,殷世强..TiNi形状记忆合金/不锈钢异种材料激光焊研究[J].材料工程,2011,(10):47-51,57,6.基金项目
国家自然科学基金资助项目(50975112) （50975112）
