(楚雄師范學(xué)院 材料制備及力學(xué)行為研究所，楚雄 675000)
摘 要: 采用萬(wàn)能材料試驗(yàn)機(jī)系統(tǒng)，對(duì)激光快速成形TC4鈦合金不同取向圓柱形試樣進(jìn)行準(zhǔn)靜態(tài)壓縮試驗(yàn)，使用光學(xué)顯微鏡、掃描電鏡、XRD等分析手段，研究不同取向?qū)ζ淞W(xué)性能的影響。結(jié)果表明：不同取向激光快速成形TC4鈦合金由于微觀結(jié)構(gòu)的差異，其準(zhǔn)靜態(tài)壓縮力學(xué)性能也不同，其中，與激光掃描方向成45°角試樣顯示最高的強(qiáng)度，但塑性最差；而沿沉積方向試樣則顯示最好的塑性性能，其強(qiáng)度與沿激光掃描方向試樣的強(qiáng)度相當(dāng)。
關(guān)鍵字: 激光快速成形Ti-6Al-4V；鈦合金；準(zhǔn)靜態(tài)壓縮；力學(xué)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
