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    Dissimilar joining of molybdenum to tungsten and graphite using Cu78Ti22 filler

    Huang, L, Miao, S, Zeng, Y, Cai, Y, Haider, J ORCID logoORCID: https://orcid.org/0000-0001-7010-8285 and Mao, Y (2025) Dissimilar joining of molybdenum to tungsten and graphite using Cu78Ti22 filler. Welding in the World. ISSN 0043-2288

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    Abstract

    Brazing of molybdenum to tungsten and to graphite has been achieved using Cu78Ti22 filler at 930 ℃. The brazing regions of both joints are mainly composed of Cu(ss) (solid solution), Ti-Cu intermetallics, Ti(ss), and Mo. The diffusion and dissolution of Mo element from the molybdenum substrate to the brazing region occur during the joining process for both joints. For the molybdenum/tungsten joint, the absorption of Ti on the tungsten side may promote interfacial bonding between the brazing region and the tungsten substrate. For the molybdenum/graphite joint, the active Ti in the filler can react with the graphite to develop a reaction layer of TiC at the brazing region/graphite interface, contributing to the interfacial bonding between the brazing region and the graphite. The fracture of the molybdenum/tungsten joint after the shear test occurs at the brazing region/tungsten interface, which is attributed to its relatively weak interfacial bonding. The molybdenum/graphite joint breaks on the graphite side, mainly caused by the large residual stress in the joint.

    Item Type: Article (Article)
    Peer-reviewed: Yes
    Date Deposited: 22 Jul 2025 09:19
    Publisher: Springer
    Additional Information: This is an author accepted manuscript of an article published in Welding in the World, by Springer. This version is deposited with a Creative Commons Attribution 4.0 licence [https://creativecommons.org/licenses/by/4.0/], in accordance with Man Met's Research Publications Policy. The version of record can be found on the publisher's website.
    Divisions: Faculties > Science and Engineering
    Faculties > Science and Engineering > Department of Engineering
    Subject terms: 09 Engineering, Mining & Metallurgy, 40 Engineering
    Data Access Statement: All data during the study are available from the corresponding author by request.
    URI: https://e-space.mmu.ac.uk/id/eprint/640424
    DOI: https://doi.org/10.1007/s40194-025-02096-1
    ISSN 0043-2288
    e-ISSN 1878-6669

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