Research of Laser Rapid Forming Ti40 Burn Resistant Titanium Alloy
Laser rapid forming(LRF) ,a deposition forming process which can be utilized to produce threedimensional engineering structures line by line and layer by layer,is a promising technology for the rapid prototyping and manufacturing of complicated metal components. In the present paper, the LRF process for both thin-walled and block components of a Ti40 burn-resistant titanium alloy(Ti-25V-15Cr0.2Si) were investigated. The microstructures of the deposited Ti40 alloy were studied by Optical Microscopy(OM), Scanning Electronic Microscopy(SEM) observation and X-Ray Diffraction(XRD) analysis. The mechanical properties were evaluated by tensile test. The results show that defect-free and homogeneous deposited layers can be formed under optimum processing condition. Both the thin-walled and the block as-LRFed samples present the β phase microstructure, with equiaxed grains in the former but columnar ones in the latter case, respectively. The maximum roomtemperature tensile strength of as-LRFed samples achieves 997MPa, while the tensile elongation is as high as 20％. The fractograph of tensile sample show mixed characteristics, which consists of intracrystalline dimple fracture and transgranular cleavage fracture.
Ti40 titanium alloy laser rapid forming microstructure mechanical property
Huang Chunping Lin Xin Yang Haiou Liu Fengcheng Ge Peng Zhao Yongqing Huang Weidong
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072 State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072 North-west Institute for Non ferrous Metal Research,Xian 710016,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
202-205
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）