激光冲击强化优化TA15电子束焊接接头的组织性能(英文)

Microstructure and Properties of TA15 EBW Joints Optimized by Laser Shock Processing

采用激光冲击强化技术(LSP)对TA15钛合金电子束焊接(EBW)接头进行处理。对经过LSP处理的TA15钛合金接头,分别检测了接头的表面硬度、耐腐蚀性能、25℃室温与300℃拉伸力学性能及断口形貌。与未经LSP处理的EBW接头相比,经过LSP处理后的TA15 EBW接头表面的HV硬度得到了提高,耐腐蚀性能并没有明显降低,在25℃室温和高温300℃拉伸时,接头的拉伸性能均得到了显著提高。研究结果表明:LSP技术能够有效改善TA15钛合金EBW接头的组织性能。

Laser shock processing(LSP) was introduced to treat electron beam welding(EBW) joints of TA15 titanium alloy.After LSP treatment,surface hardness,corrosion resistance,tensile mechanical properties at 300 oC,and the fractures of joints were detected.The results show the properties of TA15 titanium alloy EBW joints treated by LSP have been improved.After LSP treatment,the bead surface HV hardness is increased.Compared with original weld beads,the corrosion resistance of these joints treated by LSP is not reduced.After LSP treatment,tensile properties of TA15 titanium alloy joints at 25 and 300 oC are improved observably.