Influence of Ti, B and Sr on tribological properties of A356 alloy

Autor:	K. R. Udupa, D. G. Mallapur, S. A. Kori
Rok vydání:	2011
Předmět:	Equiaxed crystals Materials science Silicon Mechanical Engineering Metallurgy Abrasive Alloy chemistry.chemical_element Tribology engineering.material Microstructure chemistry Structural change engineering General Materials Science Eutectic system
Zdroj:	Tribology - Materials, Surfaces & Interfaces. 5:34-42
ISSN:	1751-584X 1751-5831
DOI:	10.1179/1751584x11y.0000000001
Popis:	The wear behaviour of an A356 alloy has been investigated in this paper. To understand the wear behaviour of the materials, the experiments were carried out using a pin on disc testing machine at various combinations of normal pressure, sliding speed and sliding distances. Tribological results reveal that weight loss of A356 alloy increases with increasing normal pressure and decreases with increasing sliding speed. Also, the results at microlevel revealed a structural change from coarse columnar dendrites to fine equiaxed ones on the addition of grain refiner (Al and B) and furthermore, plate-like eutectic silicon to fine particles on addition of modifier (Sr). It is further noted in the present study that addition of modifier does not disturb the influence of grain refiner and vice versa. Abrasive wear mechanism was interrupted by the formation of microwelds and later by oxidation of the Al matrix.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11ba9cd69c40a6cb56288af48763c913 https://doi.org/10.1179/1751584x11y.0000000001 Zobrazit plný text záznamu