中文摘要：

ZA27 合金被与永久模子扔准备然后为 1 在 250 掳 C 退火了—4h。合金的抑制能力基于伸臂横梁技术用一台严峻的仪器被测量。当演员组 ZA27 合金拥有与 1.3 ×的价值抑制能力的高度，这被发现在 320Hz 的 10 ⁻³ 。在为 1h 在 250 ° C 退火了以后，抑制能力减少到 1.1 × 10 ⁻³ 然后遗体常数甚至当退火的时间被增加到 4h 时。当演员组 ZA27 合金的微观结构由 Al 富有的主要 α-phases 的大树突组成，类低共熔体(α +η ) 并且非，平衡 eutectic 分阶段执行(α +η +) 。在在 250 点退火以后，为阶段的° C 由于溶解消失进矩阵，并且在类低共熔体的薄片之间的间距增加。退火的时间的另外的增加在间距上有小效果。合金的抑制机制就抑制的 thermoelastic 和抑制的缺点而言被讨论。抑制的 thermoelastic 的价值说明仅仅 7%8% 在在伸臂抑制的外套微笑抑制大小和 ZA27 合金的抑制能力主要来自缺点抑制。

英文摘要：

ZA27 alloy was prepared by casting with permanent mold and then annealed at 250℃ for 1-4h. The damping capaciG of the alloy was measured using a testing apparatus based on the cantilever beam technique. It was found that the as-cast ZA27 alloy possesses high damping capacity with the value of 1.3 × 10^4 at 320Hz. After annealed at 250℃ for lh, the damping capacity decreases to 1.1 × 10^-3 and then remains constant even when the annealing time is increased to 4h. The microstructure of the as-cast ZA27 alloy consists of large dendrites of Al-rich PrimaG （x-phases, eutectoid （α ＋ η） and nonequilibrium eutectic phases （α ＋ η ＋ ε）. After annealing at 250℃ for lh, the e phase disappears due to dissolution into the matrix, and the spacing between the flakes of eutectoid increases. The further increase in the annealing time has little effect on the spacing. The damping mechanism of the alloy was discussed considering the thermoelastic damping and defect damping. The value of thermoelastic damping accounts only for 7%-8% in the overall damping in cantilever beam damping measurements and the damping capacity of the ZA27 alloy came mainly from defect damping.