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Iranian Journal of Materials Science and Engineering، جلد ۱۷، شماره ۳، صفحات ۴۹-۵۹
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عنوان انگلیسی The Wear Behavior of a Cast Al-20wt%Mg2Si Composite Thixoformed Via SIMA
چکیده انگلیسی مقاله Aluminum matrix composites are candidate materials for aerospace and automotive industries owing to their specific properties such as high elastic modulus (E), improved strength and low wear rate. The effect of thixoforming process on the wear behavior of an Al-Mg2Si composite was studied in this paper. During applying thixoforming process, casting defects  such as macrosegration, shrinkage and porosity are being effectively reduced. These advantages are sufficient to attract more exploration works of thixoforming operation. Thermal analysis of the composite, as-cast microstructure, wear surface and subsurface area of the thixoformed alloy were  investigated. Wear behavior of  the specimens were examined using a pin-on-disk machine  based on ASTM-G99, at the applied loads of 25, 50 and 75 N and the constant sliding velocity of 0.25m/s. The worn surfaces and subsurfaces were examined by scanning electron microscopy (SEM). The experimental results indicated that the thixoformed specimens exhibited superior wear resistance than the as-cast alloy. Moreover, the dominant wear mechanism is an adhesive wear followed by the formation of a mechanical mixed layer (MML). However, a severer wear regime occurs in the as cast specimens compared with the thixoformed ones
کلیدواژه‌های انگلیسی مقاله Keywords, Al-Mg2Si Alloy,SIMA,Semi-solid forming,Thixoforming,Wear test.
نویسندگان مقاله | M. Hamdi


| H. Saghafian Larijani
School of Materials and Metallurgical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran


| S. G. Shabestari


| N. Rahbari


نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-43-3&slc_lang=en&sid=1
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زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده گروه ریخته گری و انجماد
نوع مقاله منتشر شده Research Paper
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