Enhanced formability and accelerated precipitation behavior of 7075 Al alloy extruded rod by high temperature aging

Ming Hsiang Ku; Fei Yi Hung; Truan Sheng Lui; Jiun Chih Lai

doi:10.3390/met8080648

Enhanced formability and accelerated precipitation behavior of 7075 Al alloy extruded rod by high temperature aging

Ming Hsiang Ku, Fei Yi Hung, Truan Sheng Lui, Jiun Chih Lai

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

This study was conducted for high temperature aging (HTA) to simultaneously reduce current treatment time and increase the tensile ductility of 7075 aluminum alloy. Various high temperatures and different durations for artificial aging were compared. We investigated the microstructure and the tensile properties of 7075 aluminum alloy extruded rod after various HTAs, and compared them with the outcomes of full annealing (O). The total elongation (TE) of the specimen after solution heat treatment (490 °C, 1 h) and artificial aging (280 °C, 12 h) was about 25%. For full annealing, it is known as 21%. The reason for this was the formation of the η phase in the matrix, which had fewer large particles (Al-Cu phase). The hardening of HTA specimens is higher than that of O, indicating necking resistance during homogeneous plastic deformation. Thereby, HTA treatment increases the formability of 7075 aluminum alloy.

Original language	English
Article number	648
Journal	Metals
Volume	8
Issue number	8
DOIs	https://doi.org/10.3390/met8080648
Publication status	Published - 2018 Aug 17

All Science Journal Classification (ASJC) codes

Materials Science(all)

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title = "Enhanced formability and accelerated precipitation behavior of 7075 Al alloy extruded rod by high temperature aging",

abstract = "This study was conducted for high temperature aging (HTA) to simultaneously reduce current treatment time and increase the tensile ductility of 7075 aluminum alloy. Various high temperatures and different durations for artificial aging were compared. We investigated the microstructure and the tensile properties of 7075 aluminum alloy extruded rod after various HTAs, and compared them with the outcomes of full annealing (O). The total elongation (TE) of the specimen after solution heat treatment (490 °C, 1 h) and artificial aging (280 °C, 12 h) was about 25%. For full annealing, it is known as 21%. The reason for this was the formation of the η phase in the matrix, which had fewer large particles (Al-Cu phase). The hardening of HTA specimens is higher than that of O, indicating necking resistance during homogeneous plastic deformation. Thereby, HTA treatment increases the formability of 7075 aluminum alloy.",

author = "Ku, {Ming Hsiang} and Hung, {Fei Yi} and Lui, {Truan Sheng} and Lai, {Jiun Chih}",

note = "Funding Information: Author Contributions: M.-H.K. analyzed the data, and wrote the paper. F.-Y.H. and T.-S.L. are advisers. J.-C.L. Author Contributions: M.-H.K. analyzed the data, and wrote the paper. F.-Y.H. and T.-S.L. are advisers. J.-C.L. performed the experiments, and analyzed the data. Funding: The authors are grateful to The Instrument Center of National Cheng Kung University and the Funding: The authors are grateful to The Instrument Center of National Cheng Kung University and the Ministry Ministry of Science and Technology of Taiwan (Grant No. MOST 106-2221-E-006-064) for their financial support for this research. Publisher Copyright: {\textcopyright} 2018 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2018",

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doi = "10.3390/met8080648",

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AU - Ku, Ming Hsiang

AU - Hung, Fei Yi

AU - Lui, Truan Sheng

AU - Lai, Jiun Chih

N1 - Funding Information: Author Contributions: M.-H.K. analyzed the data, and wrote the paper. F.-Y.H. and T.-S.L. are advisers. J.-C.L. Author Contributions: M.-H.K. analyzed the data, and wrote the paper. F.-Y.H. and T.-S.L. are advisers. J.-C.L. performed the experiments, and analyzed the data. Funding: The authors are grateful to The Instrument Center of National Cheng Kung University and the Funding: The authors are grateful to The Instrument Center of National Cheng Kung University and the Ministry Ministry of Science and Technology of Taiwan (Grant No. MOST 106-2221-E-006-064) for their financial support for this research. Publisher Copyright: © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2018/8/17

Y1 - 2018/8/17

N2 - This study was conducted for high temperature aging (HTA) to simultaneously reduce current treatment time and increase the tensile ductility of 7075 aluminum alloy. Various high temperatures and different durations for artificial aging were compared. We investigated the microstructure and the tensile properties of 7075 aluminum alloy extruded rod after various HTAs, and compared them with the outcomes of full annealing (O). The total elongation (TE) of the specimen after solution heat treatment (490 °C, 1 h) and artificial aging (280 °C, 12 h) was about 25%. For full annealing, it is known as 21%. The reason for this was the formation of the η phase in the matrix, which had fewer large particles (Al-Cu phase). The hardening of HTA specimens is higher than that of O, indicating necking resistance during homogeneous plastic deformation. Thereby, HTA treatment increases the formability of 7075 aluminum alloy.

AB - This study was conducted for high temperature aging (HTA) to simultaneously reduce current treatment time and increase the tensile ductility of 7075 aluminum alloy. Various high temperatures and different durations for artificial aging were compared. We investigated the microstructure and the tensile properties of 7075 aluminum alloy extruded rod after various HTAs, and compared them with the outcomes of full annealing (O). The total elongation (TE) of the specimen after solution heat treatment (490 °C, 1 h) and artificial aging (280 °C, 12 h) was about 25%. For full annealing, it is known as 21%. The reason for this was the formation of the η phase in the matrix, which had fewer large particles (Al-Cu phase). The hardening of HTA specimens is higher than that of O, indicating necking resistance during homogeneous plastic deformation. Thereby, HTA treatment increases the formability of 7075 aluminum alloy.

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Enhanced formability and accelerated precipitation behavior of 7075 Al alloy extruded rod by high temperature aging

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