Combined effect of high-intensity ultrasonic treatment and Ca addition on modification of primary Mg 2 Si and wear resistance in hypereutectic Mg–Si alloys

Autor:	M. A. Waly, A.M. El-Sheikh, M.E. Moussa
Rok vydání:	2014
Předmět:	Materials science Mechanical Engineering High intensity Alloy Metallurgy Metals and Alloys engineering.material Microstructure Wear resistance Mechanics of Materials Materials Chemistry engineering Metallography Ultrasonic sensor Composite material
Zdroj:	Journal of Alloys and Compounds. 615:576-581
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2014.06.154
Popis:	The combined effect of high-intensity ultrasonic treatment (HIUST) and 0.3 wt.%Ca addition on modification of primary Mg 2 Si and wear resistance in the hypereutectic Mg–5 wt.%Si alloy has been investigated. The results show that without treatment, the dendrites of primary Mg 2 Si are coarse and non-uniform in size. With HIUST or 0.3 wt.%Ca addition, nearly fine uniform and polyhedral shape of primary Mg 2 Si are achieved. Interestingly, modification and refinement of primary Mg 2 Si arise from the combined effect of HIUST and 0.3 wt.%Ca addition. The sample due to combined effect of HIUST and 0.3 wt.%Ca addition has the best wear resistance due to the lowest weight loss among all the other samples for various loads (10, 30 and 50 N) at constant sliding speed (0.3 m/s). Modification mechanisms resulting in the development of microstructures are also investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f7f475d940aac126480f351c7f87aa0c https://doi.org/10.1016/j.jallcom.2014.06.154 Zobrazit plný text záznamu Full Text from ScienceDirect