Acta mater. 45, 1875-1887, 1997


A.F. Plankensteiner¹, H.J. Böhm¹, F.G. Rammerstorfer¹, V.A. Buryachenko¹ and G. Hackl²

¹Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
²Böhler Edelstahl GmbH, Kapfenberg, Austria

Abstract - High Speed Steels (HSSs) produced by electro slag remelting can be viewed as metal matrix composites containing alternating layers of high and low inclusion volume fraction. To account for such specific phase arrangements a hierarchical micro-meso-macro approach for elastoplastic analyses of HSSs is presented. It combines an extended lamination theory for modeling the layered structure at the mesoscale with the Multi-Particle Effective Field Method for describing the matrix-inclusion topology at the microscale. The overall elastoplastic behavior and the microfields relevant for microscale damage initiation are studied with respect to their dependence on meso- and microtopology parameters. The results are compared with predictions from a two-dimensional finite element micromechanics model, which treats the HSS as a matrix-inclusion composite with a graded microstructure.