The Microstructure and High-Strain-Rate Superplasticity of the Al–Mg–Ni–Fe–Mn–Cr–Zr Alloy
- Authors: Kishchik A.A.1, Kotov A.D.1, Mikhaylovskaya A.V.1
-
Affiliations:
- National University of Science and Technology “MISiS”
- Issue: Vol 120, No 10 (2019)
- Pages: 1006-1013
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/168773
- DOI: https://doi.org/10.1134/S0031918X19100041
- ID: 168773
Cite item
Abstract
The microstructure, superplasticity characteristics at a subsolidus temperature (540°C), and the room-temperature mechanical properties of an alloy of the Al–Mg–Ni–Fe–Mn–Cr–Zr system have been investigated using the methods of scanning and transmission electron microscopy and uniaxial tensile tests. The alloy has a bimodal particle-size distribution; it contains eutectic particles of Al9FeNi with an average size of 0.6 μm; and dispersoids with an average size of 75 nm. The particles of the secondary phases ensure grain size of approximately 4 μm after the recrystallization subsolidus annealing of the cold-rolled sheet. Due to the microsize grain structure, the alloy demonstrates a relative elongation to 500% at a subsolidus temperature in the range of the constant strain rates of 5 × 10–3 to 3 × 10–2 s–1, yield stress 215 MPa, and ultimate strength 330 MPa.
Keywords
About the authors
A. A. Kishchik
National University of Science and Technology “MISiS”
Email: mihaylovskaya@misis.ru
Russian Federation, Moscow, 119049
A. D. Kotov
National University of Science and Technology “MISiS”
Email: mihaylovskaya@misis.ru
Russian Federation, Moscow, 119049
A. V. Mikhaylovskaya
National University of Science and Technology “MISiS”
Author for correspondence.
Email: mihaylovskaya@misis.ru
Russian Federation, Moscow, 119049
![](/img/style/loading.gif)