Elastic property of aged duplex stainless steel

Masakazu Tane, Tetsu Ichitsubo, Hirotsugu Ogi, Masahiko Hirao

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We have measured the elastic constants of duplex stainless steel, JIS-SCS14A (CF8M), aged isothermally at 400 °C up to 10,000 h, using resonant ultrasound spectroscopy method. The elastic constant c11 (=λ+2μ) increases monotonically with the aging time, but c44 (=μ) remains virtually unchanged. Using a micromechanics model, we have deduced the elastic constants of α-phase on the assumption that those of γ-phase are unchanged with the aging. The increase of the α-phase elastic constants reflects the spinodal decomposition of α-phase.

Original languageEnglish
Pages (from-to)229-234
Number of pages6
JournalScripta Materialia
Issue number3
Publication statusPublished - 2003 Feb


  • Acoustic methods
  • Aging
  • Dual phases
  • Elastic behaviour
  • Micromechanical modeling


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