INVESTIGATION OF PORTEVIN-LE CHATELIER EFFECT IN COARSE-GRAINED AL-MG ALLOYS

1 MOGUCHEVA Anna
Co-authors:
1 Yuzbekova Diana
Institution:
1 Laboratory of Mechanical Properties of Nanostructured Materials and Superalloys, Belgorod State University, Belgorod, Russia, mogucheva@bsu.edu.ru, yuzbekova@bsu.edu.ru
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1631-1634
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
19 views / 4 downloads
Abstract

The behavior of deformation bands associated with the Portevin-Le Chatelier (PLC) effect was studied in an Al-Mg alloy. The microstructure of the alloy consisted of coarse grains with approximately equiaxed shape and average size of 40 μm. A series of tensile tests was carried out at room temperature and initial strain rates of 1×10–3 s–1 and 5×10–3 s–1. Comparing different propagation characteristics of the PLC bands (the velocity of the PLC band propagation, the local strain rate within the band, the band width, and the angle of band) for the model coarse-grained alloy reveals numerous unusual features of spatiotemporal behavior observed at various stages of strain hardening the alloy. The specific mechanisms of plastic deformation at various stages of strain hardening are considered in some detail.

Keywords: Aluminum alloys, mechanical testing, microstructure, Portevin-Le Chatelier effect
Scroll to Top