Evaluation of thermal aging embrittlement of austenitic stainless steels JN1, JJ1 and JK2 steels by cryogenic small-punch testing

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

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

Abstract

Small-punch tests were conducted at 4, 77 and 293 K on three types of austenitic stainless steels JN1, JJ1 and JK2, which were solution treated, water-quenched and then aged at 923, 973, 1023 and 1073 K for 5 h. Small-punch test energy was employed for the evaluation of the aging- induced embrittlement behavior in these materials. Fracture surface of small punch test specimen for the solution treated steels exhibited a ductile fracture, showing the highest SP test energy values. The presence of intergranular brittle fracture was observed in aged specimens. Small-punch test energy decreased significantly as the aging process progressed. The highest and lowest decrease in small-punch test energy with aging temperature occurred in JN1 and JK2 steels, respectively. The decrease in small-punch test energy showed to examine appropriately the aging-induced embrittlement in these materials. The difference in aging-induced embrittlement behavior for these steels was explained based on the volume fraction of intergranular precipitates in aged samples.

Original languageEnglish
Title of host publicationEPD Congress 2011 - Held During TMS 2011 Annual Meeting and Exhibition
Pages127-134
Number of pages8
Publication statusPublished - 2011 Dec 1
EventEPD Congress 2011 - TMS 2011 Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 2011 Feb 272011 Mar 3

Publication series

NameTMS Annual Meeting
Volume1

Other

OtherEPD Congress 2011 - TMS 2011 Annual Meeting and Exhibition
CountryUnited States
CitySan Diego, CA
Period11/2/2711/3/3

Keywords

  • Austenitic stainless steels
  • Small-punch test
  • Thermal aging embritflement

ASJC Scopus subject areas

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

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