Influence of forging deformation on diffusion bonded TC4 titanium alloy

YANG Xingyuan; CAI Yusheng; JIANG Muchi; REN Dechun; JI Haibin; LEI Jiafeng; XIAO Xuan

doi:10.13264/j.cnki.ysjskx.2023.04.011

Volume 14 Issue 4

Aug. 2023

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Nonferrous Metals Science and Engineering > 2023 > 14(4): 527-535. > DOI: 10.13264/j.cnki.ysjskx.2023.04.011

YANG Xingyuan, CAI Yusheng, JIANG Muchi, REN Dechun, JI Haibin, LEI Jiafeng, XIAO Xuan. Influence of forging deformation on diffusion bonded TC4 titanium alloy[J]. Nonferrous Metals Science and Engineering, 2023, 14(4): 527-535. DOI: 10.13264/j.cnki.ysjskx.2023.04.011

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Influence of forging deformation on diffusion bonded TC4 titanium alloy

1.
School of Material Science and Engineering, Shenyang Ligong University, Shenyang 110159, China
2.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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Received Date: June 22, 2022
Revised Date: August 03, 2022
Available Online: August 23, 2023

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Abstract

Abstract

In this paper, TC4 titanium alloy bars were employed to study the effect of forging deformation on the microstructure and mechanical properties of the diffusion bonding interface. The results showed that the TC4 titanium alloy interface was metallurgically bonded by diffusion bonding process at 950 ℃ and 140 MPa for 4 h. The strength of the diffusion bonded sample was 95% higher than that of the base metal, and the elongation was 7%. The brittle fracture occurred in the diffusion zone. After high-temperature forging, the diffusion bonding interface of the TC4 titanium alloy completely disappeared. The microstructure consisted of an equiaxed α phase, a secondary α phase, and a small amount of β phase. With increasing forging deformation, the size of the equiaxed α phase decreased, the volume fraction of the secondary α phase and the alloy strength increased. When the deformation was 40%, the content of the equiaxed α phase and secondary α phase reached the best matching degree. The tensile strength reached 950 MPa, the elongation reached 17.5%, and the fracture mode of the alloy transformed into ductile fracture.
- TC4 titanium alloy,
- diffusion connection,
- forging deformation,
- interface structure,
- mechanical property

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