The Effect of Ultrasonic Treatment on Microstructural and Mechanical Properties of Cast Magnesium Alloys

NCU Institutional Repository > 工學院 > 機械工程研究所 > 期刊論文 > Item 987654321/26899

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/26899

题名:	The Effect of Ultrasonic Treatment on Microstructural and Mechanical Properties of Cast Magnesium Alloys
作者:	Chen,YJ;Hsu,WN;Shih,JR
贡献者:	機械工程研究所
关键词:	ACOUSTIC CAVITATION SERIES;ALUMINUM A356 ALLOY;OXIDE-FILMS;SONOCHEMISTRY;SOLIDIFICATION;VIBRATION;PROSPECTS
日期:	2009
上传时间:	2010-06-29 18:02:47 (UTC+8)
出版者:	中央大學
摘要:	Magnesium alloys are important light metals. In recent years, they have been widely applied in the aerospace and automotive industries, and in the manufacture of communication devices, consumer-electronics appliances and computer products. However, cast magnesium and magnesium alloys are subject to problems due to gas pores, inclusion particles, oxide films, and so on. How to reduce the harm caused by these defects and refine the structure to improve casting quality has become an important topic. In this study, we evaluate the effect on casting quality of an ultrasonic method for treating the melt. The method is based on the generation of cavitation bubbles from ultrasonic treatment of the melt, which induces dispersion and degassing action. Analysis of the microstructure and determination of the mechanical properties of the resultant castings are the basis for identifying the quality of the magnesium and magnesium alloys. The microstructure was evaluated using an optical microscope and scanning electron microscopy (SEM). The elemental constituents of the inclusion particles and oxide films were identified using scanning electron microscopy in conjunction with an X-ray energy dispersive spectrometer and electron probe microanalyzer (EPMA). Finally, the mechanical properties of the magnesium and magnesium alloys, including the tensile strength, the elongation and the hardness, were also determined and discussed. In addition, variations in mechanical properties of cast aluminum and magnesium alloys by ultrasonic treatment are also discussed. [doi:10.2320/matertrans.MER2008273]
關聯:	MATERIALS TRANSACTIONS
显示于类别:	[機械工程研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	331	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....