Correlationship between JIC and equivalent fracture strain determined by small-punch tests in JN1, JJ1 and JK2 austenitic stainless steels

Maribel L. Saucedo-Muoz, Shi Cheng Liu, Toshiyuki Hashida, Hideaki Takahashi, Hideo Nakajima

研究成果: Article

25 引用 (Scopus)

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Small-punch (SP) and fracture toughness tests were conducted at 4 and 77 K on newly developed cryogenic austenitic stainless steels after isothermal aging. Equivalent fracture strain εqf was determined by measuring the reduction in thickness of SP specimens. A linear dependence of JIC on εqf was found for these new materials. Regression analysis of experimental data produced the linear relation: JIC = 1304.1εqf+8.09(kJ m-2). An analysis of the correlation was pursued on the basis of material properties and evaluation method of JIC. The results showed that the slope value was influenced by the JIC evaluation method. This linear relation enables the prediction of JIC to be made from the equivalent fracture strain εqf by conducting small punch tests. Thus, it is expected that the SP testing method provides a useful basis for assessing the degradation of fracture toughness in small areas, such as heat-affected zones in welded components.

元の言語English
ページ(範囲)713-719
ページ数7
ジャーナルCryogenics
41
発行部数10
DOI
出版物ステータスPublished - 2001 10 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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