CHEN Dongxue, XU Bohan, ZHANG Jianfei, et al.Effect of Hot Isostatic Pressing on Properties of TC4 Ttitanium Alloy Parts Prepared by Selective Electron Beam Melting[J].Electric Welding Machine, 2023, 53(6): 36-41.
CHEN Dongxue, XU Bohan, ZHANG Jianfei, et al.Effect of Hot Isostatic Pressing on Properties of TC4 Ttitanium Alloy Parts Prepared by Selective Electron Beam Melting[J].Electric Welding Machine, 2023, 53(6): 36-41. DOI： 10.7512/j.issn.1001-2303.2023.06.06.
Effect of Hot Isostatic Pressing on Properties of TC4 Ttitanium Alloy Parts Prepared by Selective Electron Beam Melting
Hot Isostatic Pressing (HIP) is one of the effective methods to eliminate the internal clearance of the molded parts. In this paper, TC4 titanium alloy specimens prepared by Selective Electron Beam Melting(SEBM) are taken as the research object. Hot isostatic pressing experiments are carried out in the furnace to study and analyze the microstructure and mechanical properties of the alloy after hot isostatic pressing treatment. The experimental results show that the density of TC4 titanium alloy specimen after hot isostatic pressing reaches more than 99% by drainage method, and it is almost completely dense. The tensile test was carried out on the tensile specimen at room temperature. After hot isostatic pressing treatment, the tensile strength of the specimen decreased and the plasticity increased. The tensile strength was 640.49 MPa, which was lower than 760 MPa of SEBM formed parts, and the elongation at break reached 19.95%. The fracture surface of the specimen shows elongated cup and cone shape and a few large and deep dimples, which indicates that the plasticity of the specimen is improved and the strength is reduced. After hot isostatic pressing, the specimen presents a basket structure, which is uniform and fine as a whole, and consists of coarsened strips α Phase and larger equiaxed α Grain composition with a small amount β Grain size.
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