Abstract
The microscale deformation of an Al-Mg alloy with a bimodal grain size distribution, consisting of coarse grains (CGs) and ultrafine grains (UFGs) is studied through finite element methods. Procedurally generated models are created to characterize the behavior of this micro structure at different scales. The mechanical response of individual grains is represented through crystal plasticity laws, which include accommodations for solute and grain size strengthening effects. These effects are quantified through multiscale models allowing for experimental calibration. Additionally, the behavior of grain boundaries is included through cohesive interface models. Using these techniques, grain scale deformation is characterized, load distribution between the two phases is examined, and the roles of crystal anisotropy and interface accommodation are considered.
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
Lee, Z., Witkin, D. B., Radmilovic, V., Lavernia, E. J., and Nutt, S. R. Bimodal micro structure and deformation of cryomilled bulk nanocrystalline Al-7.5Mg alloy. Mater. Sci. Eng. A 410–411, 462–467 (2005).
Witkin, D., Lee, Z., Rodriguez, R., Nutt, S., and Lavernia, E. Al-Mg alloy engineered with bimodal grain size for high strength and increased ductility. Scr. Mater. 49, 297–302 (2003).
Han, B. Q., Ye, J., Tang, F., Schoenung, J., and Lavernia, E. J. Processing and behavior of nanostructured metallic alloys and composites by cryomilling. J. Mater. Sci. 42, 1660–1672 (2007).
Topping, T. D., Ahn, B., Li, Y., Nutt, S. R., and Lavernia, E. J. Influence of Process Parameters on the Mechanical Behavior of an Ultrafine-Grained Al Alloy. Metall. Mater. Trans. A 43, 505–519 (2011).
Witkin, D. B., and Lavernia, E. J. Synthesis and mechanical behavior of nanostructured materials via cryomilling. Prog. Mater. Sci. 51, 1–60(2006).
Youssef, K. M., Scattergood, R. O., Murty, K. L., and Koch, C. C. Nanocrystalline Al-Mg alloy with ultrahigh strength and good ductility. Scr. Mater. 54, 251–256 (2006).
Magee, A., Ladani, L., Topping, T. D., and Lavernia, E. J. Effects of tensile test parameters on the mechanical properties of a bimodal Al-Mg alloy. Acta Mater. 60, 5838–5849 (2012).
Ye, R. Q., Han, B. Q., and Lavernia, E. J. Simulation of Deformation and Failure Process in Bimodal Al Alloys. Metall. Mater. Trans. A36, 1833–1840 (2005).
Nelson, S., Ladani, L., Topping, T., and Lavernia, E. Fatigue and monotonie loading crack nucleation and propagation in bimodal grain size aluminum alloy. Acta Mater. 59, 3550–3570 (2011).
Wei, Y., and Anand, L. Grain-boundary sliding and separation in polycrystalline metals: application to nanocrystalline fcc metals. J. Mech. Phys. Solids 52, 2587–2616 (2004).
Shaban, A., Ma, A., and Hartmaier, A. Polycrystalline material deformation modeling with grain boundary sliding and damage accumulation. ECF18, Dresden2010 1–8 (2013).
Bower, A. F., and Wininger, E. A two-dimensional finite element method for simulating the constitutive response and micro structure of polycrystals during high temperature plastic deformation. J. Mech. Phys. Solids 52, 1289–1317 (2004).
Fu, H.-H., Benson, D. J., and André Meyers, M. Computational description of nanocrystalline deformation based on crystal plasticity. Acta Mater. 52, 4413–4425 (2004).
Schwaiger, R., Moser, B., Dao, M., Chollacoop, N., and Suresh, S. Some critical experiments on the strain-rate sensitivity of nanocrystalline nickel. Acta Mater. 51, 5159–5172 (2003).
Liu, Y., Zhou, J., and Hui, D. A strain-gradient plasticity theory of bimodal nanocrystalline materials with composite structure. Compos. Part B Eng. 43, 249–254 (2012).
Warner, D. H., Sansoz, F., and Molinari, J. F. Atomistic based continuum investigation of plastic deformation in nanocrystalline copper. Int. J. Plast. 22, 754–774 (2006).
Wu, B., Liang, L., Ma, H., and Wei, Y. A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals. Comput. Mater. Sci. 57, 2–7 (2012).
Magee, A. C., and Ladani, L. Simulation of Grain Boundary Plasticity, Crack Initiation, and Crack Propagation in an Al-Mg Alloy with Bimodal Grain Size. Submitt. to Eur. J. Mech.-A/Solids (2014).
Marin, E. On the formulation of a crystal plasticity model. (2006).
Pouillier, E., Gourgues, A.-F., Tanguy, D., and Busso, E. P. A study of intergranular fracture in an aluminium alloy due to hydrogen embrittlement. Int. J. Plast. 34, 139–153 (2012).
ASM International. Atlas of stress-strain curves. (ASM International, 2002).
Kaufman, J. G. Properties of Aluminum Alloys. (ASM International, 1999).
Simmons, G., and Wang, H. Single crystal elastic constants and calculated aggregate properties. (MIT Press, 1965).
Topping, T. D., Hu, T., Manigandan, K., Srivatsan, T. S., and Lavernia, E. J. Quasi-static deformation and final fracture behaviour of aluminium alloy 5083: influence of cryomilling. Philos. Mag. 93, 899–921 (2013).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Magee, A.C., Ladani, L. (2015). Deformation and Failure of an Al-Mg Alloy Investigated Through Multiscale Microstructural Models. In: Hyland, M. (eds) Light Metals 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48248-4_42
Download citation
DOI: https://doi.org/10.1007/978-3-319-48248-4_42
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48610-9
Online ISBN: 978-3-319-48248-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)