J. Mater. Sci. Technol. ›› 2022, Vol. 106: 173-182.DOI: 10.1016/j.jmst.2021.06.085

• Research Article • Previous Articles     Next Articles

A viable approach to repair neutron shielding B4C/6061 Al composite sheets through cold spray and hot rolling co-treatment

Xiang Qiua,b, Lu Qic, Jun-rong Tangd, Naeem ul Haq Tariqe,*(), Ji-qiang Wangd,*(), Tian-ying Xiongd   

  1. aQingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    bCAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    cScience Center for Material Creation and Energy Conversion, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China
    dInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    eDepartment of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
  • Received:2021-04-26 Revised:2021-06-15 Accepted:2021-06-16 Published:2022-04-20 Online:2021-10-07
  • Contact: Naeem ul Haq Tariq,Ji-qiang Wang
  • About author:jqwang11s@imr.ac.cn (J.-q. Wang).
    *E-mail address: naeem421@hotmail.com (N.u.H. Tariq),

Abstract:

Cold spray (CS) is considered as a new type of repairing technique for restoration or remanufacturing of a wide range of unserviceable engineering components due to its unique ‘cold’ characteristic. In this work, a viable repairing approach i.e. "cold spraying followed by hot rolling post-treatment" was successfully applied to restore defective neutron shielding B4C/6061 Al composite plates. Scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) results revealed that the coating-substrate interface is in a good bonding state without micro-cracks. Hot rolling post-treatment resulted in improved microstructure of the as-sprayed deposit with more uniform distribution of B4C particles in the matrix. Moreover, well bonded splat boundaries and strain free Al grains were evolved in the matrix due to enhanced splat deformation and continuous dynamic recrystallization (CDRX). Three-point bending test results revealed that the strength of the repaired material is at par with the in-service plates. The findings of this work could be considered as a great stride to further extend possible applications of CS for repairing engineering structural components.

Key words: B4C/6061 Al, Cold spray, Repairing, Three-point bending test