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Deformation response and microstructural evolution of as-cast Mg alloys AM30 and AM50 during hot compression

  • Anuj Bisht , Nikki Kamble , Lailesh Kumar , G. S. Avadhani , Anish Roy , Vadim Silberschmidt and Satyam Suwas
Published/Copyright: June 3, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 6

Abstract

The present study deals with the hot deformation behaviour of as-cast Mg alloys AM30 and AM50. The alloys have been investigated for mechanical and microstructural evolution in the temperature range 423–623 K and strain rate range of 10−3–10 s−1. A safe processing domain is identified for as-cast AM30 and AM50 alloys from the strain rate sensitivity map. The deformed microstructure of both AM30 and AM50 alloy reveals the occurrence of dynamic recovery and recrystallization for temperature above 523 K. Although the two alloys show similar behaviour in the hot deformation regime, they deviate at 623 K and low strain rate, where AM30 is fully recrystallized while AM50 attains necklace structure after deformation. This is likely due to the difference in the rate of dynamic recovery in the two alloys owing to the difference in Al concentration. Continuous dynamic recrystallization was the recrystallization mechanism active in the processing regime as deduced from the EBSD investigation.

Keywords: Mg alloys; Hot deformation; Deformation mechanism maps; Strain-rate sensitivity; Mechanical properties
∗Correspondence address, Prof. Satyam Suwas, Department of Materials Engineering, Indian Institute of Science, Bangalore – 560012, India, Tel: +91-(0) 80-2293 3245 (Office), Fax: +91-(0) 80-2360-0472, Email:

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Received: 2018-09-27
Accepted: 2018-12-27
Published Online: 2019-06-03
Published in Print: 2019-06-12

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111766
Keywords for this article
Mg alloys; Hot deformation; Deformation mechanism maps; Strain-rate sensitivity; Mechanical properties

Articles in the same Issue

  1. Original Contributions
  2. Experimental investigation of gas/slag/matte/tridymite equilibria in the Cu–Fe–O–S–Si system in controlled gas atmosphere at T = 1 200 °C and P(SO2) = 0.1 atm
  3. Thermodynamic calculation of phase equilibria in the Bi–Mg–Zn ternary system
  4. Effect of pre-rafting on creep properties of Ni-based single crystal superalloy
  5. Effect of thermomechanical treatment on the microstructures and mechanical properties of an ultrafine grained steel using bainite starting microstructure
  6. Deformation response and microstructural evolution of as-cast Mg alloys AM30 and AM50 during hot compression
  7. Effects of graphene nanoplatelets on the tribological, mechanical, and thermal properties of Mg-3Al alloy nanocomposites
  8. Increasing cold workability of Ti-6Al-4V alloy via thermo-mechanical processing: simulation and experiment
  9. Synthesis, characterization, and possible application as sorbents of new low-cost aluminosilicate materials with different Si/Al ratios
  10. Self-assembly of Pd@Au core/shell nanosheets used as a highly sensitive SERS substrate based on the determination of trace fluorescent dye
  11. Short Communications
  12. On the material characteristics of a high carbon cast austenitic stainless steel after solution annealing followed by quenching in a CNT nanofluid
  13. Influence of in-situ Al2O3 content on mechanical properties of Al2O3 reinforced Fe–Cr–Ni alloys
  14. Novel synthesis of Ti2SC powder using FeS2 as a sulphur source
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