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Influence of prestrain history on fracture toughness properties of steels

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Abstract

The effects of prestrain history on fracture toughness properties (J Ic values andJ R curves) of 4340 steel and 316 stainless steel were investigated. It was observed that monotonic prestrain decreased fracture toughness of both steels regardless of prestrain level. Although cyclic prestrain elevated fracture toughness of 4340 steel, it degraded that of 316 stainless steel. The effects of cyclic prestrain on fracture behavior of 4340 steel and 316 stainless steel were found to be related to cyclic softening and cyclic hardening characteristics, respectively. Moreover, material strengths rationalized the influence of prestrain history on fracture toughness properties of these two steels.

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Authors and Affiliations

  1. Metallurgy Department, Westinghouse R and D Center, 15235, Pittsburgh, PA

    P. K. Liaw (Senior Engineer)

  2. Structure Integrity, American Welding Institute, New Topside Road, Route 4, Box 90, 37777, Louisville, TN

    J. D. Landes (Manager)

Authors
  1. P. K. Liaw
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  2. J. D. Landes
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Formerly with the Westinghouse Electric Corporation

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Liaw, P.K., Landes, J.D. Influence of prestrain history on fracture toughness properties of steels. Metall Trans A 17, 473–489 (1986). https://doi.org/10.1007/BF02643954

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  • DOI: https://doi.org/10.1007/BF02643954

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