EFFECTS OF BE AND FE ADDITIONS ON THE MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF A357.0 ALLOYS

NCU Institutional Repository > 工學院 > 機械工程研究所 > 期刊論文 > Item 987654321/27066

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27066

題名:	EFFECTS OF BE AND FE ADDITIONS ON THE MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF A357.0 ALLOYS
作者:	TAN,YH;LEE,SL;LIN,YL
貢獻者:	機械工程學系
關鍵詞:	SI-MG ALLOYS
日期:	1995
上傳時間:	2010-06-29 18:06:52 (UTC+8)
出版者:	中央大學
摘要:	A357 hypoeutectic alloy is a heat-treatable Al-Si-Mg system with a nominal composition of Al-7 pet Si and about 0.6 pet Mg have widespreaded applications, especially in the aerospace and automotive industries. The purpose of this study was to determine the influences of Be and Fe content on the microstructure and mechanical properties of A357.0 alloys. Distinct morphologies were discerned between Be-containing and Be-free alloys. The Be-free alloys contain larger amount of iron-bearing phases with Mg than in Be-containing alloys. The addition of Be can change the plateletlike structure of iron-bearing phases to a comparatively harmless round nodular form. Also, the amounts of iron-rich phases are significantly lower and the silicon particles are smaller and more spherical in the Be-containing alloys. Small amounts of Be in A357.0 caused significant increases in the precipitation kinetics of Mg2Si. It was found that the addition of Be lowers the ternary and binary eutectic melting point. The amount of Mg available to form the major strengthening phase Mg2Si is increased promoting the tensile strength of A357.0 casting. The tensile properties were improved with decreasing Fe content and the addition of Be. The effect is more apparent in the higher Fe alloys than that in the lower Fe alloys.
關聯:	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
顯示於類別:	[機械工程研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	475	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....