Constitutive behavior and processing maps of a new wrought magnesium alloy ZE20 (Mg-2Zn-0.2Ce)

Sutton, Scott C.; Luo, Alan A.

doi:10.1016/j.jma.2019.11.007

Title: Constitutive behavior and processing maps of a new wrought magnesium alloy ZE20 (Mg-2Zn-0.2Ce)

Journal Article · 30 January 2020 · Journal of Magnesium and Alloys

DOI: https://doi.org/10.1016/j.jma.2019.11.007 · OSTI ID:1799163

Sutton, Scott C. ^[1];

^[2]

The Ohio State Univ., Columbus, OH (United States); OSTI
The Ohio State Univ., Columbus, OH (United States)

ZE20 (Mg-2Zn-0.2Ce)² is a new wrought magnesium alloy with improved extrudability and mechanical properties [1]. To understand the constitutive behavior and workability of this new alloy, Gleeble thermomechanical testing has been carried out in this study. The flow stress behavior of ZE20 was investigated between 250 °C–450 °C and 10^–3 s^–1–1.0 s^–1 in isothermal compression. Constitutive descriptions of the flow stress are provided. A new general approach at application of the extended Ludwik equation is demonstrated and was found to be more accurate than the hyperbolic sine Arrhenius model while having a similar number of model constants. Processing maps were developed based on the experimental results and are verified with microstructural investigation. A region of safe processing with non-basal texture and high activity of dynamic recrystallization (DRX) was found between 375 °C and 450 °C, from 10^–1 s^–1 to 10–2.5 s^–1. A region of potentially safe processing with annealing that is associated with shear band nucleation of non-basal grains was identified for temperatures as low as 300 °C and rates as high as 10^–1 s^–1.

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Research Organization:: United States Council for Automotive Research, LLC, Southfield, MI (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); United States Automotive Materials Partnership (USAMP)

Grant/Contract Number:: EE0003583

OSTI ID:: 1799163

Journal Information:: Journal of Magnesium and Alloys, Journal Name: Journal of Magnesium and Alloys Journal Issue: 1 Vol. 8; ISSN 2213-9567

Publisher:: National Engineering Research Center for Magnesium Alloys of ChinaCopyright Statement

Country of Publication:: United States

Language:: English

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