Elemental partitioning and site-occupancy in gamma/gamma ' forming Co-Ti-Mo and Co-Ti-Cr alloys
We report on the sub-nanometer scale characterization of Co-12Ti-4Mo and Co-12Ti-4Cr (at.%) model alloys. Atom probe tomography reveals that Co and Cr partition to gamma, whereas Ti and Mo to gamma'. Additions of Mo and Cr to the reference Co-12Ti system lead to strong increases in gamma' volume fraction by about 25% and 12%, respectively. Element-specific spatial distribution maps along the [001] direction of the L1(2)-ordered gamma' phase reveal that both Mo and Cr preferentially replace Ti on its sublattice. The remaining excess Ti is available for formation of additional gamma', resulting in enhanced gamma' volume fractions. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Issue Date
- 2018-09
- Language
- English
- Article Type
- Article
- Keywords
ATOM-PROBE TOMOGRAPHY; HIGH-TEMPERATURE ALLOYS; BASE SUPERALLOYS; MECHANICAL-PROPERTIES; LATTICE MISFIT; COBALT; CO3TI; TA; PHASE; SYSTEM
- Citation
SCRIPTA MATERIALIA, v.154, pp.159 - 162
- ISSN
- 1359-6462
- Appears in Collection
- MS-Journal Papers(저널논문)
- Files in This Item
- There are no files associated with this item.
This item is cited by other documents in WoS
| ⊙ Detail Information in WoSⓡ | Click to see |  |
| ⊙ Cited 41 items in WoS | Click to see citing articles in |  |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.