Paper Title:
Strain-Induced Grain Refinement in Magnesium Alloy AZ31 during Hot Forging
  Abstract

Strain-induced grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a temperature range from 423K to 623K and at a strain rate of 3x10-3s-1. MDF with a pass strain of 0.8 was carried out to high cumulative strains of around 5 with changing of the loading direction during decreasing temperature from pass to pass. The structural changes can be characterized by the evolution of many mutually crossing kink bands at low strains followed by increase in their number and misorientation, finally resulting in a fully developed fine-grains at high strains. MDF with decreasing temperature can accelerate the evolution of much finer grains and the improvement of plastic workability. An average grain size of 0.3 μm is formed at an accumulative strain of 4.8 and at 423K. It is concluded that grain refinement under MDF conditions occurs by a series of deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization (cDRX).

  Info
Periodical
Materials Science Forum (Volumes 503-504)
Edited by
Zenji Horita
Pages
521-526
DOI
10.4028/www.scientific.net/MSF.503-504.521
Citation
X. Y. Yang, J. Xing, H. Miura, T. Sakai, "Strain-Induced Grain Refinement in Magnesium Alloy AZ31 during Hot Forging", Materials Science Forum, Vols. 503-504, pp. 521-526, 2006
Online since
January 2006
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: 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: Zhi Min Zhang, Qiang Wang, B.C. Li, X. Zhang
Abstract:Warm compression tests of AZ31 Mg alloy were carried out at five temperatures in 30°C intervals from 210°C to 330°C. The samples of...
1813
Authors: Cui Li, Wei Qi, Kutsuna Muneharu
Abstract:A zircon coating was applied on the surface of Ti-6Al-4V alloy by plasma spray and its effect on the high temperature tensile properties of...
547
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