中文摘要：

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。

英文摘要：

The mechanical properties of laser solid forming（LSF） of Ti-Al-V ternary system titanium alloys from blended elemental powders are investigated.The relationship between the composition and the hardness of LSF Ti-xAl-yV（x≤10,y≤25） is obtained based on the hardness test and the neural network model optimization.The room temperature tensile properties of some typical LSF Ti-xAl-yV alloys are obtained,and the scale factor K of the tensile strength to the microhardness is obtained between 2.86 to 3.00,and thus the tensile strength prediction for LSF Ti-xAl-yV can be realized.The test results show that the room temperature tensile properties of laser deposited Ti-4Al-3V、Ti-5Al-3V、Ti-4Al-4V、Ti-5Al-4V and Ti-3Al-6V have reached the wrought standard of Ti-6Al-4V.