Void Growth and Coalescence in Aluminum Alloy
This paper investigates the mechanism of void evolution and the anisotropy of the material failure in high strength rolled aluminum alloy 7075-T7351. The mechanical properties of the aluminum specimens were characterized in three principal directions, i.e. rolling (R), transverse (T), and short transverse (S). The grain microstructure of the virgin material was examined using an optical microscope. In-situ X-Ray tomography was performed at incremental loading steps during tensile loading of the specimens. These acquired radiographs were reconstructed to generate tomograms, which were then rendered in different planes to study void distribution, as well as void evolution mechanism for specimens loaded in different orientations.
KeywordsDamage Evolution Void Growth Material Failure Virgin Material Short Transverse
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. The authors greatly appreciate the help from the staff members Alastair MacDowell, Dula Parkinson and Jamie Nasiatka at Advanced Light Source, Lawrence-Berkeley National Laboratory.