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Grain refinement and mechanical properties of Al-Cu-Ti alloys after different melt heat treatment processes
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University of Jinan

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National Natural Science Foundations of China (Grants Nos. 51772132);Natural Science Foundation of Shandong Province of China (ZR2019MEM019)

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    Abstract:

    In this study, the modification of Al-Cu alloy by adding grain refiner combined with different heat treatments (superheat treatment and thermal rate treatment) is investigated. The phase composition, solidification microstructure and mechanical properties of Al-Cu-Ti alloys are analyzed. Moreover, the melt structure transformation of Al-Cu-Ti alloys after different melt heat treatments was studied by DSC. The experimental results showed that the thermal rate treatment greatly refined the grain of Al-Cu-Ti alloy and improved the mechanical properties. Through the analysis of thermodynamic phase transition, it was found that the latent heat of fusion of Al-Cu-Ti alloy after superheat treatment and thermal rate treatment became smaller due to the increase of interfacial energy, which leads to refine the microstructure of alloy to some extent.

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[Wang Lin, Sun Yu, Bo Lin, Zuo Min, Zhao Degang. Grain refinement and mechanical properties of Al-Cu-Ti alloys after different melt heat treatment processes[J]. Rare Metal Materials and Engineering,2020,49(8):2615~2622.]
DOI:10.12442/j. issn.1002-185X.20190444

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History
  • Received:May 24,2019
  • Revised:August 18,2019
  • Adopted:September 06,2019
  • Online: September 27,2020
  • Published: