选区激光熔化成形TA1钛合金组织性能研究

通过选区激光熔化(SLM)制备TA1合金,研究了打印态及退火态TA1合金的组织及性能。研究结果表明,SLM制备的TA1合金具有优异的力学性能,其抗拉强度、伸长率及断面收缩率均满足GJB 2744A-2007中锻件的要求,尤其抗拉强度达到600 MPa以上。打印件在不同打印方向上的性能略有差异,Y方向上最优,X方向上次之,Z方向上最弱(580 MPa)。退火处理后的组织更加均匀,抗拉强度、断面收缩率和硬度比打印态略有降低,伸长率略有增大。SLM制备的TA1合金能够在复杂精密件的应用上代替锻件,节省原材料,为3D打印TA1合金的应用提供参考。

Microstructure and Mechanical Properties of TA1 Titanium Alloy Prepared by Selective Laser Melting

The microstructure and properties of TA1 alloy prepared by selective laser melting(SLM) were investigated.The results show that the TA1 alloy prepared by SLM has excellent mechanical properties and its tensile strength,elongation and reduction of aera all meet the requirements of GJB 2744 A-2007.Especially the tensile strength reaches more than 600 MPa.The performance of the 3 D printed parts is slightly different in different printing directions XYZ.The Y direction is the best,the X direction is better,and the Z direction is good(580 MPa).After annealing,the samples have more uniform microstructure,and the tensile strength,shrinkage and hardness of the samples reduced slightly,and the elongation increased slightly.The TA1 alloy prepared by SLM can replace forgings in the application of complex precision parts,and save raw materials,which may be providing reference for the printing application of 3 D printing TA1 alloy.