MATEC Web Conf.
Volume 207, 2018International Conference on Metal Material Processes and Manufacturing (ICMMPM 2018)
|Number of page(s)||5|
|Section||Material Science Engineering|
|Published online||18 September 2018|
T-phase formation and its effect on mechanical properties of Al-Cu-Mn alloys
School of Materials Science & Engineering, Southeast University, Jiangsu Key Laboratory for Advanced Metallic Materials, Nanjing 211189, China
a Corresponding author: email@example.com
Al-Cu-Mn alloys are used in components in automotive and aircraft industry which work at high temperature. Recent research is focused on Al-Cu-Mn alloys to enhance their performance by promoting the formation of thermally stable phase particles. In this study, the effect of Cu/Mn content on microstructure and mechanical properties of two Al-Cu-Mn alloys (Cu/Mn wt.% ratio = 5.56, 2.75) is investigated by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy and tensile testing. Results reveal that as-cast microstructure of both the alloys consists of trunks of α-Al dendrites surrounded by Cu-rich interdendritic region. After solution treatment, a great amount of Al-Cu-Mn intermetallic compound particles are found to precipitate adjacent to this region. Alloy with low Cu/Mn content ratio exhibits high strength due to relatively high amount of Al-Cu-Mn (T-phase) particles.
© The Authors, published by EDP Sciences, 2018
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