Effects of Chemical Composition on the Impact Properties of A533B Steels

Byung Jun Kim; Ryuta Kasada; Akihiko Kimura

doi:10.4028/www.scientific.net/MSF.654-656.2895

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Effects of Chemical Composition on the Impact...

Effects of Chemical Composition on the Impact Properties of A533B Steels

Abstract:

In order to estimate the long life integrity of vessel steels with considering various material compositions and irradiation conditions, it is necessary to understand physical mechanisms of the degradation of mechanical properties. In this research, chemical composition effects were investigated for Reactor Pressure Vessel Steels (RPVS) to apply small specimen test technique to surveillance test method. All specimens used in this study were machined from the A533B plate material, which are standard, low Mn, high Cu, high P, and high Cu and high P steels. Tensile strength is increased by phosphorous and copper additions. Charpy tests were carried out at temperature from 73 K to 473 K. The ductile to brittle transition temperature (DBTT) is shifted to higher temperatures with phosphorus additions accompanied by the reduction of the upper shelf energy (USE). The fracture mode of P-added A533B steels at temperatures in the lower shelf energy (LSE) region is intergranular cracking. Test results were discussed in view of the differences on elements of Cu, Mn and P.

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Periodical:

Materials Science Forum (Volumes 654-656)

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2895-2898

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.2895

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Online since:

June 2010

Authors:

Byung Jun Kim, Ryuta Kasada, Akihiko Kimura

Keywords:

Chemical Composition Effect, Impact Property, Intergranular Cracking, RPVS

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