Effect of pressure application by HIP on microstructure evolution during diffusion bonding

Naoya Masahashi, Shuji Hanada

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The effect of pressure application by hot isostatic press (HIP) during diffusion bonding on microstructure evolution and bonding strength was studied using a couple of an Fe-Al alloy (Fe-Al) and CrMo steel (CrMo). Columnar microstructure evolution from the joint interface to the CrMo side is suppressed and aluminum diffusion from Fe-Al to CrMo is retarded with pressure application. Refined microstructure with fine precipitates is observed in the CrMo side beyond the columnar grains of the couple bonded with pressure. The application of pressure decreases the bonding strength and the strain to failure. It is concluded that the application of pressure provides microstructure refinement and strong hardening in the CrMo side of the couple, although it is not beneficial for bonding strength.

Original languageEnglish
Pages (from-to)1651-1655
Number of pages5
JournalMaterials Transactions
Issue number7
Publication statusPublished - 2005 Jul


  • Diffusion bonding
  • Hardness
  • Hot isostatic pressing (HIP)
  • Iron aluminum alloys
  • Orientation imaging microscopy (OIM)

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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