TY - JOUR
T1 - A new infrared heat treatment on hot forging 7075 aluminum alloy
T2 - Microstructure and mechanical properties
AU - Chang, Yi Ling
AU - Hung, Fei Yi
AU - Lui, Truan Sheng
N1 - Funding Information:
This research received no external funding. The authors are grateful to the Instrument Center of National Cheng Kung University and the Ministry of Science and Technology, Taiwan (107-2221-E-006-012-MY2), for their financial support.
Funding Information:
Acknowledgments: The authors are grateful to the Instrument Center of National Cheng Kung University and the Ministry of Science and Technology, Taiwan (107-2221-E-006-012-MY2), for their financial support.
Publisher Copyright:
© 2020 by the authors.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - When hot forging 7075 aluminum alloy, as a military material durable enough for most of its applications, it needs to be heat-treated to ensure the target material property achieves the application requirements. However, the material properties change because of heat throughout usage. In this study, a new approach was devised to heat treat the alloy to prevent material property changes. The study further clarified the effect of rapid heat treatment on the high-temperature resistance of a hot forging 7075 aluminum alloy. Infrared (IR) heat treatment was used as a rapid heating technique to effectively replace the conventional resistance heat (RH) treatment method. Our experimental result showed that IR heat treatment resulted in better age hardening at the initial aging stage, where its tensile strength and elongation appeared like that of a resistance heat treatment. More so, based on hardness and tensile test results, the IR-heated treatment process inhibited the phase transformation of precipitations at a higher temperature, improving high-temperature softening resistance and enhancing the thermal stability of the hot forging 7075 aluminum alloy.
AB - When hot forging 7075 aluminum alloy, as a military material durable enough for most of its applications, it needs to be heat-treated to ensure the target material property achieves the application requirements. However, the material properties change because of heat throughout usage. In this study, a new approach was devised to heat treat the alloy to prevent material property changes. The study further clarified the effect of rapid heat treatment on the high-temperature resistance of a hot forging 7075 aluminum alloy. Infrared (IR) heat treatment was used as a rapid heating technique to effectively replace the conventional resistance heat (RH) treatment method. Our experimental result showed that IR heat treatment resulted in better age hardening at the initial aging stage, where its tensile strength and elongation appeared like that of a resistance heat treatment. More so, based on hardness and tensile test results, the IR-heated treatment process inhibited the phase transformation of precipitations at a higher temperature, improving high-temperature softening resistance and enhancing the thermal stability of the hot forging 7075 aluminum alloy.
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U2 - 10.3390/ma13051177
DO - 10.3390/ma13051177
M3 - Article
AN - SCOPUS:85081533985
SN - 1996-1944
VL - 13
JO - Materials
JF - Materials
IS - 5
M1 - 1177
ER -