Abstract
Twinning is an important deformation mode in hexagonal metals to accommodate deformation along the c-axis. It differs from slip in that it accommodates shear by means of crystallographic reorientation of domains within the grain. Such reorientation has been shown to be reversible (detwinning) in magnesium alloy aggregates. In this paper we perform in-situ neutron diffraction reversal experiments on high-purity Zr at room temperature and liquid nitrogen temperature, and follow the evolution of twin fraction. The experiments were motivated by previous studies done on clock-rolled Zr, subjected to deformation history changes (direction and temperature), in the quasi-static regime, for temperatures ranging from 76 K to 450 K. We demonstrate here for the first time that detwinning of \(\left\{ {10\overline 1 2} \right\}\left\langle {10\overline 1 \overline 1 } \right\rangle \) tensile twins is favored over the activation of a different twin variant in grains of high-purity polycrystalline Zr. A visco-plastic self-consistent (VPSC) model developed previously, which includes combined slip and twin deformation, was used here to simulate the reversal behavior of the material and to interpret the experimental results in terms of slip and twinning activities.
Similar content being viewed by others
References
Pochettino AA, Gannio N, Vial Edwards C et al (1992) Texture and pyramidal slip in Ti, Zr and their alloys. Scr Metall Mater 27:1859–1863. doi:10.1016/0956-716X(92)90033-B.
Bingert JF, Mason TA, Kaschner GC et al (2002) Deformation twinning in polycrystalline Zr: insights from electron backscattered diffraction characterization. Metall Mater Trans A 33A:955–963.
Fundenberger JJ, Philippe MJ, Esling C (1990) Mechanical twinning at high temperatures in some hexagonal alloys. Scr Metall Mater 24:1215–1220. doi:10.1016/0956-716X(90)90330-J.
Kaschner GC, Gray GT III (2000) The influence of crystallographic texture and interstitial impurities on the mechanical behavior of Zirconium. Metall Mater Trans A 31A:1997–2003. doi:10.1007/s11661-000-0227-7.
McCabe RJ, Cerreta EK, Misra A et al (2006) Effects of texture, temperature and strain on the deformation modes of zirconium. Philos Mag 8623:3595–3611. doi:10.1080/14786430600684500.
Kaschner GC, Bingert JF, Liu C et al (2001) Mechanical response of zirconium—II. Experimental and finite element analysis of bent beams. Acta Mater 49:3097–3108. doi:10.1016/S1359-6454(01)00191-4.
McCabe RJ, Proust G, Cerreta EK et al (2008) Quantitative analysis of deformation twinning in zirconium. Int J Plast. doi:10.1016/j.iplas.2008.03.010
Proust G, Tomé CN, Kaschner GC (2007) Modeling texture, twinning and hardening evolution during deformation of hexagonal materials. Acta Mater 55:2137–2148. doi:10.1016/j.actamat.2006.11.017.
Beyerlein IJ, Tomé CN (2008) A dislocation-based constitutive law for pure Zr including temperature effects. Int J Plast 24:867–895. doi:10.1016/j.ijplas.2007.07.017.
Kaschner GC, Tome CN, Beyerlein IJ et al (2006) Role of twinning in the hardening response of zirconium during temperature reloads. Acta Mater 54:2887–2896. doi:10.1016/j.actamat.2006.02.036.
Jain A, Agnew SR (2006) Effect of twinning on the mechanical behavior of a magnesium alloy sheet during strain path changes. In: Luo AA, Neelameggham N, Beals R (eds) Magnesium technology. TMS, Warrendale, PA, p 219.
Brown DW, Jain A, Agnew SR et al (2007) Twinning and detwinning during cyclic deformation of Mg alloy AZ31B. Mater Sci Forum 539–5434:3407.
Lou XY, Li M, Boger RK et al (2007) Hardening evolution of AZ31B Mg sheet. Int J Plast 231:44. doi:10.1016/j.ijplas.2006.03.005.
Partridge PG (1965) Cyclic twinning in fatigued hexagonal close-packed metals. Philos Mag 12:1043–1054. doi:10.1080/14786436508228133.
Rangaswamy P, Bourke MAM, Brown DW et al (2002) A study of twinning in zirconium using neutron diffraction and polycrystalline modeling. Metall Mater Trans A 33A:757–763.
Bourke MAM, Dunand D, Ustundag E (2002) SMARTS—a spectrometer for strain measurement in engineering materials. Appl Phys A A74:S1707. doi:10.1007/s003390201747.
Brown DW, Agnew SR, Bourke MAM et al (2005) Internal strain and texture evolution during deformation twinning in magnesium. Mater Sci Eng A 3991–2:1. doi:10.1016/j.msea.2005.02.016.
Bourke MAM, Goldstone JA, Holden TM (1992) Residual stress measurement using the pulsed neutron source at LANSCE. In: Hutchings, MT, Krawitz, AD (eds) Measurement of residual and applied stress using neutron diffraction. Kluwer, The Netherlands, pp 369–382
Proust G, Tomé CN, Jain A et al (2008) Modeling the effect of twinning and detwinning during strain-path changes of magnesium alloy AZ31. Int J Plast. doi:10.1016/j.iplas.2008.05.005
Acknowledgments
Work at LANL was supported under Office of Basic Energy Sciences Project FWP 06SCPE401 and U.S. DOE Contract No. W-7405-ENG-36.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Proust, G., Kaschner, G.C., Beyerlein, I.J. et al. Detwinning of High-Purity Zirconium: In-Situ Neutron Diffraction Experiments. Exp Mech 50, 125–133 (2010). https://doi.org/10.1007/s11340-008-9213-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11340-008-9213-6