Paper Title:
The Effect of Precipitate Configuration on the Strain Hardening Behavior of Al-Mg-Si Alloy Sheet
  Abstract

The microstructure especially the size, shape, number and distribution of precipitate, together with the strain hardening exponent n value at different strain range during plastic deformation of the Al-0.9Mg-1.0Si-0.7Cu-0.6Mn alloy sheet, subjected to different heat treatment were investigated. The results showed that the strain hardening exponent n values of Al-0.9Mg-1.0Si-0.7Cu-0.6Mn alloy sheet at any different strain range are different from each other, which is in agreement with the result that the relationship between true strain and true stress of polycrystalline alloy sheet during tensile test does not fully meet the Hollomon formula. The continuous strain hardening exponent nc defined in this paper essentially represents the approximate liner strain hardening effect during the total calculating strain range, while the stage strain hardening exponent ns defined in the paper can objectively indicate the counteraction of the micro strain hardening with the micro strain softening of alloy sheet during plastic deforming. When the precipitate in the matrix of alloy sheet can be cut by dislocation, the alloy sheet has the weakest strain hardening effect at the beginning of yielding process. Otherwise, the alloy sheet has the most prominent strain hardening effect at the beginning of yielding process when the precipitate in the matrix can be bowed bypass operation of dislocation. Gridded precipites is of no advantage to the glide and multiplication of dislocation of alloy sheet.

  Info
Periodical
Advanced Materials Research (Volumes 146-147)
Edited by
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Pages
1163-1169
DOI
10.4028/www.scientific.net/AMR.146-147.1163
Citation
N. Tian, G. Zhao, B. Nie, J. J. Wang, L. Zuo, C. M. Liu, "The Effect of Precipitate Configuration on the Strain Hardening Behavior of Al-Mg-Si Alloy Sheet", Advanced Materials Research, Vols. 146-147, pp. 1163-1169, 2011
Online since
October 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: A.A. Kodentsov, M.J.H. van Dal, Csaba Cserháti, Lajos Daróczi, F.J.J. van Loo
73
Authors: Chang Liang Li, Hua Ding, Yong Qing Zhao, Lian Zhou
Abstract:Superplastic forming provides a good way for Ti alloys which are usually difficult to be deformed. Ti75 alloy with a nominal composition of...
2969
Authors: Zhi Guo Chen, Zi Qiao Zheng, Dong Feng Han
Abstract:The hot deformation behaviors and microstructure in Al-Cu-Li alloy containing small amount of Ag and Mg were investigated by transmission...
1925
Authors: Bao Hong Zhu, Bai Qing Xiong, Yon Gan Zhang, Udo Fritsching, Ji Shan Zhang, Feng Wang, Zhi Hui Li, Hong Wei Liu
Abstract:A high Zn content Al-Zn-Mg-Cu alloy was prepared by spray forming process and the precipitate behavior and microstructure of the extruded...
481
Authors: De Liang Zhang, Hong Bao Yu, Yuong Chen
Abstract:Bulk nanostructured (grain sizes in the range of 50-200nm) and ultrafine structured (grain sizes in the range of 100-500nm) -TiAl based...
149