Laser Welding,Microwelding,Nanowelding and Nanoprocessing(Invited Paper)

作     者：A. Hu S. K. Panda M. I. Khan Y. Zhou 

作者机构：Department of Mechanical and Mechatronics EngneeringUniversity of Waterloo200 University Avenue WestONN2V 2V6Canada Department of Mechanical EngineeringIndian Institute of Technology-KharagpurKharagpur 721302India 

出 版 物：《中国激光》 (Chinese Journal of Lasers)

年 卷 期：2009年第36卷第12期

页      面：3149-3159页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0803[工学-光学工程] 

基　　金：supported by the National Centre of Excellent (NCE)through Auto21 Natural Science and Engineering Research Council(NSERC)of Canada and the Canada Research Chair(CRC) 

主　　题：材料加工技术 激光技术 纳米粒子 焊接强度 

摘      要：Laser has been widely applied for advanced material processing,such as welding of advanced high strength steels(AHSS) for automotive applications and Pt,Ti,and Nitinol alloys for medical ***,ultrafast pulse laser,especially femtosecond laser,is identified as powerful tools for joining and surface engineering of *** paper reviews our research on these fields at the Centre of Advanced Materials Joining,University of *** conclusions are listed for laser material processing at three continuing scales.1) For AHSS welding,a thin Al layer can dramatically enhanced the weldability of galvannealed *** movement of the welding line and softening in the vicinity has significantly influence on global mechanical properties in dual phase(DP) and transformation induced plasticity(TRIP) *** increase of the strength ratio decreases the formability and results in the non-uniform strain distribution.2) For medical micro-welding,oxygen is found to be a key role for welding strength and *** formation of intermetallics reduces the relative ductility and increases the susceptibility of *** laser processing parameters can significantly influence weld mechanical performance.3) For femtosecond laser nanofabrication,the joining of Au nanoparticles is successfully achieved by controlling laser *** nanostructure of Ag induced by femtosecond laser irradiation can work effective probes for surface enhanced Raman spectroscopy.