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Effects of the process parameters on the formability of the intermetallic zone in two-layer Mg/Al materials

Mola R., Mroz S., Szota P.

Archives of Civil and Mechanical Engineering

2018

Vol. 18, no. 4

1401--1409

This paper discusses experimental results concerning the plastic deformation of the bonding zone in a two-layer AZ31/Al material subjected to compression loads. The specimens were fabricated by diffusion bonding method. The 50 μm thick transition zone at the AZ31/Al interface contained Mg–Al intermetallic phases. The physical modelling of the deformation behaviour of the intermetallic zone was performed using a Gleeble 3800 system. The compression tests were carried out at two temperatures (300 and 400 °C), two strain rates (0.1 and 1.0 s−1) and a true strain of 0.15 applied in one or two stages. The metallographic examinations and microhardness measurements were performed to assess the influence of the selected process parameters on the forming behaviour of the intermetallic zone. The experiments revealed that the main factors affecting the formability of the intermetallic zone in the two-layer AZ31/Al material were the strain rate and the temperature. It was found that when the deformation occurred at a strain rate of 0.1 s−1 and a temperature of 400 °C, there was no loss of continuity of the intermetallic transition zone; such conditions induced its plasticization.

FE and physical modelling of plastic deformation the two-layer Mg/Al materials

Mróz S., Stefanik A., Szota P.

Computer Methods in Materials Science

2017

Vol. 17, No. 3

145--152

The paper has presented the results of theoretical studies and experimental tests of the plastic deformation of two- layered Mg/Al specimens. Theoretical studies were carried out using the Forge2011® computer program. Physical modeling, on the other hand, was performed using the Gleeble3800 simulator. Cuboidal specimens with dimensions of 10x15x20 mm and a cladding layer thickness of 1.5 mm were cut off from the sheets obtained in the explosive welding method. The theoretical studies and experimental tests were carried out for the temperature range from 350 to 400°C and for different strain rates. Based on the obtained investigation results it has been found that the main parameters influencing the formability of two-layered Mg/Al materials are temperature and the strain rate.

W pracy przedstawiono wyniki badań teoretycznych i do-świadczalnych plastycznego odkształcenia dwuwarstwowego materiału Mg/Al. Badania teoretyczne przeprowadzono za pomocą programu komputerowego Forge20ll®, natomiast modelowanie fizyczne wykonano za pomocą symulatora Gleeble3800. Badaniom poddano próbki prostopadłościenne o wymiarach 10x15x20 mm i grubość warstwy platerującej 1,5 mm. Dwuwarstwowy materiał, z którego pobrano próbki otrzymano metodą zgrzewania wybuchowego. Badania teoretyczne i doświadczalne wykonano dla zakresu temperatur od 300 do 400°C oraz dla różnych prędkości odkształcenia. Na podstawie otrzymanych wyników badań stwierdzono, że głównymi parametrami wpływającymi na odkształcalność prętów bimetalowych Mg/Al są temperatura oraz prędkość odkształcenia.