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Deformation of single crystal hadfield steel by twinning and slip

Publication ,  Journal Article
Karaman, I; Sehitoglu, H; Gall, K; Chumlyakov, YI; Maier, HJ
Published in: Acta Materialia
April 2, 2000

The stress-strain behavior of Hadfield steel (Fe, 12.34 Mn, 1.03 C, in wt%) single crystals was studied for selected crystallographic orientations ([1̄11], [001] and [1̄23]) under tension and compression. The overall stress-strain response was strongly dependent on the crystallographic orientation and applied stress direction. Transmission electron microscopy and in situ optical microscopy demonstrated that twinning is the dominant deformation mechanism in [1̄11] crystals subjected to tension, and [001] crystals subjected to compression at the onset of inelastic deformation. In the orientations that experience twinning, the activation of multiple twinning systems produces a higher strain-hardening coefficient than observed in typical f.c.c. alloys. Based on these experimental observations, a model is presented that predicts the orientation and stress direction effects on the critical stress for initiating twinning. The model incorporates the role of local pile-up stresses, stacking fault energy, the influence of the applied stress on the separation of partial dislocations, and the increase in the friction stress due to a high solute concentration. On the other hand, multiple slip was determined to be the dominant deformation mechanism in [1̄11] crystals subjected to compression, and [001] crystals deformed under tension. Furthermore, the [1̄23] crystals experience single slip in both tension and compression with planar type dislocations. Using electron back-scattered diffraction patterns, macroscopic shear bands (MSBs) were identified with a misorientation of 9° in the compressed [1̄11] single crystals at strains as low as 1%.

Duke Scholars

Published In

Acta Materialia

DOI

ISSN

1359-6454

Publication Date

April 2, 2000

Volume

48

Issue

6

Start / End Page

1345 / 1359

Related Subject Headings

  • Materials
  • 5104 Condensed matter physics
  • 4017 Mechanical engineering
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0204 Condensed Matter Physics
 

Citation

APA
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Karaman, I., Sehitoglu, H., Gall, K., Chumlyakov, Y. I., & Maier, H. J. (2000). Deformation of single crystal hadfield steel by twinning and slip. Acta Materialia, 48(6), 1345–1359. https://doi.org/10.1016/S1359-6454(99)00383-3
Karaman, I., H. Sehitoglu, K. Gall, Y. I. Chumlyakov, and H. J. Maier. “Deformation of single crystal hadfield steel by twinning and slip.” Acta Materialia 48, no. 6 (April 2, 2000): 1345–59. https://doi.org/10.1016/S1359-6454(99)00383-3.
Karaman I, Sehitoglu H, Gall K, Chumlyakov YI, Maier HJ. Deformation of single crystal hadfield steel by twinning and slip. Acta Materialia. 2000 Apr 2;48(6):1345–59.
Karaman, I., et al. “Deformation of single crystal hadfield steel by twinning and slip.” Acta Materialia, vol. 48, no. 6, Apr. 2000, pp. 1345–59. Scopus, doi:10.1016/S1359-6454(99)00383-3.
Karaman I, Sehitoglu H, Gall K, Chumlyakov YI, Maier HJ. Deformation of single crystal hadfield steel by twinning and slip. Acta Materialia. 2000 Apr 2;48(6):1345–1359.
Journal cover image

Published In

Acta Materialia

DOI

ISSN

1359-6454

Publication Date

April 2, 2000

Volume

48

Issue

6

Start / End Page

1345 / 1359

Related Subject Headings

  • Materials
  • 5104 Condensed matter physics
  • 4017 Mechanical engineering
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
  • 0204 Condensed Matter Physics