研究了不同退火时间对Mg-0.6Zr热轧板材阻尼性能的影响.结果表明:350℃×3h的退火工艺使合金发生了完全再结晶,同时退火后的强度和硬度有所下降,而延伸率有所提高.合金在热轧态下的阻尼性能很低,且几乎与应变振幅无关;退火处理后,合金的阻尼性能得到明显提高,且随退火时间的延长而增大,完全再结晶后,阻尼性能几乎不再随退火时间的延长而变化,此时阻尼性能与应变振幅有关,即随应变振幅的提高而不断提高,尤其是在高应变振幅下.Mg-0.6Zr系合金上述阻尼性能的变化可以用Granato-Lüicke位错钉扎模型来解释.
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