Abstract: Adequate control of composition, cooling rates, and heat treatment parameters is crucial to achieving the desired ultrafine microstructure and properties in copper-based alloys. In this experimental study, an ultrafine Cu-3Si-Al and Cu-3Si-Mo ternary alloy with improved tensile strength and hardness is developed. The alloys system were developed via stir-casting technique and subjected to solid solution heat treatment at 900oC for 5 h. The microstructures of the ternary alloys were analyzed and correlated with the investigated mechanical properties. Results showed that Cu-3Si-3Al alloy recorded ultimate tensile strength and hardness of 314 MPa and 278 BHN in as-cast condition. Incorporation of molybdenum to the parent alloy significantly increased the ultimate tensile strength, percentage elongation, and hardness. As-cast Cu-3Si-3Mo alloy recorded ultimate tensile strength and hardness of 130 MPa and 192 BHN, respectively. After solution heat treatment, ultimate tensile strength and hardness of Cu-3Si-3Al alloy increased from 314 MPa to 322 MPa, and from 192 BHN to 201 BHN. On the same condition, Cu-3Si-3Mo alloy recorded about 29.2% and 4.7% increase in ultimate tensile strength and hardness compared to the as-cast Cu-3Si-3Mo alloy. This mechanical behavior can be attributed to increased solid solution region and fine grains accompanying increasing addition of aluminium and molybdenum.
Keywords: Solid solution; microstructure; properties; tensile strength; hardness.
Title: Solid solution-induced ultrafine Cu-3Si-Al and Cu-3Si-Mo ternary alloy
Author: Agatha I. Ijomah, Kingsley C. Nnakwo, Nkem E. Nwankwo, Bonaventure C. Ugwuanyi
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
Vol. 11, Issue 3, July 2023 - September 2023
Page No: 59-63
Research Publish Journals
Website: www.researchpublish.com
Published Date: 15-September-2023
