选区激光增材制造钛合金构件微结构设计及力学性能

doi:10.7527/S1000-6893.2025.31777

Abstract

Abstract:

Titanium alloy， has the characteristics of high strength， high temperature resistance and has a wide range of application prospects in aerospace and other fields， and the lightweight of titanium alloy structural parts is the future development trend. Titanium alloy blocks with different arc arch structures were designed and fabricated based on the structural advantages of high arch pressure of arch Bridges combined with the technological characteristics of selected laser additive manufacturing. The mechanical properties and fracture failure mechanism of the fabricated blocks were investigated through bending， stretching and compression tests at room temperature. The results show that the arc arch structure can reduce the weight of the component by 16% to 40%. The specimen with arc arch radius of 1 mm and arch height of 0.66 mm showed excellent mechanical properties， and the tensile strength reached 1 558.0 MPa. The bending strength can reach 1 506.7 MPa； The compressive strength can reach 2 040.9 MPa. The tensile fracture presents a large number of dimples， which is characterized by ductile brittle fracture. The compression fracture shows grayish white bands， which are brittle inclined shear fracture. The circular arch structure can effectively reduce the weight of the component and guarantee the mechanical properties at the same time， which provides a new strategy for lightweight structure design.

Key words: lightweight structure design, arc arch structure, Ti6Al4V, selective laser melting, fracture mechanism

CLC Number:

V214.6

Xinlei ZHANG, Ye YUAN, Hongsheng CHEN, Liuwei ZHENG, Wenxian WANG, Jing WANG. Microstructure design and mechanical properties of titanium alloy components for laser selective additive manufacturing[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(24): 431777.

Figures/Tables 20

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Microstructure design and mechanical properties of titanium alloy components for laser selective additive manufacturing

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