Correlation Between a Charpy V-notch Impact Test and a Small Punch Test in Ductile-Brittle Fracture Mode Transition Behavior

Takashi Matsushita, Maribel L. Saucedo, Mitoshi Yotsutsuji, Tetsuo Shoji, Hideaki Takahashi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

It is well known that coarsening of carbides, intergranular impurity segregation and other microstructural change degrade the fracture toughness of ferritic low alloy steels after long service operation. The ductile-brittle transition temperature (DBTT) odtained by Charpy V-notch impact test and its shift after service operation is one of the most useful measures of the fracture characteristics of these materials. However, it is difficult to extract multiple specimens for CVN tests without damaging the components. In this study, the ductile-brittle fracture mode transition behavior of ferritic low alloy steels was investigated by means of a small punch test technique in relation to CVN DBTT behavior. The experimental results revealed a single linear correlation between the DBTT obtained from small punch test and that obtained from a Charpy V-notched impact test for various kinds of ferritic low alloy steels.

Original languageEnglish
Pages (from-to)1619-1622
Number of pages4
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume55
Issue number515
DOIs
Publication statusPublished - 1989

Keywords

  • Charpy Impact Test
  • Ductile-Brittle Transition Temperature
  • Fracture
  • Low Alloy Steel
  • Small Punch Test

ASJC Scopus subject areas

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

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