Morphology transitions of deformation-induced thin-plate martensite in Fe-Ni-C alloys
Journal Article
·
· Acta Materialia
- Academia Sinica, Shenyang (China)
- Ecole des Mines, Nancy (France). Lab. de Science et Genie des Materiaux Metalliques
The morphology and crystallography of deformation-induced martensites formed during isothermal tensile tests in Fe-30Ni-0.34C and Fe-25Ni-0.66C alloys were investigated by means of optical, transmission electron and scanning electron microscopy. Transitions in morphology from thin plate to coupled plate, to lenticular coupled-plate martensite and from thin plate to lenticular to compact martensite have been observed with increasing deformation. Stress favors the growth of martensite when concurrent plastic strain allows accommodation of macroscopic transformation strains and the change of the Bain strain accommodation mechanism. Mobile dislocations and emission dislocations are directly related to the change of the Bain strain accommodation mechanism from twinning to slip.
- OSTI ID:
- 651110
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 13 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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