| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1578315 | Materials Science and Engineering: A | 2011 | 6 Pages |
Abstract
We have succeeded the fabrication of Ni-free Co–29Cr–6Mo alloys with ultrafine-grained (UFG) microstructures via conventional hot forging process with the reduction up to 83.4% (true strain of 1.8). Grain refinement to submicron order is an effective method for improvement of strength and athermal martensite ɛ phase formed during quenching seems to determine the ductility of this alloy system.
► Ultrafine-grained Co–29Cr–6Mo exhibits significantly high strength and low ductility. ► Factor for elongation of UFGed alloy is not related to plastic instability. ► The martensite ɛ phase inside the grains causes for premature fracture.
Keywords
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Kenta Yamanaka, Manami Mori, Akihiko Chiba,