Abstract
Locally prepared and homogenized Ag10at.%Al wires were quenched from 400°C to room temperature and were then given different aging treatments at temperatures in the precipitation zone to obtain samples with different amounts of μ phase precipitation. Room temperature steady state creep and microhardness measurements were made to assess the degree of precipitation in the samples. Increased precipitation of the μ phase was found to decrease the strain rate and to increase the hardness. The energy activating the process, which was deduced from the creep and hardening tests, was found to be on average about 3.5±0.5 kcal mol −1. This low value for the activation energy characterizing the precipitation process was attributed to the possible enhancement of precipitation by the quenched vacancies. X-ray analysis after creep fracture showed a remarkable decrease in the line intensities, indicating the destruction of the ordered structure of the μ phase, i.e. the partial redissolution of this phase.
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