Correlationship Between Jic And Equivalent Fracture Strain Determined By Small-Punch Test In JN1, JJ1 And JK2 Austenitic Stainless Steels

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

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Small-punch tests and determination of fracture toughness JIC were conducted at 4 and 77 K on new cryogenic JN1, JJ1 and JK2 austenitic stainless steels, after isothermal aging. Equivalent fracture strain eqf was determined by measuring the reduction of thickness in the small-punch test specimen. A linear dependence of Jic on eqf was found in these new materials. Regression analysis of experimental data produced the following linear relation JIC = 1304.1 εqf + 8.09 [kJm-2]. An analysis of present work relation was pursued on the basis of material properties and evaluation method of JIC. Results showed that the slope value has a strong dependence on material yield strength and Jic evaluation method. This linear relation is useful for the evaluation of fracture toughness JIC, measuring the equivalent fracture strain εqf 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
PublisherJohn Wiley and Sons
Pages487-494
Number of pages8
ISBN (Print)9781118291221
DOIs
Publication statusPublished - 2012 May 15

Keywords

  • Austenitic stainless steels
  • Fracture toughness
  • Thermal aging embrittlement

ASJC Scopus subject areas

  • Materials Science(all)

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