Abstract
ABSTRACT The present paper is concerned with the formability of alloys in the partly liquid state at the temperatures exceeding the solidus point. The process of upsetting 0f cylindrical specimens is investigated. The prime objective of the paper is to investigate the factors which influence the softening of the material subjected to plastic deformation in the part-liquid state. The aluminum alloy (containing 13.7% Mg) of a relatively large crystallization temperature range has been used as a testing material. The investigation focused on the effect of the solid fraction (weight percentage of solid component in the alloy, pre-heated to the temperature above its solidus point) on the process parameters. The results are compared with the earlier investigation for the aluminum alloy containing 5.7% Cu and an attempt of the generalization of the problem is done. Thermal-mechanical finite-element model developed for the compression process and adapted to the partly liquid conditions is used for the calculations of distributions of strain rates, strains and temperatures.
Published Version
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