STP1270

    Helium Effects on the Reweldability and Low Cycle Fatigue Properties of Welded Joints for Type Cr16Ni11Mo3Ti and 316L(N) Stainless Steels

    Published: Jan 1996


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    Abstract

    The reweldability of austenitic alloys has been studied for flat specimens of Cr16NillMo3Ti (Russian) and 316L(N)-SPH (European Union) which have been implanted with helium using cyclotron facilities. Specimens with typical thicknesses of 1 mm have been implanted up to helium concentrations of 50, 100, 300 and 860 appm on both sides. Electron beam welding of Cr16NillMo3Ti resulted in weld cracking for specimens with the highest helium concentration of 860 appm, unlike the 316L-SPH material in similar conditions. A reduction in fatigue life in low cycle fatigue was found to be more significant for welded joints of Cr16NillMo3Ti material.

    Keywords:

    Austenitic stainless steel, electron beam welding, helium implantation, helium bubble growth, HAZ cracking, weld cracking, low cycle fatigue


    Author Information:

    Fabritsiev, SA
    D.V. Efremov Institute of Electrophysical Apparatus, St. Petersburg,

    van der Laan, JG
    Netherlands Energy Research Foundation, ECN Nuclear Energy, Petten,


    Paper ID: STP16520S

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP16520S


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