Paper Title:
The Microstructure of AZ 31 Magnesium Alloy by Forward Extrusion with Various Extrusion Parameters
  Abstract

Samples of AZ31 wrought magnesium alloy are hot extruded into forward direction with various initial billet temperatures and extrusion ratios (ERs). Usually the insufficient room temperature formability of magnesium wrought alloys makes processing steps like rolling, extrusion etc. difficult, thus limiting their use for rolled or wrought parts. However, in this paper experiment is preformed under the hot forward extrusion process for AZ31 wrought magnesium alloy with different important parameters. Major process parameters such as punch speed, billet temperatures and ERs are considered and applied to the hot extrusion process with a constant value of the die land. The influence of different billet temperatures and ERs on the hot forward extrusion process is investigated and analyzed in terms of the grain flow, microstructure, grain size and hardness distribution of formed part for magnesium and Mg alloy. Maximum forming loads for various main parameters is tackled and checked to know the optimum forming load for hot forward extrusion process. Also finest grain sizes and an inhomogeneous microstructure of extruded parts seem to occur near the die land of tool-set due to the anisotropic plastic behavior during the hot extrusion process. Extrusion properties such as extrusion load, grain size, micro hardness and surface quality are compared between the main parameters during the hot forward extrusion process. In addition it is easily disclosed from the experiment results that the die land designed for safe tool-set plays a key role in improving the mechanical properties of formed product during hot forward extrusion process for AZ31 magnesium alloy.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
1818-1823
DOI
10.4028/www.scientific.net/MSF.539-543.1818
Citation
D. J. Yoon, K. H. Na, C. D. Cho, "The Microstructure of AZ 31 Magnesium Alloy by Forward Extrusion with Various Extrusion Parameters", Materials Science Forum, Vols. 539-543, pp. 1818-1823, 2007
Online since
March 2007
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: Young Ok Yoon, Shae K. Kim
Abstract:Thixoextrusion process has been developed for improving productivity, reducing extrusion pressure, extending die life and even cost saving...
787
Authors: Young Seok Song, M.R. Lee, Jeong Tae Kim
Abstract:Alloy 718 ingot with a diameter of 400mm was made by the vacuum melting process ; VIM followed by VAR. Compression tests were conducted on...
3124
Authors: Traian Canta, Dan Frunză, Eniko Szilagyi, Magdalena Lungu
Abstract:The paper presents the experimental results on an aluminum alloy and a silver alloy processed by equal channel angular extrusion in order to...
215
Authors: Jun Xu, Shao Ming Zhang, Bi Cheng Yang, Li Kai Shi, Z. Fan
Abstract:A new rheo-extrusion technique has been developed to produce extruded profiles. The AZ31 slurry is fabricated by a twin-screw mechanism, and...
713
Authors: Chin Tarn Kwan, Zhi Kai Chang
Chapter 1: Deformation Processing
Abstract:In this paper, the finite element method is used to investigate the effect of preform shapes on the strain hardening distribution in the wall...
247