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Dynamic J-R curves and tension-impact properties of AISI 308 stainless steel weld

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Abstract

In this paper, instrumented tension-impact (dynamic tensile) and instrumented Charpy impact test results for AISI 308 stainless steel welds at room temperature are reported. A few Charpy specimens precracked to a/W (crack length to width ratio) ratios of 0.42 to 0.59 were also tested. Dynamic yield strength obtained from tension-impact test agrees well with that from Charpy V-notch specimens. The strain rates obtained during the tension-impact test are compared with the various estimates of strain rates for V-notch and precracked Charpy specimens. A variation of the compliance changing rate method was necessary for determining the crack initiation point while crack growth was determined by power law key-curve procedure. J-R curves thus obtained from Charpy (precracked and V-notch) specimens are compared with those computed using handbook procedures using dynamic tensile results.

Key words:  Tension-impact testing, 308 stainless steel weld, Charpy V-notch, dynamic fracture toughness, dynamic yield strength, J-R curve, strain rate, key-curve.

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Authors and Affiliations

  1. Materials Development Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

    P.R. Sreenivasan & S.L. Mannan

  2. Tamilnadu, 603 102, India

    P.R. Sreenivasan & S.L. Mannan

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  1. P.R. Sreenivasan
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  2. S.L. Mannan
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Sreenivasan, P., Mannan, S. Dynamic J-R curves and tension-impact properties of AISI 308 stainless steel weld. International Journal of Fracture 101, 229–249 (2000). https://doi.org/10.1023/A:1007621904164

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