J.Physique IV 6 Colloque C6, pp. 395-402, 1996

HIERARCHICAL MODELING OF THE MECHANICAL BEHAVIOR OF HIGH SPEED STEELS AS LAYER-STRUCTURED PARTICULATE MMCs

A.F. Plankensteiner, H.J. Böhm, F.G. Rammerstofer and V.A. Buryachenko

Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria


Abstract - High Speed Steels (HSS) produced by electro-slag remelting can be viewed as particle reinforced Metal Matrix Composites (MMCs) consisting of alternating layers of low and high inclusion volume fraction. These phase arrangements require specific models to be used in analytical and numerical studies of the elastoplastic response.
In the present study, a hierarchical micro-meso-macro approach is discussed, which combines the Multi-Particle Effective Field Method (MEFM) for describing the matrix-inclusion topology at the microscale with an extended lamination theory for handling the layered geometry at the mesoscale. In addition, a Finite Element based two-dimensional method is presented, in which HSS is modeled as a material with a graded microstructure. The obtained results are discussed in terms of overall elastoplastic behavior and of damage relevant microscale fields.


(hjb,970211)