Measurement of Residual Stress in Explosively Austenitic Stainless Clad Steel by Heat Treatment

Abstract

An effect of heat treatment on the amount of the residual stress and its distribution in the explosively austenitic stainless clad steel was investigated. The stress was measured by X-ray method at both surfaces of clad and then at the interior of the cladding metal.
Consequently, it was recognized that the stress considerably increased with the heating temperature at the surface and the interior of the cladding metal, and an existence of discontinuity in stress, that is, an abrupt change from a large tensile stress (in cladding metal) into a compressive stress (in base metal) was confirmed.
As a result of theoretical calculation, it was concluded that such increase in stress due to the heat treatment depended on the difference of the expansion coefficients between the cladding metal and the base metal, and also the calculation values agreed with the measured values quantitatively.