Dynamic Response of Magnesium Alloy AZ31B and Aluminum Alloys 7039, 6061, 5083, and 5059.

摘要

A large number of studies have examined a wide range of light metals and their alloys to determine the uni-axial stress behavior under quasi-static loading conditions. However, the dynamic response of these same metals as a function of stress state has received relatively less attention. As a result, the dynamic response of these metals is often poorly understood. For this reason, the dynamic response of five light metals has been examined as a function of stress state, temperature, texture, and dynamic strain rate. Specimens of Al 7039, Al 6061, Al 5083, Al 5059, and AZ31B, a magnesium alloy, have been characterized prior to deformation and then dynamically loaded in compression, tension and shear. Optical microscopy, scanning electron microscopy and electron back-scattered diffraction were employed for post mortem characterization of these specimens. These characterization techniques have been utilized to correlate the observed mechanical response to the microstructural evolution during loading and to the damage and failure of these materials.