The relationship of flow stress to the interparticle path of two phase alloy systems is discussed and the similarity of two phase alloy systems to wire or fiber reinforced composites is described. Experiments were performed on iron wire reinforced 6061 aluminum alloys which show that the flow stress in these systems can be expressed by a similar relationship as documented for two phase alloy systems, namely, σflow = C1 log λ + C2, where C1 and C2 are constants, σflow is the flow stress, and λ is the interwire spacing within 4, 6, and 8 wire aluminum alloy composites.

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