J.Engng.Mater.Technol. 116, 268-273, 1994


MICROSCALE ARRANGEMENT EFFECTS
ON THE THERMOMECHANICAL BEHAVIOR
OF ADVANCED TWO-PHASE MATERIALS

H.J. Böhm¹, F.D. Fischer², F.G. Rammerstorfer¹ and T. Siegmund²

Christian Doppler Laboratory for Micromechanics of Materials at the
¹Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
²Institute of Mechanics,
University for Mining and Metallurgy, Leoben, Austria


Abstract - Finite Element based micromechanical methods are used to study the influence of microscale phase arrangements on the overall and microscale thermomechanical properties of two advanced two-phase materials, duplex steels and unidirectional continuously reinforced metal matrix composites (MMCs). Both inclusion--matrix topologies and interwoven microgeometries are investigated for duplex steels, and the predicted macroscopic transverse elastoplastic responses are correlated with quantitative stereological descriptions of the microgeometries. For the MMCs, the emphasis is put on the influence of the fiber arrangement on the microscale residual stress states of the as-produced material and on their effects on damage mechanisms.


(hjb,960626)