COMPARISON BETWEEN THE EXPERIMENTAL AND THEORETICAL TENSILE BEHAVIOR OF ALUMINUM-BASED METAL-MATRIX COMPOSITES REINFORCED WITH PREFORMS OF ALPHA-ALUMINA PLATELETS
V. Massardier et al., COMPARISON BETWEEN THE EXPERIMENTAL AND THEORETICAL TENSILE BEHAVIOR OF ALUMINUM-BASED METAL-MATRIX COMPOSITES REINFORCED WITH PREFORMS OF ALPHA-ALUMINA PLATELETS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 203(1-2), 1995, pp. 93-104
In this article, the tensile behaviour of an aluminium matrix composit
e reinforced with new preforms of ct-alumina platelets was studied bot
h from an experimental and a theoretical point of view. The investigat
ed composite characterized by a well-defined microstructure allowed us
to establish a comparison between the experimental and theoretical ev
olutions and to check the ability of Eshelby-type theoretical models t
o assess the tensile properties of a particulate metal matrix composit
e. The analysis of the tensile properties was focused on the interpret
ation of Young's modulus and on the 0.2% proof stress of the composite
, considering successively the effect of the variable parameters of th
e reinforcement on these two tensile characteristics. Young's moduli w
ere assessed by an iterative Eshelby method developed in our laborator
y and likely to take into account all the parameters defining the micr
ostructure of the investigated composite; 0.2% proof stresses were ana
lyzed by a hybrid model based both on dislocation mechanics and on the
iterative Eshelby method.