| Numéro |
J. Phys. Colloques
Volume 51, Numéro C1, Janvier 1990
Proceeding of the International CongressIntergranular and Interphase Boundaries in materials |
|
|---|---|---|
| Page(s) | C1-203 - C1-208 | |
| DOI | https://doi.org/10.1051/jphyscol:1990131 | |
J. Phys. Colloques 51, C1-203-C1-208 (1990)
DOI: 10.1051/jphyscol:1990131
Department of Materials Science and Engineering, State University of New York at Stony Brooks, Stony Brook NY 11794-2275, U.S.A.
DOI: 10.1051/jphyscol:1990131
GRAIN BOUNDARY STRUCTURAL TRANSFORMATIONS IN HEXAGONAL CLOSE PACKED METALS
A.H. KING et KISOO SHINDepartment of Materials Science and Engineering, State University of New York at Stony Brooks, Stony Brook NY 11794-2275, U.S.A.
Abstract
Hexagonal metals differ in three important ways from cubic materials. First, the irrational c/a ratio precludes the formation of 3-dimensional CSLs, in general, so lattice coincidence is achieved on the basis of "constrained CSLs" or CCSLs. Second, the c/a ratio is temperature dependent, meaning that grain boundary geometry also changes with temperature. Third, the distribution of coincidence systems is highly inhomogeneous in misorientation space, meaning that clusters of CCSLs exist and it is possible for a boundary structure to transform from one CCSL-related form to a form related to another CCSL.