Ductile-Brittle Behavior along Crack Front and T-Stress

Alena Uhnáková; Anna Machová; Petr Hora

doi:10.4028/www.scientific.net/KEM.465.69

Paper Titles

On the Development of Physically Based Life Prediction Models in the Thermo Mechanical Fatigue of Ni-Base Superalloys
p.47

The Role of Grain Orientation and Martensitic Transformation during Propagation of Short Fatigue Cracks in Austenitic Stainless Steel
p.55

Transformation Paths in Transition-Metal Disilicides
p.61

Modeling of (121) Twin Boundaries in 2H Martensite
p.65

Ductile-Brittle Behavior along Crack Front and T-Stress
p.69

First Principles Study of Ideal Composites Reinforced by Coherent Nano-Fibres
p.73

Influence of Dislocations on the Spatial Variation of Microstructure in Martensites
p.77

Stabilizing Effect of (100) Compound Twinning in NiTi Martensite
p.81

Elastic Parameters of Various Rafted Structures of Model Ni-Base Alloys
p.85

HomeKey Engineering MaterialsKey Engineering Materials Vol. 465Ductile-Brittle Behavior along Crack Front and...

Ductile-Brittle Behavior along Crack Front and T-Stress

Abstract:

We present new results of molecular dynamic (MD) simulations in 3D bcc iron crystals with embedded central through crack (001)[110] of Griffith type loaded in mode I. Two different sample geometries of the same crystallographic orientation were tested with negative and positive values of the T-stress, which change the ductile-brittle behavior along the crack front in 3D. This phenomenon is explained in the framework of stress analysis, both on the continuum and atomistic level.

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Key Engineering Materials (Volume 465)

Pages:

69-72

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.465.69

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Online since:

January 2011

Authors:

Alena Uhnáková, Anna Machová, Petr Hora

Keywords:

Twinning, BCC Iron, Crack Growth, Dislocation Emission

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References

[1] V. Vitek: Scripta Met. Vol. 4 (1970), p.725.

Google Scholar

[2] A. Spielmannová, A. Machová and P. Hora: Comput. Mater. Sci. Vol. 48 (2010), p.296.

Google Scholar

[3] J. Prahl, A. Machová, M. Landa, P. Haušild, M. Karlík, A. Spielmannová, M. Clavel and P. Haghi-Ashtiani: Mater. Sci. Eng. A Vol. 462 (2007), p.178.

DOI: 10.1016/j.msea.2006.02.456

Google Scholar

[4] K. Jagannadham, R.W. Armstrong and J.P. Hirth: Mater. Sci. Eng. A Vol. 113 (1989), p.339.

Google Scholar

[5] G.E. Beltz and A. Machová: Scripta Mater. Vol. 50 (2004), p.483.

Google Scholar

[6] T. Fett: A compendium of T-stress solutions (Forschungscentrum Karlsruhe GmbH, 1998).

Google Scholar

[7] G.J. Ackland, D.J. Bacon, A.F. Calder and T. Harry: Phil. Mag. A Vol. 75 (1997), p.713.

Google Scholar

[8] Y. Murakami: Stress intensity factor handbook, Vol. 1 (Pergamon, Oxford 1987), p.68.

Google Scholar

[9] A. Spielmannová and A. Machová, in: Proceedings of 17th European Conference on Fracture [CD-ROM], edited by J. Pokluda and P. Lukáš, VUTIUM, Brno (2008), p.217.

Google Scholar