Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 740, Issue -, Pages 174-181Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.10.028
Keywords
Constitutive Modeling; Magnesium alloys; Extrusion
Categories
Funding
- United States Department of Energy, National Energy Technology Laboratory [DE-EE0005660]
- agency of the United States Government
- Loewy Family Foundation, through the Loewy Professorship at Lehigh University [11.11.110.593]
Ask authors/readers for more resources
The high temperature deformation behavior of a new magnesium alloy, ZE20 (Mg-2.4%Zn-0.2%Ce), using uniaxial isothermal compression testing, is investigated within the paper. A set of experiments was conducted at temperatures of 350-425 degrees C, and strain rates in the range of 0.01 s(-1) to 10 s(-1), and samples were compressed by 70% of their original length. An inverse analysis approach was used to evaluate flow stress curves based on load displacement measurements for each deformation condition. Flow stress evolution for the new alloy under these test conditions showed higher flow stress and lower work softening than commercially available magnesium casting alloys. Finally, constitutive equations predicting flow stress as a function of strain, strain rate, and temperature were applied to modeling mechanical response of the new alloy. Predictions from three constitutive models of steady state stress were validated against uniaxial compression data. It was found that all three models evaluated reliably predict the high strain stress values to within 15% of measured values.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available