Development of Small Punch Tests for Creep Property Measurement of Tungsten-Alloyed 9%Cr Ferritic Steels

Shin Ichi Komazai, Toshiyuki Hashida, Tetsuo Shoji, Koshi Suzuki

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

Abstract

A small punch creep (SP-C) testing technique using miniaturized specimens has been demonstrated for evaluating creep properties and material deterioration due to thermal aging. This technique has been applied to tungsten-alloyed 9%Cr ferritic steels. Experimental results revealed that the overall shapes of the creep curves obtained from the SP-C tests were qualitatively similar to those obtained from conventional uniaxial creep tests and reflected closely the degradation of creep rupture strength of the materials. A correlation with uniaxial creep was also determined in terms of stress (load) exponent and apparent activation energy for creep deformation. The correlation suggests that the SP-C testing technique may provide a useful tool for evaluating degradation of creep properties for structural components in-service.

Original languageEnglish
Pages (from-to)249-256
Number of pages8
JournalJournal of Testing and Evaluation
Volume28
Issue number4
Publication statusPublished - 2000 Jul 1

Keywords

  • Apparent activation energy
  • Creep
  • Material deterioration
  • Small punch creep testing technique
  • Stress (load) exponent
  • Tungsten alloyed 9%Cr ferritic steels
  • Uniaxial creep test

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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