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CHEN Shuai, WANG Yue, YANG Jian, HUANG jihua, CHEN Shuhai. Microstructure and properties of hot isostatic pressing diffusion bonding steel/tungsten joint with V/Nb composite interlayer[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(11): 47-53. DOI: 10.12073/j.hjxb.20200118001
Citation: CHEN Shuai, WANG Yue, YANG Jian, HUANG jihua, CHEN Shuhai. Microstructure and properties of hot isostatic pressing diffusion bonding steel/tungsten joint with V/Nb composite interlayer[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(11): 47-53. DOI: 10.12073/j.hjxb.20200118001

Microstructure and properties of hot isostatic pressing diffusion bonding steel/tungsten joint with V/Nb composite interlayer

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  • Received Date: January 17, 2020
  • Available Online: February 01, 2021
  • In this paper, steel and tungsten were successfully bonded using hot isostatic pressing diffusion bonding with V/Nb composite interlayer. The interface structure and shear strength of the joints under high temperature-low pressure process (1 050 ℃, 20 MPa) and low temperature-high pressure process (950 ℃, 100 MPa) were investigated separately. The results show that the joints under high temperature-low pressure process and low temperature-high pressure process both have a W/Nb/V/steel four-layer structure and the shear strengths of the joints are 96.9 MPa and 104.2 MPa respectively. The fracture of the joints all appears at the Nb/V interfaces with no obvious chemical reaction. Compared with the joint under high temperature-low pressure process, reducing the bonding temperature and increasing the bonding pressure will benefit to form a dense joint, but will not promote the diffusion of elements at the weak interface (Nb/V) and significantly increase the shear strength of the joint.
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