Volume no :1, Issue no: 1, January (2010)

EFFECT OF EXTRUSION TEMPERATURES ON THE MICROSTRUCTURE AND TENSILE PROPERTIES OF AM30 ALLOY TUBES

Author's: Wenyun Wu, Li Jin, Jie Dong, Haiyan Jiang and Shoushan Yao
Pages: [1] - [13]
Received Date: November 5, 2009; Revised February 20, 2010
Submitted by: Qingyun Sha

Abstract

The influences of extrusion temperatures on the microstructure and tensile properties of AM30 alloy tubes were investigated. The results suggested that the yield and tensile strength of AM30 alloy tubes decrease, but elongation increases with the increase of extruded temperatures. Low temperature extrusion produces fine grains with texture of c-axis perpendicular with tube axis. The tension deformation is dominated by slip and the formed texture is obstructive for the basal slip, and also the inhomogeneous structure formed at lower temperature extrusion is harmful to the ductility. Tubes extruded at higher temperature have comparatively homogeneous and coarse micro-structure. Twinning provided more tension deformation and the lattice rotation induced by twinning is favorable for the activities of new slip systems, which induced the better ductility of AM30 alloy tubes.

Keywords

magnesium alloy, extrusion tube, microstructure, tensile property.