研究Ti-47.5Al-2Cr-2Nb-0.2B全片层组织室温变形结构中γ/γ片层间变形协调行为.引入多晶体塑性变形的几何协调因子m,并利用矩阵分析方法计算120-旋转有序型、真孪晶型和伪孪晶型γ/γ界面两侧片层中各种滑移系之间的m值,与实验结果比较发现,通过计算m值可以预测不同类型γ/γ界面两侧片层中的有效滑移系,120-旋转有序型γ/γ界面几何协调性最好,1/6<112-]{111}形变孪晶可以通过1/2<110-]{111}普通位错协调变形;对于真孪晶型界面,1/6<112-]{111}形变孪晶可以扩展通过,并仍以1/6<112-]{111}孪晶变形进行协调.
参考文献
| [1] | MARUYAMA K;KIM HEE Y;LUZZI D E.Optimization of microstructural variables for creep resistance and yield strength in fully-lamellar TiAl alloys[A].Wyoming:TMS,2001:52-61. |
| [2] | KIM Y W.Role of niobium in the progress of gamma alloy development[A].Araxa,MG,Brazil:TMS,2004:125-138. |
| [3] | KIM Y W;DIMIDUK D M.Designing gamma TiAl alloys:fundamental,strategy and production[A].Warrendale,PA:TMS,1997:531-543. |
| [4] | Z.X. LI;C.C. CAO .Effects of minor boron addition on phase transformation and properties of Ti-47.5Al-2Cr-2Nb alloy[J].Intermetallics,2005(3/4):251-256. |
| [5] | 李臻熙,曹春晓.Effects of γ/γ interfacial structures on continuous coarsening of lamellar microstructure in TiAl alloy during aging[J].中国有色金属学会会刊(英文版),2004(01):37-43. |
| [6] | INUI H;MH O;NAKAMURA A;YAMAGUCHI M .Ordered domains in TiAl coexisting with Ti3Al in the lamellar structure of Ti-rich TiAl compounds[J].Philosophical Magazine,1992,66(04):539-555. |
| [7] | INUI H;NAKAMURA A;OH M H;YAMAGUCHI M .Deformation structures in Ti-rich TiAl polysynthetically twinned crystals[J].Philosophical Magazine A:Physics of Condensed Matter:Structure Defects and Mechanical Properties,1992,66(04):557-573. |
| [8] | MIURA S;HAMASHIMA K;AUST K T .Plastic deformation of aluminium bicrystals having and coincidence tilt boundaries[J].Acta Metallurgica,1980,28(11):1591-1602. |
| [9] | REY C;ZAOUI A .Grain boundary effects in deformed bicrystals[J].Acta Metallurgica,1982,30(02):523-532. |
| [10] | KAWAZOE H;TAKASUGI T;IZUMA O .Cyclic deformation of α-β brass two-phase bicrystals-Ⅰ.Slip behavior.Grain boundary effects in deformed bicrystals[J].Acta Metallurgica,1989,37(11):2883-2894. |
| [11] | SHEN Z;WAGONER R H;CLARK W A .Dislocation and grain boundary interactions in metals[J].Acta Metallurgica,1988,38(12):3231-3242. |
| [12] | APPLE F;WAGNER R .Microstructure and deformation of two-phase γ-titanium aluminides[J].Materials Science and Engineering R:Reports,1998,R22:187-268. |
| [13] | GREENBERG B A .Dislocation transformations and the anomalies of deformation characteristics in TiAl-Ⅱ:The structure of dislocation ensemble:Experiment and theory[J].Acta Metallurgica Et Materialia,1991,39(02):243-254. |
| [14] | MORRIS M A .Dislocation configurations in two phase TiAl alloys Ⅱ:Structures after compression[J].Philosophical Magazine A:Physics of Condensed Matter:Structure Defects and Mechanical Properties,1993,68(02):257-278. |
| [15] | LASTER J;MORRIS M A .Compatibility of deformation in two-phase Ti-Al alloys:Dependence on microstructure and orientation relationships[J].Metallurgical and Materials Transactions A:Physical Metallurgy & Materials Science,1995,26A(07):1745-1756. |
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