Hot-pressing sintering diffusion bonding of a high-toughness titanium alloy and an ultra-high-strength steel with Ta/Ni dual-interlayer

Chengwei Li; Qunbo Fan; Lin Yang; Luyue Qiu; Shun Xu; Ni Xiong; Haichao Gong; Junjie Zhang

Journal of Materials Research and Technology (Mar 2024)

Hot-pressing sintering diffusion bonding of a high-toughness titanium alloy and an ultra-high-strength steel with Ta/Ni dual-interlayer

Chengwei Li,
Qunbo Fan,
Lin Yang,
Luyue Qiu,
Shun Xu,
Ni Xiong,
Haichao Gong,
Junjie Zhang

Affiliations

Chengwei Li: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China
Qunbo Fan: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China; Beijing Institute of Technology Chongqing Innovation Center, Chongqing, 401135, China; Corresponding author. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Lin Yang: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China; Corresponding author. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Luyue Qiu: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China
Shun Xu: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China
Ni Xiong: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China
Haichao Gong: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China
Junjie Zhang: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China; National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing, 100081, China

Journal volume & issue: Vol. 29
pp. 3543 – 3553

Abstract

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The powder metallurgy forming of ultra-high-strength steel (UHSS) G33 and its combination with high toughness titanium alloy Ti–7Al–1Mo-0.5V-0.1C were achieved through the application of Ta/Ni dual-interlayer in a hot-press sintering diffusion bonding (HPSDB) process, conducted at 970 °C, 50 MPa, and a duration of 3 h. The resulting bonding strength proved excellent, with a high shear strength of 485.5 MPa. The interface structure, precipitated phases, and element diffusion behavior were investigated through scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). Notably, no intermetallic compounds (IMCs) precipitated in the Ti–Ta diffusion zone or the Ni-G33 diffusion zone, underscoring the effectiveness of the metallurgical bond. Selected area electron diffraction (SAED) and phase diagram calculation were employed to elucidate the mechanisms contributing to the robust bonding strength of the joint with Ta/Ni dual-interlayer. The results revealed that the diffusion zone primarily comprised NiTa2, Ni2Ta, and Ni3Ta with high shear modulus and excellent ductility. Near the bonding interface, Ni3Ta grains exhibited approximate low-angle torsional grain boundaries, effectively impeding dislocation movement. Moreover, the bonding strength was further enhanced by the precipitation of nanoscale tetragonal-Ta dispersed within the Ni2Ta matrix.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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