采用喷射沉积技术制备Al-12Zn-2.4Mg-1.1Cu-0.2Zr-0.3Ni铝合金,利用电子拉伸机和透射电镜等手段,研究不同挤压比、不同固溶温度下合金经120、130℃时效处理后力学性能与微观组织之间的关系.结果表明:合金经480℃×2h+120 ℃×24 h固溶与时效处理后,合金抗拉强度达到830 MPa,延伸率保持在7.5%;加入微量锆和镍后PFZ区变宽,并且晶界上黑色链状物相(GBP)中有微量Ni元素存在,有球形Al3Zr相出现在PFZ区周围;纳米级含Zr、Ni相的"钉扎"细晶作用、η'相和PFZ联合作用促使材料具有良好的综合力学性能.
参考文献
| [1] | Fridlyander I N .Russian aluminum alloys for aerospace and transport applications[J].Materials Science Forum,2000,331-337:921-925. |
| [2] | Flynn R J;Robinson J S .The application of advances in quench factor analysis property prediction to the heat treatment of 7010 aluminum alloy[J].Journal of Materials Processing Technology,2004,153-154:674-680. |
| [3] | Hirsch J;Karhansen K F;Lochte L .Advances in industrial aluminum research and development[J].Materials Science Forum,2002,396-402:1721-1730. |
| [4] | 张永安,王锋,朱宝宏,刘红伟,熊柏青,石力开.喷射成形Al10.8Zn2.8Mg1.8Cu合金沉淀析出强化行为[J].中国有色金属学报,2006(11):1845-1849. |
| [5] | De Sanctis M .Structure and properties of rapidly solidified ultrahigh strength Al-Zn-Mg-Cu alloys produced by spray deposition[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1991,141(01):103-121. |
| [6] | Schaffer G B;Huo S H;Drennan J et al.The effect of trace elements on the sinteruing of an Al-Zn-Mg-Cu alloy[J].Acta Materialia,2001,49:2671-2678. |
| [7] | Domalavage P K;Grant N J .Structure and properties of rapidly solidified 7075 P/M aluminium alloy modified with nickel and zirconium[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1983,14A(08):1599-1606. |
| [8] | Y.L.Wu;F.H.Froes .Microalloying of Sc,Ni, and Ce in an advanced Al-Zn-Mg-Cu alloy[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,1999(4):1017-1024. |
| [9] | Suryanarayana C;Froes F H .Development of light alloys by rapid solidification procession[J].International Journal of Powder Metallurgy,1990,26(02):117-129. |
| [10] | M. J. Starink;S. C. Wang .A model for the yield strength of overaged Al-Zn-Mg-Cu alloys[J].Acta materialia,2003(17):5131-5150. |
| [11] | LI Zhenliang;XIE Jianxin;CHEN Wei et al.Microstructure and property of nickel-modified ultrahigh strength Al-Zn-Mg-Cu alloy by spray forming[J].Materials Science Forum,2007,546-549:871-876. |
| [12] | B. C. Wei;C. Q. Chen;Z. Huang;Y. G. Zhang .Aging behavior of Li containing Al-Zn-Mg-Cu alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):161-167. |
| [13] | Chinh N Q;Kovacs Zs;Reich L et al.Precipitation and work harding in high strength AlZnMg(Cu,Zr) alloys[J].Materials Science Forum,1996,217-222:1293-1298. |
| [14] | Sha G;Cerezo A .Early-stage precipitation in Al-Zn-Mg alloy (7050)[J].Acta Materialia,2004,52:4503-4516. |
| [15] | Dumont D.;Deschamps A.;Brechet Y. .On the relationship between microstructure, strength and toughness in AA7050 aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):326-336. |
| [16] | 宋仁国.高强度铝合金的研究现状及发展趋势[J].材料导报,2000(01):20-21,34. |
| [17] | Tomo Ogura;Shoichi Hirosawa;Tatsuo Sato .Quantitative characterization of precipitate free zones in Al-Zn-Mg(-Ag) alloys by microchemical analysis and nanoindentation measurement[J].Science and technology of advanced materials,2004(4):491-496. |
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