Effect of Quenching Medium on Mechanical Properties of Alloy Al7049-T6 and Lowering of its After-Machining Warpage


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Abstract

Aluminum alloy Al 7049 is studied in state T6. Heat treatment of the specimens is performed in different quenching media (cold water, boiling water, aqueous polymer solutions). The mechanical properties and the Brinell hardness of the alloy are determined after different modes of heat treatment. Comparative analysis is used to find the maximum residual stresses responsible for warpage of the alloy after machining. The relation between the warpage and the dimensionless Biot number is obtained. Quenching modes removing the warpage in billets of Al7049 are determined.

About the authors

Saeed Aliakbari Sani

School of Metallurgy and Materials Engineering, University of Science and Technology

Email: petroprom2013@yandex.ru
Iran, Islamic Republic of, Tehran

Javad Feizabadi

Department of Metallurgical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad

Email: petroprom2013@yandex.ru
Iran, Islamic Republic of, Mashhad

Mohammad Pourgharibshahi

School of Metallurgy and Materials Engineering, University of Science and Technology

Email: petroprom2013@yandex.ru
Iran, Islamic Republic of, Tehran

Seyed Hamidreza Hashemi

Department of Materials Science and Engineering, University of Science and Technology

Email: petroprom2013@yandex.ru
Iran, Islamic Republic of, Tehran

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