Weldability of 9Cr-ODS and JLF-1 Steels for Dissimilar Joining with Hot Isostatic Pressing and Electron Beam Welding*)

Haiying Fu, Takuya Nagasaka, Takeo Muroga, Wenhai Guan, Shuhei Nogami, Akira Hasegawa, Hisashi Serizawa

Research output: Contribution to journalArticlepeer-review

Abstract

Dissimilar joints between 9Cr-ODS and JLF-1 were fabricated by hot isostatic pressing (HIP) and by electron beam welding (EBW), respectively. Compared to the HIP at 1000◦C, HIP at higher temperatures of 1050◦C and 1100◦C is effective to improve the joining strength of the joints. All the as-HIPed joints fractured at the interface during tensile tests. 1050◦C-HIP showed the best joining strength and reduction of area. Post-weld heat treatment (PWHT) with normalization and tempering (N&T) could further improve the joining properties of the HIPed joints. The joints fractured outside the interface at the JLF-1 base metals. EBW showed better weld-ability than HIP, because the joint made by EBW did not fracture at the weld metal during tensile tests, but always fractured at JLF-1 side. However, the properties of the HIPed joints were improved after PWHT with N&T, and were comparable to that made by EBW.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPlasma and Fusion Research
Volume10
DOIs
Publication statusPublished - 2015

Keywords

  • electron beam welding
  • hot isostatic pressing
  • joining strength
  • post-weld heat treatment

ASJC Scopus subject areas

  • Condensed Matter Physics

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