(楚雄师范学院 材料制备及力学行为研究所，楚雄 675000)
摘 要: 采用万能材料试验机系统，对激光快速成形TC4钛合金不同取向圆柱形试样进行准静态压缩试验，使用光学显微镜、扫描电镜、XRD等分析手段，研究不同取向对其力学性能的影响。结果表明：不同取向激光快速成形TC4钛合金由于微观结构的差异，其准静态压缩力学性能也不同，其中，与激光扫描方向成45°角试样显示最高的强度，但塑性最差；而沿沉积方向试样则显示最好的塑性性能，其强度与沿激光扫描方向试样的强度相当。
关键字: 激光快速成形Ti-6Al-4V；钛合金；准静态压缩；力学性能
（Research Institute on Preparation and Mechanical Behavior of Materials, Chuxiong Normal University, Chuxiong 675000, China）
Abstract:Using the electronic universal test machine, the quasi-static compression experiment on three different orietations cylindrical sample of laser rapid forming Ti-6Al-4V(LRF TC4) titanium alloy were conducted, and effect of the different orietations on mechanical proprieties of LRF TC4 alloy was investigated by methods of optical microscope (OM), scanning electronic microscope (SEM) and X-ray diffractometer (XRD). The results show that the different orietations sample of LRF TC4 has different quasi-static compression mechanical proprieties owing to the different of microstructure. The sample at an angle of 45° to the scanning direction of Laser has the maximal strength, but the minimal plasticity. The sample cut along depositing direction takes on the best plasticity and its strength is equivalent to the sample cut along the scanning direction of laser.
Key words: laser rapid forming Ti-6Al-4V; titanium alloy; quasi-static compression; mechanical proprieties
