研究了Al-Cu-Mg-Ag合金在165℃时效组织与性能的变化,并分别采用欠时效和峰值时效的试样进行200℃及外加应力为200MPa高温持久实验.结果表明,欠时效态的试样在高温持久下,随时间延长,其剩余强度先上升后下降,强度峰值出现在持久20h.延伸率变化与强度变化基本相似.持久100h后,合金力学性能相对欠时效态无明显下降,显示出优良的热稳定性.合金欠时效的高温持久后的性能优于峰时效态.
参考文献
| [1] | POLMEAR I J;COUPER M J .Design development of an experimental wrought aluminum alloy for use at elevated temperatures[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19A(04):1027-1034. |
| [2] | R. N. Lumley;I. J. Polmear .The effect of long term creep exposure on the microstructure and properties of an underaged Al–Cu–Mg–Ag alloy[J].Scripta materialia,2004(9):1227-1231. |
| [3] | R. N. Lumley;A. J. Morton;I. J. Polmear .Enhanced creep performance in an Al-Cu-Mg-Ag alloy through underageing[J].Acta materialia,2002(14):3597-3608. |
| [4] | VIETZ J T;POLMEAR I J .The influence of small additions of silver on the ageing of aluminium alloys:observations on Al-Cu-Mg alloys[J].Institute of Metals,1966,94:410-419. |
| [5] | S. P. RINGER;K. HONO;I. J. POLMEAR .NUCLEATION OF PRECIPITATES IN AGED Al-Cu-Mg-(Ag) ALLOYS WITH HIGH Cu:Mg RATIOS[J].Acta materialia,1996(5):1883-1898. |
| [6] | A. K. Mukhopadhyay .Nucleation of Ω Phase in an Al-Cu-Mg Alloy Containing Small Additions of Ag[J].Materials transactions,1997(5):478-482. |
| [7] | 肖代红,王健农,丁冬雁.预拉伸处理对Al-5.3Cu-0.8Mg-0.3Ag合金性能和时效过程影响[J].热加工工艺,2003(04):1-2,5. |
| [8] | REICH L;MURAYAMA M;HONO K .Evolution of Ω phase in an Al-Cu-Mg-Ag alloy-a three-dimensional atom probe study[J].ACTA MATERIALIA,1999,46(17):6053-6062. |
| [9] | CHANG Y C;HOWE J M .Composition and Stability of Ω Phase in an Al-Cu-Mg-Ag alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1993,24A:1461-1470. |
| [10] | NAGAIl Y;MURAYAMA M;TANG Z et al.Role of vacancy-solute complex in the initial rapid age hardening in an Al-Cu-Mg alloy[J].Acta Materialia,2001,49:913-920. |
| [11] | KERRY S;SCOTT V D .Structure and orientation relation of precipitates formed in Al-Cu-Mg-Ag alloys[J].Metals Science,1984,18:289-294. |
| [12] | 陈大钦,郑子樵,李世晨,陈志国.Mechanism of stress aging in Al-Cu(-Mg-Ag) alloys[J].中国有色金属学会会刊(英文版),2004(04):779-784. |
| [13] | Chang CH;Lee SL;Lin JC;Yeh MS;Jeng RR .Effect of Ag content and heat treatment on the stress corrosion cracking of Al-4.6Cu-0.3Mg alloy[J].Materials Chemistry and Physics,2005(2/3):454-462. |
| [14] | D. H. Xiao;J. N. Wang;D. Y. Ding .Effect of Cu content on the mechanical properties of an Al-Cu-Mg-Ag alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):77-81. |
| [15] | TELESHOV V V;KAPUTKIN E YA;GOLOVLEVA A P et al.Temperature ranges of phase transformations and mechanical properties of allys of the Al-Cu-Mg-Ag system with various Cu/Mg ratios[J].Metal Science and Heat Treatment,2005,47(3-4):139-144. |
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