Microstructure-Property Relationships in an Erbium-Modified Al-Si-Mg Alloy
- سال انتشار: 1399
- محل انتشار: مجله علم مواد و مهندسی ایران، دوره: 17، شماره: 3
- کد COI اختصاصی: JR_IJMSEI-17-3_005
- زبان مقاله: انگلیسی
- تعداد مشاهده: 195
نویسندگان
Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, P.O. Box: ۹۸۱۳۵-۹۸۷, Iran
Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, P.O. Box: ۹۸۱۳۵-۹۸۷, Iran
Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, P.O. Box: ۹۸۱۳۵-۹۸۷, Iran
چکیده
The effects of erbium (Er) addition at various weight percentages (۰-۰.۶ wt.% at an interval of ۰.۲) on the microstructural characteristics, tensile response and wear properties of as-cast Al-۷.۵Si-۰.۵Mg alloy were evaluated. The microstructure of samples was examined by X-ray diffraction, optical microscopy and scanning electron microscopy. The obtained results demonstrated that the incorporation of erbium obviously decreased the α-Al grain size and eutectic Si, and altered the Si morphology from plate to semi-globular. Further addition of erbium (> ۰.۲ wt.%) did not alter the eutectic morphology and size. Moreover, the Al۳Er phase was also observed in the eutectic region after modification. Out of the erbium contents used, ۰.۲ wt.% erbium showed the best influence on the tensile and wear properties. Compared with those of unmodified specimen, the values of ultimate tensile strength and elongation were enhanced by ۳۱% and ۳۹%, respectively with the introduction of ۰.۲ wt.% erbium. Additionally, a remarkable enhancement in the wear properties was observed with the addition of ۰.۲ wt.% erbium.کلیدواژه ها
Al-Si-Mg alloy, Erbium, Eutectic Si, Microstructure, Tensile properties, Wearاطلاعات بیشتر در مورد COI
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