Influence of thermally induced plasticity on the Bauschinger effect of SiC/Al composites

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02657864· OSTI ID:5723490

Shi, N ^[1]; Arsenault, R J ^[2]

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1. Los Alamos National Lab., Los Alamos, NM (United States)
2. Univ. of Maryland, College Park, MD (United States)

For any ductile solids, if they are initially deformed plastically in tension and then in compression, i.e., on the reverse direction, the magnitude of the yield stress in the reverse cycle is less than the flow stress in the forward cycle. This reduction in stress is defined as the Baushinger stress factor (BSF) or the Baushinger Effect (BE) in general. In the case of monolithic Al, the direction of initial loading, i.e., tensile or compressive, does not normally have any influence on the BE. The SiC/Al composites, however, exhibit a remarkable characteristic, the flow stress drop during reverse cycle is larger when the composite is deformed in a compression-tension sequence than vise versa. This difference in the composite constitutive response is generally referred to as the asymmetric composite BE. In this investigation, finite element method (FEM) modeling was performed to examined the cyclic stress-strain responses form an annealed SiC whisker (SiC[sub w]) reinforced 6061 Al composite, where the effect of [Delta]CTE and [Delta]T was considered. The thermal history of the composites was represented by a slow cooling from 500C to room temperature. The changes of the composite BSF as a function of the forward applied strain were studied, and a simple analytical model was developed to understand the influence of the TRS.

• OSTI ID: 5723490
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 24:8; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALUMINIUM
ANNEALING
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
CRYSTALS
ELASTICITY
ELEMENTS
FLOW STRESS
HEAT TREATMENTS
MATERIALS
MECHANICAL PROPERTIES
METALS
MONOCRYSTALS
PARAMETRIC ANALYSIS
PLASTICITY
SILICON CARBIDES
SILICON COMPOUNDS
STRAINS
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TENSILE PROPERTIES
THERMOELASTICITY
WHISKERS