Small Punch Testing for Determining the Cryogenic Fracture Properties of 304 and 316 Austenitic Stainless Steels in a High Magnetic Field

Abstract

This paper examines the effect of magnetic field on the fracture properties of austenitic stainless steels at liquid helium temperature (4 K). Small punch tests were performed on cold-rolled 304 and 316 austenitic stainless steels. Previously proposed correlation for small punch and elastic-plastic fracture toughness test methods was applied to predict a small punch test-based fracture toughness from equivalent fracture strain.