Microstructure and Mechanical Properties of Eco-2024-T3 Aluminum Alloy
2012; Trans Tech Publications; Volume: 602-604; Linguagem: Inglês
10.4028/www.scientific.net/amr.602-604.623
ISSN1662-8985
AutoresSeon Ho Kim, Kyu‐Sik Kim, Shae K. Kim, Young Ok Yoon, Kyu Sang Cho, Kee‐Ahn Lee,
Tópico(s)Advanced Welding Techniques Analysis
ResumoIn this study, the microstructures and mechanical properties of the recently developed Eco-2024-T3 alloy were examined. Eco-2024 is made using Eco-Mg (Mg-Al 2 Ca) in place of element Mg during the manufacture of alloy 2024-T3. This is an alloy that has economic advantage and excellent properties. Alloy Eco-2024 showed smaller crystal grains that were distributed more evenly compared to the existing alloy 2024-T3. It consisted of Al matrices containing minute amounts of Al 2 CuMg, Al 2 Cu, and Ca phases and showed microstructures with reduced amounts of Fe phases or oxide. As a result of tensile tests, this alloy exhibited yield strength of 413 MPa, tensile strength of 527 MPa, and elongation of 15.4%. In other words, it showed higher strength than the existing alloy 2024 but was similar to the existing alloy 2024 in terms of elongation. In fatigue tests, alloy Eco-2024-T3 recorded fatigue limit of 330 MPa or around 80% of its yield strength; this is a much more excellent property compared to the existing alloy 2024-T3, which has fatigue limit of 250 MPa. Based on the aforementioned results, the correlation between the excellent mechanical properties of alloy Eco-2024-T3 and its microstructure was examined.
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