Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1575046 | Materials Science and Engineering: A | 2014 | 12 Pages |
Abstract
A low rhenium-containing single crystal nickel-based superalloy designated DD6 with different γⲠmorphologies induced by discrepant aging treatments crept at 1100 °C/137 MPa and 850 °C/660 MPa. The test results and TEM observations showed that creep mechanism varies with microstructure and test temperature. For creep at 1100 °C/137 MPa, the dislocation network on γ/γⲠinterface plays a key role in prolonging creep life. The sample with the lager cubical γⲠprecipitate got the longest rupture life. For creep at 850 °C/660 MPa, the morphology of γⲠphase and the width of the γ channels dominate the deformation behavior. The sample with smaller γⲠparticles and narrower γ channel exhibited the highest creep life due to the inhomogeneous activations of multiple ã112ã {111} slip systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Nairong Sun, Lanting Zhang, Zhigang Li, Aidang Shan,