Liquid segregation behavior of semi-solid AZ91 alloy during back extrusion test

被引：17

作者：

Khosravani, A. ^{[1
]}

Aashuri, H. ^{[1
]}

Davami, P. ^{[1
]}

Narimannezhad, A. ^{[1
]}

Hadian, R. ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 477卷 / 1-2期

关键词：

Liquid segregation; AZ91; Back extrusion; Thixoforming; STRAIN-RATE;

D O I：

10.1016/j.jallcom.2008.10.149

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present work is focused on the segregation behavior of semi-solid AZ91 magnesium alloy with Ca content. For this purpose a simple back extrusion test was used and the semi-solid billet was fabricated through a cooling slope. Different shear rates were obtained by variation in ram speed and extrusion ratio. Microstructures of the extruded samples were investigated and liquid segregation was described by Darcy's law. Homogeneity was improved by using higher shear rates, produced either by increasing plunger velocity or extrusion ratio, while at very high shear rates the air was entrapped inside the wall of the extruded sample. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：822 / 827

页数：6

共 13 条

[1] Thin-wall back extrusion of partially remelted semi-solid Sn-Pb [J].