利用微观相场方法对3种不同成分的Al-Zr合金的时效过程进行计算机模拟.结果显示:Al-3at%Zr、Al-6at%Zr和Al-15at%Zr3种合金时效过程中形成的Ll<,2>结构的Al<,3>Zr有序相的沉淀机制分别为失稳分解机制、失稳分解加非经典形核混合机制、非经典形核机制:有序相形成经历的过程为过饱和固溶体→G.P.区→非化学计量比有序相一化学计量比有序相,开始阶段形成的G.P.区中,一些尺寸和浓度较小的区域随着演化的进行逐渐溶解消失,一些尺寸和浓度较大的则进一步长大有序化并最终形成化学计量比有序相.
参考文献
| [1] | Neubert V;Smola B;Bakkar A et al.[J].Materials Science and Engineering,2007,A464:358. |
| [2] | Nayak S S;Pabi S K;Murty B S .[J].INTERMETALLICS,2007,15(01):26. |
| [3] | R.Poduri;L.-Q.Chen .Computer simulation of morphological evolution and coarsening kinetics of δ'(Al_3Li) precipitates in Al-Li alloys[J].Acta materialia,1998(11):3915-3928. |
| [4] | Wang JC;Osawa M;Yokokawa T;Harada H;Enomoto M .Modeling the microstructural evolution of Ni-base superalloys by phase field method combined with CALPHAD and CVM[J].Computational Materials Science,2007(4):871-879. |
| [5] | Khachaturyan A G.Theory of Structural Transformations in the Soids[M].New York:wiley,1983:139. |
| [6] | Chen Longqing;Khachaturyan A G .[J].Scripta Metallurgica et Materialia,1991,25(01):61. |
| [7] | Emmanuel Clouet et al.[J].Physical Review,2004,B69:064 109. |
| [8] | Poduri R;Chen L Q .[J].Acta Materialia,1997,45:245. |
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