Residual Stresses in Ultrafine‐Grained Laminated Metal Composites Analyzed by X‐ray Diffraction and the Hole‐Drilling Method

Accumulative roll bonding is an advanced manufacturing process, which capable of simultaneously refining the grain size into nanometer regime and different metallic sheet materials. Herein, homogenous aluminum/aluminum as well heterogeneous aluminum/steel laminated metal composite (LMCs) are fabricated. The residual stresses experimentally determined by X-ray diffraction hole-drilling method. Generally, a complex stress profile found in all LMCs. level strongly depends on bonded Compressive induced sheets near surface area. These range from −5 MPa aluminum to −240 steel. In LMCs, compressive up −26 softer layers tensile 30 stronger built up. This where 40 −72 inner harder steel present. Based results obtained it possible directly design material combination or stacking architecture ultrafine-grained LMCs tailor profile.