NDLI: Coupled Influence of Temperature and Strain Rate on Tensile Deformation Characteristics of Hot-Extruded AZ31 Magnesium Alloy

Content Provider	Springer Nature Link
Author	Li, Xiao Wu Deng, Wan Peng Wang, Zhong Jun Zhu, Jing Yan, Ying Gao, Zhan Feng
Copyright Year	2016
Abstract	To explore the coupled effect of temperature T and strain rate $$\dot{\varepsilon }$$ on the deformation features of AZ31 Mg alloy, mechanical behaviors and microstructural evolutions as well as surface deformation and damage features were systematically examined under uniaxial tension at T spanning from 298 to 523 K and $$\dot{\varepsilon }$$ from 10$^{−4}$ to 10$^{−2}$ s$^{−1}$. The increase in T or the decrease in $$\dot{\varepsilon }$$ leads to the marked decrease in flow stress, the appearance of a stress quasi-plateau after an initially rapid strain hardening, and even to the occurrence of successive strain softening. Correspondingly, the plastic deformation modes of AZ31 Mg alloy transform from the predominant twinning and a limited amount of dislocation slip into the enhanced non-basal slip and the dynamic recrystallization (DRX) together with the weakened twinning. Meanwhile, the cracking modes also change from along grain boundaries (GBs) and at twin boundaries (TBs) or the end of twins into nearby GBs where the DRX has occurred. The appearance of a stress quasi-plateau, the formation of large-sized cracks nearby GBs, and the occurrence of continuous strain softening, are intimately related to the enhancement of the non-basal slip and the DRX.
Starting Page	163
Ending Page	172
Page Count	10
File Format	PDF
ISSN	10067191
Journal	Acta Metallurgica Sinica (English Letters)
Volume Number	29
Issue Number	2
e-ISSN	21941289
Language	English
Publisher	The Chinese Society for Metals
Publisher Date	2016-02-05
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Temperature Deformation Organometallic Chemistry Twinning Metallic Materials Spectroscopy/Spectrometry Uniaxial tension AZ31 Mg alloy Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Damage Nanotechnology Strain rate
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Metals and Alloys

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