| 金属多晶体塑性变形几何分析及双相TiAl基合金的室温塑性 |
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| 引用本文： | 梁伟,杨德庄.金属多晶体塑性变形几何分析及双相TiAl基合金的室温塑性[J].金属学报,1998,34(6):597-602. |
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| 作者姓名： | 梁伟 杨德庄 |
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| 作者单位： | [1]太原工业大学测试中心 [2]哈尔滨工业大学金属材料及热处理教研室 |
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| 基金项目： | 山西省自然科学基金!971039 |
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| 摘 要： | 通过对金属多晶体塑性变形几何分析表明，塑性应变量一定时，扫过单位体积晶体的位错线长度与晶粒尺寸成反比，从理论上证明了单位面积晶界所发射的位错线长度与晶粒尺寸无关，而晶粒间协调变形时晶界凸起或凹陷的畸变量与晶粒尺寸成正比。
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| 关 键 词： | 多晶体 塑性变形 TiAl基合金 伸长率 几何分析 |
| 收稿时间： | 1998-06-18 |
| 修稿时间： | 1998-06-18 |
GEOMETRICAL ANALYSIS ON PLASTIC DEFORMATION OF POLYCRYSTALLINE METALS AND THE ROOM TEMPERATURE PLASTICITY OF TOW-PHASE TiAl-BASE ALLOYS |
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| LIANG Wei,YANG DezhuangComspondent: LIANG Wei,prodessor Tel: Fax:.GEOMETRICAL ANALYSIS ON PLASTIC DEFORMATION OF POLYCRYSTALLINE METALS AND THE ROOM TEMPERATURE PLASTICITY OF TOW-PHASE TiAl-BASE ALLOYS[J].Acta Metallurgica Sinica,1998,34(6):597-602. |
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| Authors: | LIANG Wei YANG DezhuangComspondent: LIANG Wei prodessor Tel: Fax: |
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| Affiliation: | LIANG Wei,YANG Dezhuang( Centre of Testing and Measuring,Taiyuan University of Technologyl Taiyuan )( Harbin Institute of Technology,Harbin )Comspondent: LIANG Wei,prodessor Tel: () Fax: () |
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| Abstract: | Geometrical analysis on plastic deformation charateristics of polycrystallineaggregates proved that the total length of dislocation lines that cat through a unit volume is ininverse proportion to the grain size under given deformation strains, while the total length ofdislocstion lines emitted per unit area of grain boundary is independent of grain size. Furthermore, the distortion of grain boundaries was proved to be propotion to the grain size. On thisbasis and combined with the analysis on the deformation mechanisms, the relationships betweenroom temperature elongation and grain size of two--phase Toil--base alloys were established asfollows: |
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| Keywords: | polycrystalline plastic deformation deformation compatibility grain size dislocation density Ti Al base alloy tensile elongation |
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