Strengthening the diffusion bonding of Zr-4 alloys through regulating surface roughness and Ti interlayer thickness

IF 6.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-09-20 DOI:10.1016/j.jmrt.2025.09.181

Yujie Bai , Zeming Wang , Hui Chen , Yuanxing Li

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引用次数: 0

Abstract

The welding of Zr alloys has garnered significant attention within the nuclear industry. In this study, diffusion bonding of Zr-4 alloys was performed at 700 °C/60 min/15 MPa, and effects of substrate surface roughness and Ti interlayer thickness on microstructure and mechanical properties of joints were investigated. Joints without or with Ti interlayers indicated an increase in bonding ratio (or diffusion layer thickness) and shear strength as the surface roughness decreased. Introducing Ti interlayers reduced the dependence on surface roughness and enhanced the joint performance. Moreover, the thickness and uniformity of diffusion layers and shear strength increased as the Ti interlayer thickness decreased. The maximum shear strength of 231 MPa was obtained for the Zr-4/Ti₁₀/Zr-4 joint, 320 % higher than that of the direct joint under the same welding parameters. The fracture surfaces displayed features characteristic of shear bands and dimples, with nearly complete elimination of unbonded regions after decreasing substrate surface roughness or Ti interlayer thickness.

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通过调节表面粗糙度和Ti层间厚度来强化Zr-4合金的扩散结合

锆合金的焊接在核工业中引起了极大的关注。在700℃/60 min/15 MPa条件下，对Zr-4合金进行扩散连接，研究基体表面粗糙度和Ti层间厚度对接头组织和力学性能的影响。随着表面粗糙度的减小，无Ti中间层或有Ti中间层的接头的结合率（或扩散层厚度）和抗剪强度均有所增加。引入Ti中间层降低了对表面粗糙度的依赖，提高了接头的性能。随着Ti层间厚度的减小，扩散层厚度、均匀性和抗剪强度均增大。在相同焊接参数下，Zr-4/Ti10/Zr-4接头的最大抗剪强度为231 MPa，比直接接头的抗剪强度提高320%。断口表面呈现剪切带和韧窝的特征，降低基体表面粗糙度或Ti层间厚度后，几乎完全消除了非键合区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.