|
|
|
| Fabrication and mechanical properties of high performance 2024 aluminum alloy |
| CAO Hui-qin,GUO Zhi-meng,YE An-ping,LUO Ji |
| Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China |
|
|
|
|
Abstract High performance Al-Cu-Mg alloy was fabricated by high energy ball milling, nitrogen sintering and hot extrusion. The microstructure and mechanical properties of the material were investigated. Results show that the formation of liquid phase during sintering promotes the aluminum alloy densification. Relative density of 97.1% can be achieved after sintering. The 2024 aluminum alloy shows excellent mechanical properties after extrusion and T6 heat treatment. The ultimate tensile strength and yield strength are 612 MPa and 465 MPa, respectively, which is superior to those of conventional 2024 aluminum alloy.
|
|
Received: 08 October 2015
Published: 08 December 2015
|
|
|
|
| [1] Kim YW, Griffith WM, Froes FH. Surface oxides in P/M aluminum alloys[J]. The Journal of The Minerals, Metals & Materials Society, 1985, 37(8):27-33.[2] Marcus P, Hinnen C, Olefjord I. Determination of attenuation lengths of photoelectrons in aluminium and aluminium oxide by angle-dependent x-ray photoelectron spectroscopy[J]. Surface & Interface Analysis, 1993, 20(11): 923-929.[3] Mathieu HJ, Datta M, Landolt D. Thickness of natural oxide films determined by AES and XPS with/without sputtering[J]. Journal of Vacuum Science Technology, 1985, 3(2):331-335.[4] Nylund A, Olefjord I. Surface analysis of oxidized aluminium. 1. Hydration of Al2O3 and decomposition of Al(OH)3 in a vacuum as studied by ESCA[J]. Surface & Interface Analysis, 1994, 21(5):283-289.[5] Fuggle JC, Watson LM, Fabian DJ, Affrossman S. X-ray photoelectron studies of the reaction of clean metals (Mg, Al, Cr, Mn) with oxygen and water vapour[J]. Surface Science, 1975, 49(1):61-76.[6] Van Beek HJ, Mittemeijer EJ. Amorphous and crystalline oxides on aluminium[J]. Thin Solid Films, 1984, 122(2):131-151.[7] Benjamin JS, Bomford MJ. Dispersion strengthened aluminum made by mechanical alloying[J]. Metallurgical Transactions A, 1977, 8(8):1301-1305.[8] Benjamin JS, Schelleng RD. Dispersion strengthened aluminum-4 pct magnesium alloy made by mechanical alloying[J]. Metallurgical Transactions A, 1981, 12(10):1827-1832.[9] G?k?e A, F?nd?k F, Kurt AO. Microstructural examination and properties of premixed Al–Cu–Mg powder metallurgy alloy[J]. Materials Characterization, 2011, 62(7):730-735.[10] MacAskill IA, Jr Hexemer RL, Donaldson IW, Bishop DP. Effects of magnesium, tin and nitrogen on the sintering response of aluminum powder[J]. Journal of Materials Processing Technology, 2010, 210(15):2252-2260.[11] Martin JM, Castro F. Liquid phase sintering of P/M aluminium alloys: effect of processing conditions[J]. Journal of Materials Processing Technology, 2003, 143–144:814-821.[12] Sercombe TB, Schaffer GB. On the role of magnesium and nitrogen in the infiltration of aluminium by aluminium for rapid prototyping applications[J]. Acta Materialia, 2004, 52(10):3019-3025.[13] Boland CD, Hexemer Jr RL, Donaldson IW, Bishop DP. Industrial processing of a novel Al–Cu–Mg powder metallurgy alloy[J]. Materials Science & Engineering A, 2013, 559(1):902-908.[14] Dunnett KS, Mueller RM, Bishop DP. Development of Al–Ni–Mg–(Cu) aluminum P/M alloys[J]. Journal of Materials Processing Technology, 2008, 198(1-3):31-40. |
|
|
|
2015, Vol. 25 
