The effects of applied tensile strain on the coherent α2→O-phase transformation in Ti-Al-Nb alloys are explored by computer simulation using a phase-field method. The focus is on the influence of the applied strain direction on the microstructure and volume fraction of the O-phase precipitates. It is found that altering applied strain direction can modify microstructure of Ti-25Al-10～12Nb (at. Pct) alloy during α2→O-phase transformation effectively and full laminate microstructure in the Ti-25Al-10Nb (at. Pct) alloy can be realized by an applied strain only along the direction 30° away from the α2 phase <1010> in magnitude equivalent to the stress-free transformation strain. The simulation also shows that not only the magnitude of applied strain but also the applied strain direction influences the O-phase volume fraction and the effect of strain direction on the volume fraction is up to 25%.
参考文献
| [1] | R Dierk.Computational Materials Science:The Simulation of Materials Microstructures and Properties[M].Weinheim New York,1998 |
| [2] | Y.Wang;L.Q.Chen.Methods in Materials Research[M].,2000:31-2a323. |
| [3] | D anerjee;A.K.Gogia;T.K.Nandy.Structural Intermetallics, eds RDarolia, JJLewandowski,CTLiu, PLMartin, DBMiracle and MVNathal Metallurgical Society of AIME[J].Warrendale USA,1993:19. |
| [4] | L.A.Bendersky;W.J.Boettinger .[J].Journal of Research of The National Bureau of Standards,1993,98:585. |
| [5] | R G Rowe .High Temperature Aluminides & Intermatallicseds SHWhang CTLiu DPPope and JOStiegler[Z].TMSAIME Warrendale USA,1990. |
| [6] | Y. H. WEN;Y. WANG;L. Q. CHEN .INFLUENCE OF AN APPLIED STRAIN FIELD ON MICROSTRUCTURAL EVOLUTION DURING THE α_2 → O- PHASE TRANSFORMATION IN Ti-A1-Nb SYSTEM[J].Acta materialia,2001(1):13-20. |
| [7] | K Muraleedharan;D Banerjee .Phil Mag A[J].Philosophical Magazine A:Physics of Condensed Matter:Structure,Defects and Mechanical Properties,1995,71:1011. |
| [8] | A G Khachaturyan.Theory of Structural Transformations in Solids[M].John Wiley & Sons Inc,New York,1983 |
| [9] | Y H Wen;Y Wang;L A Benderskey 等.[J].Acta Materialia,2000,48:4125. |
| [10] | L. Q. Chen;Jie Shen .Applications of semi-implicit Fourier-spectral method to phase field equations[J].Computer physics communications,1998(2/3):147-158. |
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