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Creep in an Al-5356 solid solution alloy with an intercept grain size, dE=5±0.5um was in-vestigated using the helicoid spring specimen technique. The testing temperatures ranged from 423 K to 523 K (0....47 to 0.58 Tm) and the applied stresses from 0.20 MPa to 4.04 MPa. It was found that under the above conditions, viscous creep of Bingham type occurs, characterized by a threshold stress which decreases with increasing temperature. The activation energy is Qc = 44±7 kJ/mol. No microstructural changes were observed in recrystallized and the as-crept specimens. The meas-ured creep rates were found to be four orders faster than that predicted by Coble creep model.続きを見る
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Mendeley出力
