Correlationship between J ICand equivalent fracture strain determined by small-punch test in JN1, JJ1 an JK2 austenitic stainless steels

Maribel L. Saucedo-Muñoz, Toshiyuki Hashida, Victor M. Lopez-Hirata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Small-punch tests and determination of fracture toughness J IC were conducted at 4 and 77 K on new cryogenic JN1, JJ1 and JK2 austenitic stainless steels, after isothermal aging. Equivalent fracture strain ε qf was determined by measuring the reduction of mickness in the small-punch test specimen. A linear dependence of J IC on ε qf was found in these new materials. Regression analysis of experimental data produced the following linear relation J IC = 1304.1 ε qf + 8.09 [kJm -2]. An analysis of present work relation was pursued on the basis of material properties and evaluation method of J IC. Results showed that the slope value has a strong dependence on material yield strength and J IC evaluation method. This linear relation is useful for the evaluation of fracture toughness J IC, measuring the equivalent fracture strain ε qf by means of small-punch test. Thus it can be useful for assessing the degradation of fracture toughness in small areas such as, the heat-affected zone in welded components.

Original languageEnglish
Title of host publicationCharacterization of Minerals, Metals, and Materials - Held During the TMS 2012 Annual Meeting and Exhibition
Pages487-494
Number of pages8
Publication statusPublished - 2012 May 14
EventCharacterization of Minerals, Metals, and Materials - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: 2012 Mar 112012 Mar 15

Publication series

NameTMS Annual Meeting

Other

OtherCharacterization of Minerals, Metals, and Materials - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period12/3/1112/3/15

Keywords

  • Austenitic stainless steels
  • Fracture toughness
  • Small-punch test
  • Thermal aging embrittlement

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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