Mechanical properties of laser weldment of V-4CR-4Ti alloy

Nam Jin Heo, Takuya Nagasaka, Takeo Muroga, Arata Nishimura, Kenji Shinozaki, Hideo Watanabe

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The effect of the laser welding condition on properties of the weldment, such as bending, tensile and charpy impact properties were investigated in a V-4Cr-4Ti alloy (NIFS-HEAT-2). The microstructural and microchemical development in the weldment was also investigated for mechanistic study of the impurity behavior during the welding. Increase in hardness occurred in the weld zone. The hardening was due to the dissolution of the large and small precipitates existed in the base metal before welding. The degree of hardening varied with a distance from the bead center. The absorption energy by the impact test increased with the decrease in the input power density during the laser welding. The impact absorption energy of the weld, which is similar to that of the base metal, was obtained by optimizing the welding condition.

Original languageEnglish
Pages (from-to)470-474
Number of pages5
JournalFusion Science and Technology
Issue number2
Publication statusPublished - Jan 1 2003

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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