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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Microstructure, tensile properties and fracture behavior of high temperature Al-Si-Mg-Cu cast alloys
Materials Science and Engineering: A, Volume 577, Year 2013
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Description
The high temperature tensile behavior of 354 aluminum cast alloy was investigated in the presence of Zr and Ni. The cast alloys were given a solutionizing treatment followed by artificial aging at 190°C for 2h. High temperature tensile tests were conducted at various temperatures from 25°C to 300°C. Optical microscopy and electron probe micro-analyzer were used to study the microstructure of different intermetallic phases formed. The fractographic observations of fracture surface were analyzed by scanning electron microscopy to understand the fracture mechanism. The results revealed that the intermetallics phases of (Al, Si)3(Zr, Ti), Al3CuNi and Al9NiFe are the main feature in the microstructures of alloys with Zr and Ni additions. The results also indicated that the tensile strength of alloy decreases with an increase in temperature. The combined addition of 0.2wt% Zr and 0.2wt% Ni leads to a 30% increase in the tensile properties at 300°C compared to the base alloy. Zr and Ni bearing phases played a vital role in the fracture mechanism of the alloys studied. © 2013.
Authors & Co-Authors
Mohamed, A. M.A.
Qatar, Doha
Qatar University
Egypt, Ismailia
Faculty of Engineering
Samuel, Fawzy Hosny
Canada, Chicoutimi-jonquiere
Université du Québec à Chicoutimi
kahtani, Saleh Al
Saudi Arabia, Al Kharj
Prince Sattam Bin Abdulaziz University
Statistics
Citations: 119
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1016/j.msea.2013.03.084
ISSN:
09215093