Abstract
The low stacking fault energy and high carbon content in Hadfield steel make twinning the basic deformation mechanism from the onset of plastic deformation in [111] and [011] oriented single crystals in tension at T = 77-300 K. Alloying with aluminium (2.7 Al in wt.%) results in an increase of stacking fault energy from 0.03 J m2 to 0.05 J m-2 and moves twinning to higher degrees of deformation (ϵpl > 15%). In aluminium-free [1-23] crystals twinning starts after 20% strain. For [123], [001] orientations, aluminiumadditions change the dislocation arrangement from a uniform distribution to a planar dislocation arrangment and also suppress twinning. Intersections of dislocation pile-ups were found to be the governing factor for hardening in the aluminium-Alloyed [001] crystals.
Original language | English (US) |
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Pages (from-to) | 144-149 |
Number of pages | 6 |
Journal | Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques |
Volume | 98 |
Issue number | 2 |
State | Published - Feb 2007 |
Keywords
- Hadfield steel
- Microstructure
- Single crystal
- Stacking fault energy
- Twinning
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry