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Microscopic mechanisms contributing to the synchronous improvement of strength and plasticity (SISP) for TWIP copper alloys.


ABSTRACT: In this study, the concept of "twinning induced plasticity (TWIP) alloys" is broadened, and the underlying intrinsic microscopic mechanisms of the general TWIP effect are intensively explored. For the first aspect, "TWIP copper alloys" was proposed following the concept of "TWIP steels", as they share essentially the same strengthening and toughening mechanisms. For the second aspect, three intrinsic features of twinning: i.e. "dynamic development", "planarity", as well as "orientation selectivity" were derived from the detailed exploration of the deformation behavior in TWIP copper alloys. These features can be considered the microscopic essences of the general "TWIP effect". Moreover, the effective cooperation between deformation twinning and dislocation slipping in TWIP copper alloys leads to a desirable tendency: the synchronous improvement of strength and plasticity (SISP). This breakthrough against the traditional trade-off relationship, achieved by the general "TWIP effect", may provide useful strategies for designing high-performance engineering materials.

SUBMITTER: Liu R 

PROVIDER: S-EPMC4381273 | biostudies-other | 2015

REPOSITORIES: biostudies-other

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