| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1499290 | Scripta Materialia | 2012 | 4 Pages |
Abstract
Deformation microstructures of bulk ultrafine-grained austenitic AISI 304L stainless steels were analyzed by electron backscatter diffraction. Samples with grain sizes below 500 nm showed transition from grain-scale deformation to the collective phenomenon of shear banding. This was assisted by strain-induced grain rotation and coalescence. This phenomenon was suppressed in samples with a bimodal grain size distribution (maxima at ∼650 and ∼1400 nm) due to deformation-induced martensite formation, yielding high tensile strength and ductility (1348 MPa ultimate tensile strength at 0.36 max. true strain).
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
B. Ravi Kumar, Dierk Raabe,