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
TU Wien, Vienna, Austria
²Böhler Edelstahl GmbH, Kapfenberg, Austria
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.