研究了弹性各向异性、超位错分解组态,变形温度及层片界面对L10结构TiAl合金中超位错分解宽度的影响作用.计算结果表明,同弹性各向同性相比,弹性各向异性减小了超位错的分解宽度,并且,使螺型超位错和刃型超位错的分解宽度差别减小.超位错发生三重或四重分解时,形成内禀性层错(SISF)的分解宽度小于其发生二重分解时的分解宽度.非共面分解对超位错的分解宽度也有一定的影响,随分解位错的Burgers矢量不同而不同.实验结果表明,温度变化对＜101]型超位错的分解宽度几乎没有影响,显示了剪切模量和层错能随温度变化而具有相同的变化趋势.＜101]型超位错在γ/γ层片界面附近的分解宽度不同于γ层片内,位错分解位置愈靠近γ/γ层片界面,分解宽度愈窄.
参考文献
| [1] | Hug G, Loiseau A, Veyssiere P. Philos Mag A, 1998; 57:499 |
| [2] | Yoo M H, Fu C L. In: Stoloff N S, Jones R H eds, Role of Interfaces in Deformation and Fracture: Titanium Aluminides, Processing and Design Issues in High Temperature Materials, Warrendale: MTS; 1997:57 |
| [3] | Bisplinghoff R L, Mar J W, Pian T H H. Statics of Deformable Solids. MA: Addison-Wesley Publishing Company Inc, 1965:7 |
| [4] | Auld B A. Acoustic Fields and Waves in Solids. New York: John Wiley and Sons Inc, 1973:1 |
| [5] | Chen H S. Anisotropy in Metals. Beijing: Metallurgy Industry Publisher, 1996: 1(陈洪荪.金属的弹性各向异性.北京:冶金工业出版社,1996:1) |
| [6] | Yoo M H, Fu C L. Metall Mater Tran A, 1998; 29A: 49 |
| [7] | Zhang L C, Chen G L, Wang J G, Ye H Q, Mater Sci Eng A, 1998; 247A: 1 |
| [8] | Zhang W J, Liu Z C, Chen G L, Kim Y W. Mater Sci Eng A, 1999; 271A: 416 |
| [9] | Song X P, Chen G L. J Mater Sci Lett, 2001; 20:6590 |
| [10] | Yamaguchi M, Umakoshi Y. Pro Mater Sci, 1990; 34:1 |
| [11] | Woodward C, MacLaren J M, Rao S. J Mater Res, 1992;7:1735 |
| [12] | Gallacher P C J. Metall Tran, 1970; 1:2429 |
| [13] | Zhang L C. D Thesis, Univ Sci Technology of Beijing,1999(张立春.北京科技大学博士论文,1999) |
| [14] | Zhang W J, Appel F. Acta Metall Mater, in press |
| [15] | Song X P. Study Report of Postdoctoral Fellowship, Univ Sci Technology of Beijing, 2001(宋西平.北京科技大学博士后出站报告,2001) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%