Effects of Solution Treatment on Mechanical Properties and Microstructure of Al-Cu-Mg Alloy with Ag Addition

LU Zhi-lun;PAN Qing-lin;CHEN Qin;CAO Su-fang;LIU Xiao-yan;HE Yun-bin

Journal of Aeronautical Materials ›› 2011, Vol. 31 ›› Issue (6) : 24-29.

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PDF(6374 KB)
Journal of Aeronautical Materials ›› 2011, Vol. 31 ›› Issue (6) : 24-29.

Effects of Solution Treatment on Mechanical Properties and Microstructure of Al-Cu-Mg Alloy with Ag Addition

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Abstract

Effect of solution treatment on mechanical properties and microstructure of Al-Cu-Mg alloy with Ag addition was studied by using optical microscopy(OM),scanning electron microscopy(SEM),transmission electron microscopy(TEM),differential scanning calorimeter (DSC),and tensile test. Results show that the most suitable solution treatment process of the alloy is solutionizing at 515℃ for 1.5 h. After aging treatment at 185℃ for 4 h,tensile strength and elongation of the alloy are 503 MPa and 12.3%, respectively. The mechanical properties of the alloy increase first with increasing solution temperature and time,then decrease with solution temperature over 515℃(holding time is 2h)or solution time(solution temperature is 515℃ ) longer than 1.5 h. The lower solution temperature and less solution time result in a less resolution of excess phases and produce a lower strength of the alloy. However,too high solution temperature and excessive solution time easily lead to overburn of the specimens. The overburned temperature of the alloy is demonstrated at 525.9℃. The solution temperature has stronger influence on mechanical properties and microstructure of this alloy than the solution time.

Key words

Al-Cu-Mg-Ag alloy / solution treatment / microstructure / mechanical propertie

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LU Zhi-lun, PAN Qing-lin, CHEN Qin, CAO Su-fang, LIU Xiao-yan, HE Yun-bin. Effects of Solution Treatment on Mechanical Properties and Microstructure of Al-Cu-Mg Alloy with Ag Addition[J]. Journal of Aeronautical Materials, 2011, 31(6): 24-29

References

KOVARIK L,COURT S A,FRASER H L,et al.GPB zones and composite GPB GPBII zones in Al-Cu-Mg alloys[J].Acts Materialia,2008,56(17):4804-4815.


GABLE B,ZHU A,SHIFLET G,et al.Assessment of the aluminum-rich corner of the A1-Cu-Mg-(Ag) phase diagram[J].Computer Coupling of Phase Diagrams and Thermochemistry,2008,32(2):256-267.

HERSENT E,DRIVER J,PIOT D.Modelling differential scanning calorimetry curves of precipitation in Al-Cu-Mg[J].Scripta Materialia,2010,62(7):455-457.
WANG S,STARINK S.Two types of S phase precipitates in Al-Cu-Mg alloys[J].Acta Materialia,2007,55(3):933-941.

BANERJEE S,ROBI P,SRINIVASAN A,et al.High temperature deformation behavior of Al-Cu-Mg alloys micro-alloyed with Sn[J].Materials Science and Engineering:(A),2010,527(10):2498-2503.


SOFYAN B T,RAVIPRASAD K,RINGER S P.Effects of microalloying with Cd and Ag on the precipitation process of Al-4Cu-0.3Mg(wt%) alloy at 200℃[J].Micron,2001,32(8):851-856.

XIAO Dai-hong,WANG Jian-nong,DING Dong-yan,et al.Effect of rare earth Ce addition on the microstructure and mechanical properties of an Al-Cu-Mg-Ag alloy[J].Journal of Alloys and Compounds,2003,352(1 ~2):84-88.
XIAO Dai-hong,HUANG Bai-yun.Effect of Yb addition on precipitation and microstructure of A1-Cu-Mg-Ag alloys[J].Transactions of Nonferrous Metals Society of China,2007,17(6):1181-1185.


BAKAVOS D,PRANGNELL P B,BES B,et al.The effect of silver on microstructural evolution in two 2xxx series Alalloys with a high Cu:Mg ratio during ageing to a T8 temper[J].M aterials Science and Engineering(A),2008,491(1~2):214-223.
SONG Min,CHEN Kang-hua,HUANG Lan-ping.Effects of Ag addition on mechanical properties and microstructures of Al-8Cu-0.5Mg alloy[J].Transactions of Nonferrous Metals Society of China,2006,16(4):766-771.


LUMLEY R N,POLMEAR I J.The effect of long term creep exposure on the microstructure and properties of an underaged Al-Cu-Mg-Ag alloy[J].Scripta Materialia,2004,50(9):1227-1231.

XIAO Dai-hong,WANG Jian-nong,CHEN Kang-hua,et al.Superplastic deformation of a heat-resistant Al-Cu-MgAg-Mn alloy[J].Journal of Materials Processing Technology,2009,209(7):3300-3305.

蹇海根,姜锋,官迪凯,等.固溶处理对7B04铝合金组织和性能的影响[J].材料热处理学报,2007,28(3):72-76.

潘晓林,孙文儒,杨树林.均匀化过程中铸态GH742合金的组织转变[J].材料研究学报,2008,22(6).651-656.
龚澎,张坤,戴圣龙.一种新型Al-Zn-Mg-Cu系铝合金的均匀化工艺研究[J].航空材料学报,2009,29(5):33-38.

李正栋,张国庆,赵宇新.IN783合金均匀化处理工艺研究[J].航空材料学报,2006,26(3):295-296.

戴晓元,夏长清,刘昌斌,等.固溶处理及时效对7xxx铝合金组织与性能的影响[J].材料热处理学报,2007,28(4):59-63.
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