| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498209 | Scripta Materialia | 2015 | 4 Pages |
Abstract
We present the first report of a tungsten-free cobalt-based superalloy having a composition Co–10Al–5Mo–2Nb. The alloy is strengthened by cuboidal precipitates of metastable Co3(Al,Mo,Nb) distributed throughout the microstructure. The precipitates are coherent with the face-centred cubic γ-Co matrix and possess ordered L12 structure. The microstructure is identical to the popular γ–γ’ type nickel-based superalloys and that of recently reported Co–Al–W-based alloys. Being tungsten free, the reported alloy has higher specific proof stress compared to existing cobalt-based superalloys.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S.K. Makineni, B. Nithin, K. Chattopadhyay,