Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 42A, Issue 11, Pages 3344-3348Publisher
SPRINGER
DOI: 10.1007/s11661-011-0755-3
Keywords
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Funding
- Engineering and Physical Sciences Research Council
- Corus plc. (now Tata Steel)
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Extremely thin plates of bainitic ferrite can now routinely be induced in steels by heat-treatment at low homologous temperatures. Given the atomic mechanism by which the transformation occurs, morphology should be dominated by the minimization of strain energy due to the displacements necessary to accomplish the change in crystal structure when austenite decomposes into bainite. Experiments were conducted using atomic force microscopy in an attempt to characterize these displacements, with a surprising outcome that the shear strain is much larger than associated with conventional, coarser bainitic structures. It appears that this might explain why the plates of bainitic ferrite tend to be slender in this new class of nanostructured alloys.
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