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Metals 2019, 9(2), 182; https://doi.org/10.3390/met9020182

Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

1
State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
2
Key Laboratory of Automobile Materials, Ministry of Education and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130022, China
*
Authors to whom correspondence should be addressed.
Received: 3 January 2019 / Revised: 24 January 2019 / Accepted: 1 February 2019 / Published: 3 February 2019
(This article belongs to the Special Issue The Behaviours of Alloys under Thermo-Mechanical Treatment)
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Abstract

The present work investigates the microstructure and tensile properties of a hot rolled 6061 alloy quenched by cold rolls (RQ) at different preheating temperatures. The preheating temperature strongly affects microstructure evolution and mechanical properties. Low preheating temperature (490 °C) resulted in both low strength and low elongation. The RQ alloy preheated at 540 °C exhibited improved ductility compared to those subjected to T6 and T8 temper, and comparable strength to that after T8 temper. The dynamic recovery during hot rolling contributed to the improved tensile elongation and retained work hardening. High preheating temperature also led to pronounced ageing hardening during short-term ageing. View Full-Text
Keywords: hot forming-quenching; microstructure; mechanical properties; recovery; aluminum alloys hot forming-quenching; microstructure; mechanical properties; recovery; aluminum alloys
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhao, Q.-L.; Shan, T.-T.; Geng, R.; Zhang, Y.-Y.; He, H.-Y.; Qiu, F.; Jiang, Q.-C. Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching. Metals 2019, 9, 182.

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