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Application of QFA coupled with CFD analysis to predict the hardness of T6 heat treated Al6061 cylinder

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Abstract

QFA (quench factor analysis) method is widely used to predict the mechanical properties such as hardness and strength according to temperature of quenched material that has to be determined by experimental heat treatment. But, QFA coupled with CFD (computational fluid dynamics) analysis of this study can predict the mechanical properties without the experiment of heat treatment except the experiment to determine the material constants of QFA. First of all, Jominy test and FPS (flexible polyhedron search) are performed to determine the material constants of QFA. The CFD analysis is applied to predict the cooling temperature of Al6061 cylinder cooled by water of 25°C during quenching of solid solution heat treatment. Hardnesses of T6 heat treated Al6061 cylinder is predicted by the QFA coupled with CFD analysis without experiment of heat treatment and then the predicted hardnesses are compared with experimentally measured hardnesses according to positions of cylinder. The predicted hardnesses of cylinder are in good agreement with the measured ones within a maximum error of 8.45%.

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Authors and Affiliations

  1. Precision Manufacturing System Division, Pusan National University, 30 Jangjeon-Dong, Geumjeong-Gu, Busan, 609-735, Korea

    Dae-Hoon Ko

  2. Industrial Liaison Innovation Center, Pusan National University, 30 Jangjeon-Dong, Geumjeong-Gu, Busan, 609-735, Korea

    Dae-Cheol Ko

  3. Defense Product Technical Research Laboratory, Poongsan Co., Angang-Oup, Kyung-Ju, Kyung-Buk, 780-805, Korea

    Hak-Jin Lim

  4. Department of Mechanical Engineering, Pusan National University, 30 Jangjeon-Dong, Geumjeong-Gu, Busan, 609-735, Korea

    Byung-Min Kim

Authors
  1. Dae-Hoon Ko
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  2. Dae-Cheol Ko
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  3. Hak-Jin Lim
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  4. Byung-Min Kim
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Corresponding author

Correspondence to Byung-Min Kim.

Additional information

Recommended by Editor Sung-Lim Ko

Dae-Hoon Ko is currently a Ph.D. candidate at the Precision Manufacturing Systems Division at Pusan National University in Busan, South Korea. His current research interests hot extrusion and heat treatment of aluminum alloys. Byung-Min Kim received his B.S., M.S. and Ph.D. degrees from Pusan National University, South Korea, in 1979, 1984 and 1987, respectively. He is currently a professor at the School of Mechanical Engineering at Pusan National University in Busan, Korea.

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Ko, DH., Ko, DC., Lim, HJ. et al. Application of QFA coupled with CFD analysis to predict the hardness of T6 heat treated Al6061 cylinder. J Mech Sci Technol 27, 2839–2844 (2013). https://doi.org/10.1007/s12206-013-0732-4

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  • DOI: https://doi.org/10.1007/s12206-013-0732-4

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