Effect of arc-bending deformation on amplitude-dependent damping in pure magnesium

Effect of arc-bending deformation on amplitude-dependent damping in pure magnesium
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纯镁中弧形弯曲变形对振幅相关阻尼的影响

DOI:
10.1016/j.msea.2014.07.078
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发表时间:
2014-10
影响因子:
6.4
通讯作者:
Zhongshan Wu
Zhongshan Wu
中科院分区:
材料科学1区
文献类型:
--
作者:
Ruopeng Lu;Dezhao Qin;Wenxiang Yang;Zhongshan Wu

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研究了一种提高镁合金阻尼性能的加工工艺。在圆柱模型上弯曲并在300 °C下退火10 h的Mg试样比纯Mg具有更好的幅值依赖阻尼性能。这种弧形弯曲变形可以通过弯曲次数和圆筒直径来控制。热处理对变形量较大的纯镁弯弧性能的影响更为显著。在退火试样中观察到大量的位错,这些位错几乎彼此平行排列,这在退火和锻造的Mg中不能获得。根据G-L模型,试样的高阻尼能力得益于长的,平行的位错配置的形成,和几乎微观配置阻碍合金中的位错运动。
A processing technology to improve the damping capacity in Mg alloys is studied in this work. The Mg specimens bent on cylinder models and then annealed at 300 °C for 10 h can have a better amplitude-dependent damping property than pure Mg. This arc-bending deformation can be controlled by the number of bending times and cylinder diameter. The arc-bending pure Mg with larger deformation is more significantly affected by heat treatment. A large number of dislocations aligned nearly parallel to each other are observed in the annealed specimens, which cannot be obtained in the annealed and forged Mg. According to the G–L model, the high damping capacity of the specimens profited from the formation of long, parallel dislocation configurations, and barely microscopic configurations impede dislocation movement in the alloy.
DOI: 10.1016/0001-6160(83)90107-4
发表时间: 1983-02
期刊: Acta Metallurgica
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