Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1500201 | Scripta Materialia | 2010 | 4 Pages |
Abstract
Cyclic softening is observed in the polycrystalline Ni-based superalloy R104 at elevated temperatures. Using transmission electron microscopy characterization methods, the damage evolution in fatigued specimens was studied. The observed deformation modes include paired APB shearing, intense planar dislocation bands, and cross-slipping processes between {1 1 1} and {0 0 1} planes. A rationale for the observed mechanisms in terms of time-dependent damage processes will be discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Patrick J. Phillips, Raymond R. Unocic, L. Kovarik, David Mourer, Dan Wei, Michael J. Mills,