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研究了以元素粉末为送进原料时,激光立体成形(LSF)Ti-Al-V系合金的力学性能。结合激光立体成形Ti-xAl-yV(x≤10,y≤25)合金的硬度测试分析和人工神经网络模型优化,获得激光立体成形Ti-xAl-yV合金成分-硬度的关系。选择典型成分合金进行室温拉伸性能测试,在此基础上获得激光立体成形钛合金抗拉强度与显微硬度的比例因子K值为2.86～3.00,可实现对激光立体成形Ti-xAl-yV(x≤10,y≤25)合金的抗拉强度预测。另外,室温拉伸性能测试结果表明,激光立体成形Ti-4Al-3V、Ti-5Al-3V、Ti-4Al-4V、Ti-5Al-4V以及Ti-3Al-6V沉积态的综合室温拉伸性能均达到Ti-6Al-4V合金的锻件标准。
The mechanical properties of laser-solid-state (LSF) Ti-Al-V alloys were investigated when elemental powders were fed as raw materials. The relationship between the composition and hardness of Ti-xAl-yV alloy was obtained by the hardness test analysis and artificial neural network optimization of the Ti-xAl-yV (x≤10, y≤25) alloy by laser three-dimensional forming. Select the typical composition of the alloy for tensile testing at room temperature, on this basis to obtain laser stereolithography titanium alloy tensile strength and microhardness ratio factor K value of 2.86 ~ 3.00, can be realized on the laser three-dimensional forming Ti-xAl-yV ( x ≤ 10, y ≤ 25) alloy tensile strength prediction. In addition, the results of tensile tests at room temperature show that the room temperature tensile properties of Ti-4Al-3V, Ti-5Al-3V, Ti-4Al-4V, Ti-5Al-4V and Ti-3Al- All meet the Ti-6Al-4V alloy forgings standard.