|
|
|
| EVOLUTIONS OF GRAIN ORIENTATION AND DISLOCATION BOUNDARY IN AA1050 ALUMINUM ALLOY DURING COLD ROLLING FROM LOW TO MEDIUM STRAINS |
| LIU Qing 1;2; YAO Zongyong 1; A. Godfrey 1; LIU Wei1 |
1. Department of Materials Science and Engineering; Tsinghua University; Beijing 100084
2. School of Materials Science and Engineering; Chongqing University; Chongqing 400044 |
|
Cite this article:
LIU Qing; YAO Zongyong; A. Godfrey; LIU Wei. EVOLUTIONS OF GRAIN ORIENTATION AND DISLOCATION BOUNDARY IN AA1050 ALUMINUM ALLOY DURING COLD ROLLING FROM LOW TO MEDIUM STRAINS. Acta Metall Sin, 2009, 45(6): 641-646.
|
|
|
Abstract The dislocation boundary structure evolution in AA1050 aluminum alloy during cold rolling from low to medium strains was investigated using electron channeling contrast (ECC) imaging and the electron backscattered diffraction (EBSD) techniques. The results show that the grains are subdivided into a typical cell--block structure and there is a strong correlation between deformation microstructure and grain orientation. Based on the characterizations of grain subdivision and dislocation boundary structure, grains can be classified into three types: Type A---grains containing two sets of geometrically necessary boundaries (GNBs), Type B---grains containing one set of GNBs, and Type C---grains consisting of large dislocation cells structure. Most of grains with Copper, Brass and Goss orientations have Type A microstructure; grains with S orientation have Type B microstructure, grains with Cube orientation have Type C microstructure. The alignment of the extended dislocation boundaries depends strongly on the grain orientation. In most grains the boundaries have inclination angles of ±(30°---40°) to rolling direction (RD), and are approximately parallel to the traces of the most active {111} slip planes as identified by a Schmid factor analysis.
|
|
Received: 26 November 2008
|
|
|
| Fund: Supported by National Natural Science Foundation of China (Nos.50231030 and 50571051) |
| [1] Kuhlmann–Wilsdorf D, Hansen N. Scr Metall Mater,1991; 25: 1557
[2] Liu Q, Hansen N. Scr Metall Mater, 1995; 32: 1289
[3] Liu Q, Juul Jensen D, Hansen N. Acta Mater, 1998; 46:5819
[4] Liu Q, Hansen N. Phys Status Solidi, 1995; 149A: 187
[5] Hansen N. Metall Mater Trans, 2001; 32A: 2917
[6] Hughes D A, Liu Q, Chrzan D C, Hansen N. Acta Mater,1997; 45: 105
[7] Godfrey A, Hughes D A. Acta Mater, 2000; 48: 1897
[8] Huang X, Winther G. Philos Mag, 2007; 87: 5189
[9] Winther G, Huang X. Philos Mag, 2007; 87: 5215
[10] Huang X, Hansen N. Scr Mater, 1997; 37: 1
[11] Hansen N, Huang X. Acta Mater, 1998; 46: 1827
[12] Hansen N, Huang X, Winther G. Mater Sci Eng, 2008;A494: 61
[13] Yang P, Li C M, Liu D M, Huang M, Li M, Meng L. Mater Sci Technol, 2005; 21: 1444
[14] Wu G L, Liu W, Godfrey A, Liu Q. Acta Metall Sin, 2004; 40: 699
(吴桂林, 刘伟, Godfrey A, 刘 \ \ 庆. 金属学报, 2004; 40: 699)
[15] Mao W M, Jiang H, Yang P, Feng H, Yu Y. Mater Sci Technol, 2005; 21: 1383
[16] Li X L, Liu W, Godfrey A, Juul Jensen D, Liu Q. Acta Mater, 2007; 55: 3531
[17] Li Z J, Godfrey A, Liu Q. Acta Mater, 2004; 52: 149
[18] Yao Z Y, Liu Q, Godfrey A, Liu W. J Chin Electron Microsc Soc, 2008; 27: 452
(姚宗勇, 刘 庆, Godfrey A, 刘 伟. 中国电子显微学报, 2008; 27: 452)
[19] Hughes D A, Hansen N. Metall Trans, 1993; 24A: 2021
[20] Liu Q, Maurice C, Driver J, Hansen N. Metall Mater Trans, 1998; 29A: 2333
[21] Daaland O, Nes E. Acta Mater, 1996; 44: 1389
[22] Humphreys F J, Bate P S, Acta Mater, 2006; 54: 817
[23] Humphreys F J, Bate P S, Acta Mater, 2007; 55: 5630
[24] Winther G. Acta Mater, 2003; 51: 417
[25] Winther G, Huang X, Godfrey A, Hansen N. Acta Mater, 2004; 52: 4437 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
