Record Details

High-Temperature Tensile Flow Behavior of Caliber-Rolled Mg-3Al-1Zn Alloy

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title High-Temperature Tensile Flow Behavior of Caliber-Rolled Mg-3Al-1Zn Alloy
 
Creator DOIPHODE, RL
MURTY, SVSN
PRABHU, N
KASHYAP, BP
 
Subject AZ31 MAGNESIUM ALLOY
DYNAMIC CONTINUOUS RECRYSTALLIZATION
MECHANICAL-PROPERTIES
MG-ALLOY
GRAIN-REFINEMENT
HOT DEFORMATION
SUPERPLASTIC DEFORMATION
ROOM-TEMPERATURE
2-STAGE DEFORMATION
STRAIN DISTRIBUTION
 
Description Mg-3Al-1Zn (AZ31) alloy was caliber rolled isothermally in the temperature range of 523 K to 723 K (250 A degrees C to 450 A degrees C) to develop fine grains of 3 to 13 A mu m. Tensile tests by constant initial strain rate as well as differential strain rate test techniques were conducted over the temperature range of 493 K to 723 K (220 A degrees C to 450 A degrees C) and strain rate range of 10(-5) to 10(-1) s(-1). Maximum tensile elongation of 182 pct was obtained at test temperature of 723 K (450 A degrees C) and strain rate of 10(-3) s(-1) in the sample obtained from caliber rolling at 723 K (450 A degrees C), in spite of its large grain size of 13 A mu m. The strain rate sensitivity index 'm' was found to vary from 0.08 to 0.33 and activation energy for deformation 'Q' varied from 30 to 185 kJ mol(-1) depending on test condition and caliber-rolling condition. These variations in m and Q values are explained by the difference in prior grain size, texture, and twins developed as a function of caliber-rolling temperature, and further by the concomitant microstructural change occurring during tensile test itself. The presence of twins and orientation of grains influences the parameters of the constitutive relation to varying extent.
 
Publisher SPRINGER
 
Date 2016-01-14T12:21:04Z
2016-01-14T12:21:04Z
2015
 
Type Article
 
Identifier METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 46A(7)3028-3042
1073-5623
1543-1940
http://dx.doi.org/10.1007/s11661-015-2883-7
http://dspace.library.iitb.ac.in/jspui/handle/100/17483
 
Language en