通过对不同状态单晶镍基合金进行组织形貌的观察和X-ray衍射分析,研究了组织演化对合金中γ'、γ两相晶格常数和错配度的影响.结果表明:铸态单晶合金不同区域中γ'相的形貌和尺寸有较大的差别,致使γ、γ'两相的晶格常数及错配度较大;将合金高温固溶处理和空冷后,均匀且细小的立方γ'相自γ基体中析出,使合金中γ'、γ两相的晶格常数及错配度减小;经完全热处理后,立方γ'相均匀长大,并保持共格界面,使γ'、γ两相的晶格常数及错配度略有增加.合金经有或无应力时效后,γ'相发生定向粗化,并在两相之间出现界面位错,使合金中γ'、γ两相的晶格常数及错配度增加.其中,由于外加应力的作用,致使塑性较好的γ相晶格常数增加的幅度大于γ'相.
参考文献
| [1] | U.Glatzel,Feller-Kniepmeier,Calculation of internal stresses in the γ/γ' microstructure of a nickel-base superalloy with high volume fraction of γ'-phase.Scripta Metall.,23,1839(1989) |
| [2] | R.Gilles,D.Ukherji,D.Tobbens,S.Roth,Neutron,X-ray diffraction measurements for the determination of γ'/γlattice misfit in Ni-base superalloys.Applied Physics,A7,1446(2002) |
| [3] | F.Diologent,T.d'Almeida,A.Jacques,P.Bastie,The γ'/γmismatch in nickel-based superalloys:In situ measurements during creep test.Nuclear Instruments and Methods in Physics Research,B200,346(2003) |
| [4] | D.Mukherji,R.Gilles,B.Barbier,D.Mukherji,R.Gilles,B.Barbier,Lattice misfit measurement in Inconel 706 containing coherent γ' and γ'' precipitates.Scripta Materials.,48,333(2003) |
| [5] | HU Zhuangqi,PENG Ping,LIU Yi,JIN Tao,SUN Xiaofeng,Design of γ' phase interface strengthening of nickel-base superalloys,Acta Metallurgica Sinica.,38,1121(2002)(胡壮麒,彭平,刘轶,金涛,孙晓峰,镍基合金中γ'相界面的强化设计.金属学报,38,1121(2002) |
| [6] | R.A.Ricks,A.J.Porter,R.C.Ecob,The growth of γ' precipitates in nickel-base superalloys,Acta Metal.,31,43(1983) |
| [7] | ZHANG Jinghua,YAO Xiangdong,ZHANG Zhiya,LI Yingao,GUAN Hengrong,HU Zhuangqi,Pseudodendrite growth characteristics of the γ' precipitates in a single crystal nickel-base superalloy,Chinese Journal of Materal Research,8,406(1994)(张静华,姚向东,张志亚,李英敖,管恒荣,胡壮麒,镍基单晶高温合金中的类树枝晶γ'相晶体生长,材料研究学报,8,406(1994) |
| [8] | S.Socrate,D.M.Parks,Evaluation of the Stability of raft structure in nickel base superalloys throughout their life-time,Acta Metall.Mater.,41,2185(1993) |
| [9] | U.Brucker,A.Epishin,G.Nolze,Determination of the Sign of the γ'/γ mismatch in Nickel-Based Superalloys by use of spectral impure Cu(Cr) radiation.Scripta Materials,36,1279(1996) |
| [10] | H.Akuhn,H.Biemann,T.Ungar,An X-ray study of creep-deformation induced changes of the lattice mismatch in the γ'-hardened monocrystalline nickel-base superalloy SRR 99.Acta Metal.Mater.,39,2783(1991) |
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