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In general, the flow stress of metals and alloys is expressed as the sum of an internal stress and an effective stress. Here, the internal stress is athermal stress, which is based on long range inter...action between dislocations or dislocations and dispersed particles, and does not depend on temperature and strain rate. On the other hand, the effective stress is thermal stress, which is based on short range interaction between dislocations or dislocation and solute atoms, and strongly depends on temperature and strain rate. In this paper, it is reviewed that the high temperature deformation of solution hardened alloy is controlled by the solute atmosphere dragging mechanism of dislocations, and that the effective and internal stresses respectively equal to the solute atmosphere dragging stress for dislocation motion and the athermal stress derived from the attractive junctions formed by dislocation interaction.続きを見る
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