Abstract
Single pure crystal cooper is usually found to be ductile both in previous simulations and experiments. In this paper, we applied the molecular dynamics simulation to investigate the influence of twinning spacing distance, applied strain rate and model size on fracture behaviour in twinned copper at low temperature. It was observed a brittle-to-ductile transition is correlated with those parameters, when change to below some critical values. The fracture transition process involved the competing mechanism between the homogeneous (or heterogeneous) partial dislocation nucleation close to the crack tip and atoms de-bonding at the crack tip. The twinning and dislocation activities are responsible for the ductile fracture in twinned cooper.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
T. Zhu and H. Gao, “Plastic deformation mechanism in nanotwinned metals: An insight from molecular dynamics and mechanistic modeling,” Scripta Materialia, 66 (2012), 843–848.
K. Lu, L. Lu, and S. Suresh, “Strengthening materials by engineering coherent internal boundaries at the nanoscale,” Science, 324 (2009), 349–352.
L. Lu, X. Chen, X. Huang, and K. Lu, “Revealing the maximum strength in nanotwinned copper,” Science, 323 (2009), 607–610.
Z. X. Wu, Y. W. Zhang, and D. J. Srolovitz, “Deformation mechanisms, length scales and optimizing the mechanical properties of nanotwinned metals,” Acta Materialia, 59 (2011), 6890–6900.
C. Deng and F. Sansoz, “Near-Ideal Strength in Gold Nanowires Achieved through Microstructural Design,” ACS Nano, 3 (2009), 3001–3008.
Y. Zhang and H. Huang, “Do twin boundaries always strengthen metal nanowires?,” Nanoscale Research Letters, 4 (2009), 34–38.
Z. X. Wu, Y. W. Zhang, and D. J. Srolovitz, “Dislocation-twin interaction mechanisms for ultrahigh strength and ductility in nanotwinned metals,” Acta Materialia, 57 (2009), 4508–4518.
Z. X. Wu, Y. W. Zhang, M. H. Jhon, J. R. Greer, and D. J. Srolovitz, “Nanostructure and surface effects on yield in Cu nanowires,” Acta Materialia, 61 (2013), 1831–1842.
M. Sun, R. Cao, F. Xiao, and C. Deng, “Surface and interface controlled yielding and plasticity in fivefold twinned Ag nanowires,” Computational Materials Science, 79 (2013), 289–295.
C. Deng and F. Sansoz, “Fundamental differences in the plasticity of periodically twinned nanowires in Au, Ag, Al, Cu, Pb and Ni,” Acta Materialia, 57 (2009), 6090–6101.
C. Deng and F. Sansoz, “Size-dependent yield stress in twinned gold nanowires mediated by site-specific surface dislocation emission,” Applied Physics Letters, 95 (2009), 091914.
Y. Cheng, Z. H. Jin, Y. W. Zhang, and H. Gao, “On intrinsic brittleness and ductility of intergranular fracture along symmetrical tilt grain boundaries in copper,” Acta Materialia, 58 (2010), 2293–2299.
Y. Lu, J. Song, J. Y. Huang, and J. Lou, “Fracture of Sub-20nm Ultrathin Gold Nanowires,” Advanced Functional Materials, 21 (2011), 3982–3989.
Y.-F. Guo *, C.-Y. Wang, and Y.-S. Wang, “The effect of stacking faults or twin formation on crack propagation in bcc iron,” Philosophical Magazine Letters, 84 (2004), 763–770.
D. Jang, X. Li, H. Gao, and J. R. Greer, “Deformation mechanisms in nanotwinned metal nanopillars,” Nat Nano, vol. advance online publication, 2012.
J. Wang, F. Sansoz, J. Huang, Y. Liu, S. Sun, Z. Zhang, and S. X. Mao, “Near-ideal theoretical strength in gold nanowires containing angstrom scale twins,” Nat Commun, 4 (2013), 1742.
H. Zhou and S. Qu, “The effect of nanoscale twin boundaries on fracture toughness in nanocrystalline Ni,” Nanotechnology, 21 (2010), 035706.
M. Parrinello and A. Rahman, “Polymorphic transitions in single crystals: A new molecular dynamics method,” Journal of Applied Physics, 52 (1981), 7182–7190.
D. Farkas and B. Hyde, “Improving the ductility of nanocrystalline bcc metals,” Nano Letters, 5 (2005), 2403–2407.
A. Stukowski, “Visualization and analysis of atomistic simulation data with OVITO-the Open Visualization Tool,” Modelling and Simulation in Materials Science and Engineering, 18 (2010), 015012.
P. Gumbsch, J. Riedle, A. Hartmaier, and H. F. Fischmeister, “Controlling factors for the brittle-to-ductile transition in tungsten single crystals,” Science, 282 (1998), 1293–1295.
M. Tanaka, E. Tarleton, and S. G. Roberts, “The brittle-ductile transition in single-crystal iron,” Acta Materialia, 56 (2008), 5123–5129.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2014 TMS (The Minerals, Metals & Materials Society)
About this paper
Cite this paper
Pei, L., Lu, C., Tieu, K., Zhao, X., Cheng, K., Zhang, L. (2014). Influence Factors for Brittle-to-Ductile Transition in Twinned Copper. In: TMS 2014: 143rd Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48237-8_59
Download citation
DOI: https://doi.org/10.1007/978-3-319-48237-8_59
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48593-5
Online ISBN: 978-3-319-48237-8
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)