WANG Anpu, ZHANG Feng, SUN Bingbing, et al.Study on the Mechanisms of Mechanical Property Anisotropy of TC4Titanium Alloy by Laser Metal Deposition[J].Electric Welding Machine, 2022, 52(4): 14-20.
WANG Anpu, ZHANG Feng, SUN Bingbing, et al.Study on the Mechanisms of Mechanical Property Anisotropy of TC4Titanium Alloy by Laser Metal Deposition[J].Electric Welding Machine, 2022, 52(4): 14-20. DOI: 10.7512/j.issn.1001-2303.2022.04.03.
Study on the Mechanisms of Mechanical Property Anisotropy of TC4 Titanium Alloy by Laser Metal Deposition
Transverse and longitudinal TC4 titanium alloy samples were prepared by laser metal deposition, including room temperature tensile samples, room temperature impact samples, metallographic samples. The relationship between microstructure and anisotropy of mechanical properties was studied. The results show that the different plane structures are composed of typical net basket structure α+β for annealed laser metal deposition of TC4 titanium alloy, but compared with ,XOZ, plane and ,YOZ, plane, the ,XOY, plane has the finer microstructure, the α phase is interlaced with a woven network, the overall size is 2~3 times smaller, there are more α grain boundaries (α,GB,) in coarse columnar β; the transverse specimen has high strength and low plasticity, and the longitudinal specimen has low strength and high plasticity; the reasons for the anisotropy of mechanical properties in transverse (,Y, direction) and longitudinal (,Z, direction) directions are as follows: grain boundary strengthening plays a crucial role, the more grain boundaries, the higher strength and the lower plasticity.
关键词
激光金属沉积TC4钛合金力学性能各向异性晶界强化
Keywords
laser metal depositionTC4 titanium alloymechanical propertiesanisotropygrain boundary
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