Paper Title:
Effect of Process Parameters on Microstructures of 7055 Aluminum Alloy in Creep Age Forming
  Abstract

The effects of process parameters on evolution of microstructures of 7055 aluminum alloy in creep age forming were studied and the microstrucures were analyzed using transmission electron microscopy (TEM). Some important results are obtained: with the increasing of ageing time, the size of platelet shaped (known as Guinier-Preston (G-P) zones) precipitates and spherical shaped η' precipitates increased, the number of platelet shaped precipitates increased too, while the number of η' precipitates decreased; the precipitates with almost the same size distributed continuously and uniformly along the grain boundary with quite narrow precipitate free zones (PFZs) at 5 hours of ageing time, when the ageing time increases to 8 hours, the distribution of the precipitates along the grain boundary becomes discontinuous and the PFZs gets wider, while with the further increasing of the ageing time, the precipitates distributed continuously again along the grain boundary and the PFZs become more wider. From comparison of stress-aged alloy to stress-free-aged alloy, it was found that after 20 hours ageing, the precipitates in the stress-aged alloy are slightly coarser and the PFZs are wider, the density of retained η' is lower with the development of η phase.

  Info
Periodical
Chapter
Chapter 1: Metal Materials
Edited by
Linli Xu, Wenya Tian and Elwin Mao
Pages
40-45
DOI
10.4028/www.scientific.net/AMM.80-81.40
Citation
L. H. Zhan, Y. G. Li, M. H. Huang, "Effect of Process Parameters on Microstructures of 7055 Aluminum Alloy in Creep Age Forming", Applied Mechanics and Materials, Vols. 80-81, pp. 40-45, 2011
Online since
July 2011
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: Li Hua Zhan, Yan Guang Li, Ming Hui Huang, Jian Guo Lin
Materials Processing Technology
Abstract:In order to study the similarities and dissimilarities between creep and stress relaxation behavior of age formed aluminum alloys, both creep...
772
Authors: Qiong Hui, Xiang Yi Xue, Hong Chao Kou, Min Jie Lai, Bin Tang, Jin Shan Li
Abstract:A newly near-β titanium alloy Ti-7Mo-3Cr-3Nb-3Al (Ti-7333) was subjected to β phase solution treatment and ageing in the present work. The...
904
Authors: Yong Li, Zhusheng Shi, Yo Lun Yang, Jian Guo Lin
Chapter 6: Microstructure and Properties
Abstract:The tensile and compressive creep behaviour of aluminium alloy 2050 with T34 initial temper (AA2050-T34) during creep-ageing process has been...
323
Authors: Olaf Engler, C. Schäfer, Henk Jan Brinkman, Calin D. Marioara, Masaya Kozuka, Hisao Shishido, Yasuhiro Aruga
Chapter 2: Phase Transformations
Abstract:In this study we aim at combining the results from transmission electron microscopy (TEM) and atom probe tomography (APT) to study the early...
231