Residual Stresses of Explosion Cladded Composite Plates of ZERON 100 Superduplex Stainless Steel and ASTM SA516-70 Carbon Steel

Abstract

Abstract. In the present work bimetal composite plates of ZERON 100 superduplex stainless steel and ASME SA516-70 carbon steel were produced by explosion welding and submitted to post weld heat treatment for stress relief. The cross section microstructure of the cladded plates was characterized by optical microscopy and scanning electron microscopy and the hardness profile across the weld interface was determined. Residual stress analysis by X-ray diffraction was performed before and after heat treatment on the stainless steel side of the cladded plates. In the aswelded condition, metallography analysis indicated severe plastic deformation at the welded interface and a wavy morphology characteristic of high adhesive strength. Elevated tensile residual stresses were created as a result of the welding process. The heat treatment process applied (6h at 250°C) did not alter hardness at the welded interface nor the residual stress state in the cladded materials.

Influence of Impact Velocity on the Residual Stress, Tensile Strength, and Structural Properties of an Explosively Welded Composite Plate

“…Due to the wide range of analyzed composite structures and the use of different methods to determine residual stresses, unambiguous conclusions on the state of residual stress in explosively welded multilayer structures cannot be deduced. In most cases, tensile residual stresses were detected in the surface layer of the flyer plate [16,[26][27][28][29][30][31]. Limited cases with compressive residual stresses were found [17,32,33].…”