Indian Journal of Engineering & Materials Sciences

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Temperature and Strain Rate Dependent Anisotropic Plastic Deformation Behavior of AZ31B Mg Alloy


Affiliations
1 Mechanical Engineering Department, BITS Pilani- Hyderabad Campus, Hyderabad 500 078, India
2 The Ohio State University 281 W Lane Ave, Columbus, OH 43 210, United States
3 Mechanical Engineering Department, GRIET, Hyderabad, 500 90, India
 

In the present study, the plastic deformation of commercially available AZ31B alloy at different temperatures (300K-473K) and strain rates (0.1s<sup>-1</sup>-0.01s<sup>-1</sup>-0.001s<sup>-1</sup>) under uniaxial tensile test has been carried out. Three different sheet orientations, viz., rolling direction (RD), transverse direction (TD), and 45° to rolling direction have been used. The outcomes of the experiments have demonstrated a temperature-dependent relationship between mechanical properties such as yield strength, ultimate tensile strength, and percentage elongation. The yield strength and ultimate tensile strength has decreased by 28.58% and 31.03% respectively as temperature increased from 300 K to 473 K. At elevated temperature (473 K) the material has exhibited highest ductility (64.88%) as compare to 300 K. The hardening exponent has been found to decrease with increasing temperature. The flow stress behaviour has been predicted using work hardening models such as the Hollomon and Ludwik. Two-stage work hardening behavior has been observed at all the temperatures. According to statistical parameter comparison, Ludwik equation prediction capability of correlation coefficient (0.9959) has been found to be best in agreement with the experimental results.

Keywords

AZ31B, Deformation Behavior, Strain Hardening Behavior, Sheet Metal, K-M plot.
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  • Temperature and Strain Rate Dependent Anisotropic Plastic Deformation Behavior of AZ31B Mg Alloy

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Authors

Aarjoo Jaimin
Mechanical Engineering Department, BITS Pilani- Hyderabad Campus, Hyderabad 500 078, India
Nitin Kotkunde
Mechanical Engineering Department, BITS Pilani- Hyderabad Campus, Hyderabad 500 078, India
Ayush Morchhale
The Ohio State University 281 W Lane Ave, Columbus, OH 43 210, United States
Aditya Raj Anand
Mechanical Engineering Department, BITS Pilani- Hyderabad Campus, Hyderabad 500 078, India
Anurag Sadhukhan
Mechanical Engineering Department, BITS Pilani- Hyderabad Campus, Hyderabad 500 078, India
Swadesh Kumar Singh
Mechanical Engineering Department, GRIET, Hyderabad, 500 90, India

Abstract


In the present study, the plastic deformation of commercially available AZ31B alloy at different temperatures (300K-473K) and strain rates (0.1s<sup>-1</sup>-0.01s<sup>-1</sup>-0.001s<sup>-1</sup>) under uniaxial tensile test has been carried out. Three different sheet orientations, viz., rolling direction (RD), transverse direction (TD), and 45° to rolling direction have been used. The outcomes of the experiments have demonstrated a temperature-dependent relationship between mechanical properties such as yield strength, ultimate tensile strength, and percentage elongation. The yield strength and ultimate tensile strength has decreased by 28.58% and 31.03% respectively as temperature increased from 300 K to 473 K. At elevated temperature (473 K) the material has exhibited highest ductility (64.88%) as compare to 300 K. The hardening exponent has been found to decrease with increasing temperature. The flow stress behaviour has been predicted using work hardening models such as the Hollomon and Ludwik. Two-stage work hardening behavior has been observed at all the temperatures. According to statistical parameter comparison, Ludwik equation prediction capability of correlation coefficient (0.9959) has been found to be best in agreement with the experimental results.

Keywords


AZ31B, Deformation Behavior, Strain Hardening Behavior, Sheet Metal, K-M plot.

References