Capturing recrystallization of metals with a multi-scale materials model

Hughes, D. A. ; Bammann, D. J. ; Godfrey, A. ; Prantil, V. C. ; Holm, E. A. ; Miodownik, M. A. ; Chrzan, D. C. ; Lusk, M. T.

Sandia National Laboratories

关键词: Aluminium;    36 Materials Science;    Dislocations;    Mathematical Models;    Three-Dimensional Calculations;   

DOI  :  10.2172/755112
RP-ID  :  SAND2000-8232
RP-ID  :  AC04-94AL85000
RP-ID  :  755112

美国|英语

来源: UNT Digital Library

【 摘 要 】

The final report for a Laboratory Directed Research and Development project entitled, ``Capturing Recrystallization of Metals in a Multiscale Materials Model'' is presented. In this project, deformation and recrystallization processes have been followed experimentally and theoretically in order to incorporate essential mechanisms from the defect (dislocation) and grain size length scales. A nonlinear rotational gradient theory has been developed which enables the incorporation of microstructural parameters. The evolution of these parameters during deformation and recrystallization has been characterized qualitatively and quantitatively, applying various electron optic techniques ranging over several length scales. The theoretical and experimental framework developed is general. It has been exemplified by an application to recrystallization in single crystals and bicrystals of aluminum. The recrystallization process has been modeled using a 3-D model for the changes in key structural parameters during recrystallization.