2018/05/03 by Yuliang Zhao, Zhi Wang, Zhao, Yuliang +5
Engineering · Materials Science · Physics and Astronomy · #74AXX #Aluminum Alloy Microstructure Properties #Aluminum Alloys Composites Properties #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Microstructure and mechanical properties #cond-mat.mtrl-sci #msc:74AXX
paper · pdf · doi:10.48550/arxiv.1805.01100
27 pages, 13 figures
arxiv created 2018/05/03 · openalex publication_date 2018/05/03 · arxiv updated 2018/05/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The influence of Fe content on the three-dimensional (3D) morphology of Fe-rich intermetallic phases (Fe phases), Al2Cu, and pores and mechanical properties of cast Al-5.0Cu-0.6Mn alloys with 0.5 and 1.0 wt. % Fe are characterized using synchrotron X-ray tomography and a tensile test. The results show that both Fe phases and Al2Cu exhibit a complex 3D network structure, and the pores are irregular with complex interconnected and near-globular shape. As the Fe content increases from 0.5 % to 1.0 %, the volume fraction and equivalent diameter of Fe phases decrease, whereas both their interconnectivities decrease. Skeletonization analysis shows that the Chinese-script-shaped Fe phase is compacted than the plate-like Fe phases. The equivalent diameter and sphericity of pores vary with Fe content, and their relationships follow exponential functions, Y = 7.14*X-1.29 and Y = 7.06*X-1.20, respectively. The addition of Fe results in a decrease in the ultimate tensile strength and elongation from 223.7 MPa to 199.8 MPa and from 5.51 % to 3.64 %, respectively, owing to increasing volume fraction of sharp-edged Fe phases and pores, resulting in stress concentration during tensile test.