Effects of chemical composition and test conditions on the dynamic tensile response of Zr-based metallic glasses
MetadataShow full item record
The effects of impact velocity and temperature on the dynamic mechanical behavior of two bulk metallic (BMG) alloys with slightly different elemental compositions (Zr 55 Cu 30 Ni 5 Al 30 and Zr 46 Cu 38 Ag 8 Al 38 ) have been investigated. Bullet-shaped samples were accelerated by a gas gun to speeds in the 400~600m/s range and tested at both room temperature and 250°C. The samples impacted steel extrusion dies which subjected the bullets to high strains at relatively high strain-rates. The extruded fragments were subsequently soft recovered by using low density foams and examined by means of optical/scanning electron microscopy and differential scanning calorimetry. It was found that shear banding was the dictating mechanism responsible for the fracture of all BMGs. At room temperature, the Zr 55 Cu 30 Ni 5 Al 30 alloy exhibited a higher resistance to fragmentation than the Zr 46 Cu 38 Ag 8 Al 38 alloy. At 250 °C, significant melting was observed in the recovered fragments of both alloys, which indicates that the BMG glassy structure undergoes a melting process and deformation likely occurs homogeneously.
Showing items related by title, author, creator and subject.
Microstructures and electrochemical performances of Mm(NiCoMnAl)<inf>5</inf>-Mg<inf>2</inf>Ni hydrogen storage alloys prepared by casting and rapid quenchingWang, H.; Tian, X.; Shang, T.; Naren, G.; Liu, Jian; Yun, G. (2016)© 2016, Editorial Office of "Chinese Rare Earths". All right reserved. The as-cast Mm(NiCoMnAl)5-Mg2Ni composite hydrogen storage alloys were firstly prepared by two steps melting method. Then the as-cast Mm(NiCoMnAl)5-Mg2Ni ...
Rabadia, C.; Liu, Y.; Wang, L.; Sun, Hongqi; Zhang, L. (2018)In this work, a novel serial of Ti-33Zr-xFe-yCr (x = 3, 5, 7 wt% and y = 2, 4 wt%) alloys was designed first with an expectation to obtain Laves phase in microstructure and then these alloys were produced using cold ...
Investigation of the production and mechanical properties of porous Beta Titanium alloy compacts prepared by powder metallurgy processes for biomedical applicationsNugroho, Aris Widyo (2013)Titanium and its alloys are known to be widely used for biomedical applications due to their biocompatibility, and excellent corrosion resistance. The introduction of porosity into the metals may reduce the stiffness to ...