铸态K480和DD407高温合金在长期时效过程中γ'相的稳定性

机械工程材料, 2015, 39(6): 67-72. doi: 10.11973/jxgccl201506014

铸态K480和DD407高温合金在长期时效过程中γ'相的稳定性

姚志浩 ^1, , 董建新 ^2, , 张麦仓 ^3, , 陈昊 ^4, , 于秋颖 ^5,

1.北京科技大学材料科学与工程学院,北京,100083

2.北京科技大学材料科学与工程学院,北京,100083

3.北京科技大学材料科学与工程学院,北京,100083

4.北京科技大学材料科学与工程学院,北京,100083

5.北京航空材料研究院,北京,100095

基金项目: 北京市自然科学基金资助项目(2154051) 中央高校基本业务基金资助项目(FRF-TP-14-002A2,FRF-IC-14-003) 教育部新教师基金资助项目(20130006120005) 国家自然科学基金(青年)资助项目(51401020)

关键词：高温合金 , 单晶合金 , γ'相 , 稳定性 , 长期时效

Stability of γ' Phase in Cast Superalloy K480 and DD407 During Long Term Ageing

Keywords： superalloy , single crystal superalloy , γ' phase , stability , long term ageing

研究了两种典型铸态K480及DD407高温合金在870℃下经3 000 h时效过程中γ'相的稳定性,探讨γ'相的粗化机制.结果表明:K480合金和DD407合金经过长期时效后组织中均无TCP相析出,γ'相发生轻微粗化现象,合金组织稳定性良好,其中DD407合金中γ'相长大趋势大-于-K480合金的;随着时效时间的延长,K480合金中晶界逐渐变宽,碳化物沿晶界长大,最终连结成链状,并有成膜趋势;K480合金中γ'相长大符合二次方定律,而DD407合金的符合三次方定律;该两种合金γ'相长大方式分别为界面控制和扩散控制.

参考文献

[1]	胡壮麒,刘丽荣,金涛,孙晓峰.镍基单晶高温合金的发展[J].航空发动机,2005(03):1-7.
[2]	谢锡善.我国高温材料的应用与发展[J].机械工程材料,2004(01):2-8,11.
[3]	NATHAL M V;MACKAY R A;MINER R V .Influence of precipitate morphology on intermediate temperature creep properties of a nickel-base superalloy single crystal[J].Metallurgical and Materials Transaction:A,1989,20(1):133-141.
[4]	于秋颖,张麦仓,董建新,姚志浩.难变形镍基高温合金GH710的高温变形特性[J].机械工程材料,2012(12):62-66,72.
[5]	姚志浩,董建新,陈旭,张麦仓,郑磊.GH738高温合金长期时效过程中γ'相演变规律[J].材料热处理学报,2013(01):31-37.
[6]	MUKHERJI D;ROSLER J.Effect of the γ' volume fraction on the creep strength of Ni-base superalloys[J].ZEITSCHRIFT FUR METALLKUNDE,1994(5):478-484.
[7]	FOOTNER P K;RIHARDS B P .Long term growth of superalloy γ' particles[J].Journal of Materials Science,1982,17:2141-2153.
[8]	Ges A.;Palacio F.;Fornaro O. .LONG TERM COARSENING OF GAMMA' PRECIPITATES IN A NI-BASE SUPERALLOY[J].Journal of Materials Science,1997(14):3687-3691.
[9]	ERCAN BALIKCI .Influence of Various Heat Treatments on the Microstructure of Polycrystalline IN738LC[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1997(10):1993-2003.
[10]	E. BALIKCI;A. RAMAN .Characteristics of the γ′ precipitates at high temperatures in Ni-base polycrystalline superalloy IN738LC[J].Journal of Materials Science,2000(14):3593-3597.
[11]	Baldan A. .Review Progress in Ostwald ripening theories and their applications to the gamma '-precipitates in nickel-base superalloys - Part II - Nickel-base superalloys [Review][J].Journal of Materials Science,2002(12):2379-2405.
[12]	MACKAY R A;EBERT L J .The development of γ-γ' lamellar structures in a nickel-base superalloy during elevated temperature mechanical testing[J].Metallurgical and Materials Transaction:A,1985,16(11):1969-1982.
[13]	MALOW T;ZHU Jia-wei;WAHI R P .Influence of heat treatment on the microstructure of the single-crystal nickel-base superalloy SC16[J].Journal of Metallurgical Engineering,1994,85(1):9-19.
[14]	SOUCAIL M;BIENVENU Y .Dissolution of the γ' in a nickel base superalloy at equilibrium and under rapid heating[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,1996,220:215-222.
[15]	ZHIHAO YAO;MAICANG ZHANG;JIANXIN DONG .Stress Rupture Fracture Model and Microstructure Evolution for Waspaloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2013(7):3084-3098.

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