TY - JOUR
T1 - Strengthening of AA7075 alloy by processing with high-pressure sliding (HPS) and subsequent aging
AU - Lee, Seungwon
AU - Tazoe, Kiyonari
AU - Mohamed, Intan Fadhlina
AU - Horita, Zenji
N1 - Funding Information:
One of the authors (IFM) gratefully acknowledges SIRIM Berhad, Malaysia for a scholarship. This work was supported in part by Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials”, in part by the Light Metals Educational Foundation of Japan and in part by a Grant-in-Aid for Scientific Research from the MEXT, Japan , in Innovative Areas “Bulk Nanostructured Metals” 22102004 and in part by a Grant-in-Aid for Scientific Research (S) from the MEXT, Japan (No. 26220909 ).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/3/5
Y1 - 2015/3/5
N2 - High-pressure sliding (HPS) is a new severe plastic deformation process for sheet samples under high-pressure. In this study, the HPS process is applied to an age-hardenable 7075 aluminum alloy for grain refinement. HPS was conducted under a pressure of 1.0. GPa for sliding distances of 7.0. mm at room temperature and for 10. mm at 373. K and 423. K, and thus the average grain size was reduced to ~280. nm, ~240. nm and ~250. nm. Ultimate tensile strength of ~600. MPa was achieved by this grain refinement. Aging at 373. K led to further hardening to 745. MPa of ultimate tensile strength with 4% of elongation to fracture through a fine dispersion of precipitates. It is shown that simultaneous strengthening due to grain refinement and fine precipitation is achieved in the AA7075 by application of HPS and subsequent aging.
AB - High-pressure sliding (HPS) is a new severe plastic deformation process for sheet samples under high-pressure. In this study, the HPS process is applied to an age-hardenable 7075 aluminum alloy for grain refinement. HPS was conducted under a pressure of 1.0. GPa for sliding distances of 7.0. mm at room temperature and for 10. mm at 373. K and 423. K, and thus the average grain size was reduced to ~280. nm, ~240. nm and ~250. nm. Ultimate tensile strength of ~600. MPa was achieved by this grain refinement. Aging at 373. K led to further hardening to 745. MPa of ultimate tensile strength with 4% of elongation to fracture through a fine dispersion of precipitates. It is shown that simultaneous strengthening due to grain refinement and fine precipitation is achieved in the AA7075 by application of HPS and subsequent aging.
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U2 - 10.1016/j.msea.2015.01.026
DO - 10.1016/j.msea.2015.01.026
M3 - Article
AN - SCOPUS:84922182837
SN - 0921-5093
VL - 628
SP - 56
EP - 61
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -