Constitution and hardnesses of the Al–Ir system

Autor:	L.A. Cornish, M. J. Witcomb, P.J Hill
Rok vydání:	1998
Předmět:	Materials science Scanning electron microscope Mechanical Engineering Metallurgy Metals and Alloys Intermetallic Analytical chemistry Brittleness Fracture toughness Congruent melting Mechanics of Materials Vickers hardness test Materials Chemistry Eutectic system Phase diagram
Zdroj:	Journal of Alloys and Compounds. 280:240-250
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(98)00748-8
Popis:	The Al–Ir phase diagram was investigated using optical and scanning electron microscopy, and X-ray diffraction. The results were found to agree with published literature, with the exception of the congruent melting of Al2.7Ir and a previously unreported eutectic reaction to form Al2.7Ir and AlIr. The AlIr and Al2.7Ir phases had the widest composition ranges: 47–53 and 23–30 at.% Ir respectively. Mechanical tests, in the form of Vickers hardness tests were used to deduce the fracture toughness of the alloys. It was found that the high Al-content intermetallic compounds were very brittle, and the alloys containing AlIr were tougher. This compound was tougher on the Ir-rich side, especially when there was a small amount of the AlIr+(Ir) eutectic between the AlIr dendrites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e49df7c3deed767373b97eb25c2a1633 https://doi.org/10.1016/s0925-8388(98)00748-8 Zobrazit plný text záznamu Full Text from ScienceDirect