Dynamic yield and spallation properties of aluminum alloys at different temperatures

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 596; pp. 222 - 228
• Main Authors: Wang, YongGang, Jiang, ZhaoXiu, Xing, MingZhi, Wang, LiLi
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 24.02.2014; Elsevier
• Subjects: Alloys; Aluminum alloys; Aluminum base alloys; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Devices; Dynamics; Elasticity, elastic constants; Exact sciences and technology; Fractures; Heating; HEL strength; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Mechanical properties of solids; Metals. Metallurgy; Physics; Spall strength; Spallation; Strength; Temperature dependence; Spall strength; Temperature dependence; HEL strength; Aluminum alloys; Heat treatment; Hugoniot curve; Temperature effect; Free surface; Velocity distribution; Real time; Velocity; Yield strength; Spallation; Damaging
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2013.12.055

The effects of temperature on the dynamic yield and spall behaviors of two aluminum alloys, 2024-T4 and 7075-T6, were investigated using plate-impact spall experiments, including real-time measurements of free surface velocity. A heating device was designed that was coupled to a light gas gun. Hugoniot elastic limit (HEL) strength and spall strength were calculated using the free surface velocity profiles. Normalized HEL strength and normalized spall strength of 2024-T4 and 7075-T6 exhibited a similar linear decrease with increasing temperature. Comparison of aluminum alloys and pure aluminum demonstrated differences in the correlation of HEL strength and spall strength. This difference was linked to the different underlying mechanisms of damage.