【摘要】 <正> 本文采用专用的实验装置研究了应变速率对A1～4%Cu合金凝固过程中准固态的强度、强度增长率和断裂应变的影响。分析了准固态力学性能与应变速率的关系。研究结果表明,A1-4%Cu合金的强度和强度增长率随着应变速率的增加而升高,并发现随着应变速率的增加合金在凝固过程中开始具有可测强度的温度升高,因此为了准确地测定合金的准固相线应变速率必须高于某一临界值。更多还原

【Abstract】 In this paper strength, rate of strength increase and failure strain ofA1-4%Cu alloy in quasi-solid during solidification are investigated withspecial apparatus. The relationship between the mechanical properties ofAl-4%Cu alloy in the quasi-solid and strain rate is analyzed. Resultsobtained show that with the increase of the strain rate the strength andfailure strain increase, and the temperature, at which the metal just beg-ins to possess measurable strength, increases. There is a critical valueon the strain rate in accurate measure of quasi-solidus.更多还原