LOW-FREQUENCY DAMPING BEHAVIOR OF PURE MG PROCESSED BY EQUAL CHANNEL ANGULAR PRESSING
LOW-FREQUENCY DAMPING BEHAVIOR OF PURE MG PROCESSED BY EQUAL CHANNEL ANGULAR PRESSING
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DOI：
10.1142/s021797920906169x
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发表时间：
2009-03
影响因子：
1.7
通讯作者：
G. Fan;M. Zheng;X. Hu;H. Chang;Kai Wu
中科院分区：
文献类型：
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作者：
G. Fan;M. Zheng;X. Hu;H. Chang;Kai Wu
在250°C下对挤出的纯镁进行4道次的等通道转角挤压（ECAP）。ECAP处理后，晶粒尺寸显著细化。在低应变幅下，材料的阻尼性能有所提高，而在高应变幅下，材料的阻尼性能有所下降。在高温下的阻尼能力的测量期间观察到三个峰。讨论了纯镁在室温和高温下的阻尼机理。
Equal channel angular pressing (ECAP) was performed on the extruded pure magnesium at 250°C for 4 passes. After ECAP processing, the grain size was significantly refined. And the damping capacity was increased at low strain amplitudes, but decreased at high strain amplitudes. Three peaks were observed during the measurement of damping capacity at elevated temperatures. The mechanisms for damping capacity of pure Mg at ambient and elevated temperatures were discussed.