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Open AccessArticle

Influence of Homogenization on Microstructural Response and Mechanical Property of Al-Cu-Mn Alloy

1
School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China
2
Key Construction Laboratory of Green Forming and Equipment from Jiangsu Province, Changzhou 213001, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 914; https://doi.org/10.3390/ma11060914
Received: 16 April 2018 / Revised: 21 May 2018 / Accepted: 24 May 2018 / Published: 29 May 2018
The evolution of the microstructures and properties of large direct chill (DC)-cast Al-Cu-Mn alloy ingots during homogenization was investigated. The results revealed that the Al-Cu-Mn alloy ingots had severe microsegregation and the main secondary phase was Al2Cu, with minimal Al7Cu2Fe phase. Numerous primary eutectic phases existed in the grain boundary and the main elements were segregated at the interfaces along the interdendritic region. The grain boundaries became discontinuous, residual phases were effectively dissolved into the matrix, and the segregation degree of all elements was reduced dramatically during homogenization. In addition, the homogenized alloys exhibited improved microstructures with finer grain size, higher number density of dislocation networks, higher density of uniformly distributed θ′ or θ phase (Al2Cu), and higher volume fraction of high-angle grain boundaries compared to the nonhomogenized samples. After the optimal homogenization scheme treated at 535 °C for 10 h, the tensile strength and elongation% were about 24 MPa, 20.5 MPa, and 1.3% higher than those of the specimen without homogenization treatment. View Full-Text
Keywords: Al-Cu-Mn alloy; homogenization; microstructures response; mechanical property Al-Cu-Mn alloy; homogenization; microstructures response; mechanical property
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MDPI and ACS Style

Wang, J.; Lu, Y.; Zhou, D.; Sun, L.; Li, R.; Xu, W. Influence of Homogenization on Microstructural Response and Mechanical Property of Al-Cu-Mn Alloy. Materials 2018, 11, 914.

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