Strain hardening, twinning and texture evolution in magnesium alloy using the all twin variant polycrystal modelling approach
| Autor: | Prakash C. Gautam, Laszlo S. Toth, Benoît Beausir, Somjeet Biswas, Sudeep K. Sahoo |
|---|---|
| Přispěvatelé: | Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal 721302, India, Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Labex DAMAS, Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Misorientation Thermodynamics 02 engineering and technology Slip (materials science) 01 natural sciences [SPI]Engineering Sciences [physics] 0103 physical sciences General Materials Science Magnesium Texture Magnesium alloy Polycrystal modelling Strain hardening 010302 applied physics Viscoplasticity Mechanical Engineering Strain hardening exponent 021001 nanoscience & nanotechnology Mechanics of Materials Volume fraction Hardening (metallurgy) All twin variants approach Extension twins 0210 nano-technology Crystal twinning |
| Zdroj: | International Journal of Plasticity International Journal of Plasticity, Elsevier, 2020, 128, pp.102660. ⟨10.1016/j.ijplas.2020.102660⟩ |
| ISSN: | 0749-6419 |
| DOI: | 10.1016/j.ijplas.2020.102660⟩ |
| Popis: | In this work, the viscoplastic self-consistent based All Twin Variant (ATV) polycrystal modelling was employed to decipher the deformation behaviour of Mg–3Al-0.3Mn Magnesium alloy that develops { 10 1 ‾ 2 } 1 ‾ 011 - extension twins profoundly during ambient temperature compression. Twinning was considered by taking into account all the potential { 10 1 ‾ 2 } − twin variants, and hence called here as the ‘ATV’ approach. The model treats each twin variant as a grain with increasing volume fraction transferred from the respective parent grain according to its pseudo-slip shear-rate. The slip and twin-induced strain hardening were simulated by adopting a classical phenomenological hardening model while assigning a higher hardening coefficient for the twins relative to the parent matrix. The viscoplastic self-consistent polycrystal homogenisation scheme combined with the ATV approach permitted to reproduce with high precision the experimentally measured strain hardening behaviour, crystallographic texture and twin volume fraction evolution. Beyond these average measures, the activities of twin variants in individual grains could be predicted in good agreement with Electron Back-Scattered Diffraction measurements. The ATV approach permits also to examine the matrix and twin phases separately in terms of textures and misorientation distributions. |
| Databáze: | OpenAIRE |
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