期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 528, 期 25-26, 页码 7484-7487出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.06.072
关键词
Ultrasonic vibration; Solution heat treatment; Phase Mg17Al12; Tensile properties
类别
资金
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.201130]
Ultrasonic vibration with frequency of about 20 kHz and power of 350W was introduced into molten AZ91 alloy. After ultrasonic vibration, morphology of the phase Mg17Al12 formed during the cooling and solidification varied from coarse plates to lamellar precipitates. With application of solution heat treatment, the phase Mg17Al12 was mostly dissolved in both the alloy with ultrasonic vibration and without ultrasonic vibration. The ultimate tensile strength and the elongation to fracture of the alloy were significantly increased after ultrasonic vibration. After solution heat treatment the tensile strength of the alloy without ultrasonic vibration increased remarkably while the alloy with ultrasonic vibration increased slightly. (C) 2011 Elsevier B.V. All rights reserved.
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