Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10620151 | Acta Materialia | 2013 | 9 Pages |
Abstract
Deformation behavior in a Fe-31.2 Pd (at.%) single crystal, which exhibits a second order-like face-centered cubic (fcc)-face-centered tetragonal martensitic transformation at 230Â K, is investigated by compressive tests in the [0Â 0Â 1]P direction (subscript P represents the parent phase). As a result, a large reversible strain of 6.5% with quite small stress hysteresis is obtained at 240Â K under a stress of 250Â MPa. The large elastic-like strain is essentially attributed to continuous change in the lattice parameter of a single martensite variant under stress. The yield point appears at 285Â MPa, at which the strain is 7.3%, and the residual strain does not recover by heating to 300Â K. The main reason for the residual strain is the occurrence of {1Â 1Â 1} mechanical twinning. The critical resolved shear stress of a Fe-31.2 Pd (at.%) single crystal is close to the ideal value.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Fei Xiao, Takashi Fukuda, Tomoyuki Kakeshita,