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Volumn 25, Issue 6, 2009, Pages 1107-1127

In situ neutron diffraction investigation of deformation twinning and pseudoelastic-like behaviour of extruded AZ31 magnesium alloy

Author keywords

Deformation mechanism; Magnesium; Neutron diffraction; Pseudoelasticity; Twinning untwinning

Indexed keywords

ALLOYS; DEFORMATION; MAGNESIUM; MAGNESIUM ALLOYS; MAGNESIUM PRINTING PLATES; NEUTRON DIFFRACTION; NEUTRONS; STRAIN; UNLOADING;

EID: 63049139003     PISSN: 07496419     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ijplas.2008.08.002     Document Type: Article
Times cited : (192)

References (61)
  • 1
    • 0037437276 scopus 로고    scopus 로고
    • Study of slip mechanisms in a magnesium alloy by neutron diffraction and modelling
    • Agnew S.R., Tomé C.N., Brown D.W., Holden T.M., and Vogel S.C. Study of slip mechanisms in a magnesium alloy by neutron diffraction and modelling. Scripta Materialia 48 8 (2003) 1003-1008
    • (2003) Scripta Materialia , vol.48 , Issue.8 , pp. 1003-1008
    • Agnew, S.R.1    Tomé, C.N.2    Brown, D.W.3    Holden, T.M.4    Vogel, S.C.5
  • 2
    • 33748997932 scopus 로고    scopus 로고
    • Validating a polycrystal model for the elastoplastic response of magnesium alloy AZ31 using in situ neutron diffraction
    • Agnew S.R., Brown D.W., and Tomé C.N. Validating a polycrystal model for the elastoplastic response of magnesium alloy AZ31 using in situ neutron diffraction. Acta Materialia 54 18 (2006) 4841-4852
    • (2006) Acta Materialia , vol.54 , Issue.18 , pp. 4841-4852
    • Agnew, S.R.1    Brown, D.W.2    Tomé, C.N.3
  • 3
    • 18844407097 scopus 로고    scopus 로고
    • Texture evolution of five wrought magnesium alloys during route A equal channel angular extrusion: experiments and simulations
    • Agnew S.R., Mehrotra P., Lillo T.M., Stoica G.M., and Liaw P.K. Texture evolution of five wrought magnesium alloys during route A equal channel angular extrusion: experiments and simulations. Acta Materialia 53 1-2 (2005) 3135-3146
    • (2005) Acta Materialia , vol.53 , Issue.1-2 , pp. 3135-3146
    • Agnew, S.R.1    Mehrotra, P.2    Lillo, T.M.3    Stoica, G.M.4    Liaw, P.K.5
  • 4
    • 12344256118 scopus 로고    scopus 로고
    • Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B
    • Agnew S.R., and Duygulu O. Plastic anisotropy and the role of non-basal slip in magnesium alloy AZ31B. International Journal of Plasticity 21 (2005) 1161-1193
    • (2005) International Journal of Plasticity , vol.21 , pp. 1161-1193
    • Agnew, S.R.1    Duygulu, O.2
  • 5
    • 0035803001 scopus 로고    scopus 로고
    • Application of texture simulation to understanding mechanical behaviour of Mg and solid solution alloy containing Li or Y
    • Agnew S.R., Yoo M.H., and Tomé C.N. Application of texture simulation to understanding mechanical behaviour of Mg and solid solution alloy containing Li or Y. Acta Materialia 49 20 (2001) 4277-4289
    • (2001) Acta Materialia , vol.49 , Issue.20 , pp. 4277-4289
    • Agnew, S.R.1    Yoo, M.H.2    Tomé, C.N.3
  • 6
    • 4644370586 scopus 로고    scopus 로고
    • Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn
    • Barnett M.R., Keshavarz Z., Beer A.G., and Atwell D. Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn. Acta Materialia 52 (2004) 5093-5103
    • (2004) Acta Materialia , vol.52 , pp. 5093-5103
    • Barnett, M.R.1    Keshavarz, Z.2    Beer, A.G.3    Atwell, D.4
  • 7
    • 34248531236 scopus 로고    scopus 로고
    • Twinning and the ductility of magnesium alloys: Part I: "tension" twins
    • Barnett M.R. Twinning and the ductility of magnesium alloys: Part I: "tension" twins. Materials Science and Engineering A 1-2 464 (2007) 1-7
    • (2007) Materials Science and Engineering A , vol.1-2 , Issue.464 , pp. 1-7
    • Barnett, M.R.1
  • 8
    • 34248582379 scopus 로고    scopus 로고
    • Twinning and the ductility of magnesium alloys: Part II. "Contraction" twins
    • Barnett M.R. Twinning and the ductility of magnesium alloys: Part II. "Contraction" twins. Materials Science and Engineering A 464 1-2 (2007) 8-16
    • (2007) Materials Science and Engineering A , vol.464 , Issue.1-2 , pp. 8-16
    • Barnett, M.R.1
  • 9
    • 0001469638 scopus 로고    scopus 로고
    • Transformation of slip dislocations during twinning of copper-aluminium alloy crystals
    • Basinski Z.S., and Szczerba M.S. Transformation of slip dislocations during twinning of copper-aluminium alloy crystals. Devue de Metallurgie. Cahiers D'Inforamtions Techniques 94 9 (1997) 1037-1044
    • (1997) Devue de Metallurgie. Cahiers D'Inforamtions Techniques , vol.94 , Issue.9 , pp. 1037-1044
    • Basinski, Z.S.1    Szczerba, M.S.2
  • 10
    • 33847318635 scopus 로고    scopus 로고
    • The texture and anisotropy of magnesium-zinc-rare earth alloy sheets
    • Bohlen J., Nurnberg M.R., Senn J.W., Letzig D., and Agnew S.R. The texture and anisotropy of magnesium-zinc-rare earth alloy sheets. Acta Materialia 55 6 (2007) 2101-2112
    • (2007) Acta Materialia , vol.55 , Issue.6 , pp. 2101-2112
    • Bohlen, J.1    Nurnberg, M.R.2    Senn, J.W.3    Letzig, D.4    Agnew, S.R.5
  • 13
    • 3242684298 scopus 로고    scopus 로고
    • Residual stress measurements in a zircaloy-4 weld by neutron diffraction
    • Carr D.G., Ripley M.I., Holden T.M., Brown D.W., and Vogel S.C. Residual stress measurements in a zircaloy-4 weld by neutron diffraction. Acta Materialia 52 14 (2004) 4083-4091
    • (2004) Acta Materialia , vol.52 , Issue.14 , pp. 4083-4091
    • Carr, D.G.1    Ripley, M.I.2    Holden, T.M.3    Brown, D.W.4    Vogel, S.C.5
  • 14
    • 0344496883 scopus 로고    scopus 로고
    • Pseudoelastic behaviour of cast magnesium AZ91 alloy under cyclic loading-unloading
    • Cáceres C.H., Sumitomo T., and Veidt M. Pseudoelastic behaviour of cast magnesium AZ91 alloy under cyclic loading-unloading. Acta Materialia 51 20 (2003) 6211-6218
    • (2003) Acta Materialia , vol.51 , Issue.20 , pp. 6211-6218
    • Cáceres, C.H.1    Sumitomo, T.2    Veidt, M.3
  • 17
    • 44649181531 scopus 로고    scopus 로고
    • Reorientation and stress relaxation due to twinning: modeling and experimental characterization for Mg
    • Clausen B., Tomé C.N., Brown D.W., and Agnew S.R. Reorientation and stress relaxation due to twinning: modeling and experimental characterization for Mg. Acta Materialia 56 (2008) 2456-2468
    • (2008) Acta Materialia , vol.56 , pp. 2456-2468
    • Clausen, B.1    Tomé, C.N.2    Brown, D.W.3    Agnew, S.R.4
  • 18
    • 23144451461 scopus 로고    scopus 로고
    • A comparison between Engin and Engin-X, a new diffractometer optimized for stress measurement
    • Dann J.A., Daymond M.R., James J.A., Santisteban J.R., and Edwards L. A comparison between Engin and Engin-X, a new diffractometer optimized for stress measurement. Physica B: Condensed Matter 350 1-3 (2004) e511-e514
    • (2004) Physica B: Condensed Matter , vol.350 , Issue.1-3
    • Dann, J.A.1    Daymond, M.R.2    James, J.A.3    Santisteban, J.R.4    Edwards, L.5
  • 19
    • 63049087281 scopus 로고    scopus 로고
    • Personal communication
    • Daymond, M.R., 2007. Personal communication.
    • (2007)
    • Daymond, M.R.1
  • 20
    • 63049100048 scopus 로고    scopus 로고
    • Insights into deformation mechanisms from in situ diffraction experiments
    • Daymond M.R. Insights into deformation mechanisms from in situ diffraction experiments. Acta Crystallographica A 61 (2005) c32
    • (2005) Acta Crystallographica A , vol.61
    • Daymond, M.R.1
  • 21
    • 0033881992 scopus 로고    scopus 로고
    • Measured and predicted intergranular strains in textured austenitic steel
    • Daymond M.R., Tome C.N., and Bourke M.A.M. Measured and predicted intergranular strains in textured austenitic steel. Acta Materialia 48 (2000) 553-564
    • (2000) Acta Materialia , vol.48 , pp. 553-564
    • Daymond, M.R.1    Tome, C.N.2    Bourke, M.A.M.3
  • 23
    • 63049124596 scopus 로고    scopus 로고
    • PhD Thesis, McMaster University, Ontario, Canada
    • Gharghouri, M.A., 1997. PhD Thesis, McMaster University, Ontario, Canada.
    • (1997)
    • Gharghouri, M.A.1
  • 24
    • 0040034683 scopus 로고    scopus 로고
    • Study of the mechanical properties of Mg-7.7 at.% Al by in situ neutron diffraction
    • Gharghouri M.A., Weatherly C.G., and Embury J.D. Study of the mechanical properties of Mg-7.7 at.% Al by in situ neutron diffraction. Philosophical Magazine A 79 7 (1999) 1671-1695
    • (1999) Philosophical Magazine A , vol.79 , Issue.7 , pp. 1671-1695
    • Gharghouri, M.A.1    Weatherly, C.G.2    Embury, J.D.3
  • 28
    • 34848837319 scopus 로고    scopus 로고
    • Yielding of magnesium: from single crystal to polycrystalline aggregates
    • Graff S., Brocks W., and Steglich D. Yielding of magnesium: from single crystal to polycrystalline aggregates. International Journal of Plasticity 23 12 (2007) 1957-1978
    • (2007) International Journal of Plasticity , vol.23 , Issue.12 , pp. 1957-1978
    • Graff, S.1    Brocks, W.2    Steglich, D.3
  • 30
    • 24944494773 scopus 로고    scopus 로고
    • In situ investigation of twinning behaviour in Mg-3Al-1Zn
    • TMS (The Mineral, Metals and Materials Society)
    • Keshavarz Z., and Barnett M.R. In situ investigation of twinning behaviour in Mg-3Al-1Zn. Magnesium Technology 2005 (2005), TMS (The Mineral, Metals and Materials Society)
    • (2005) Magnesium Technology 2005
    • Keshavarz, Z.1    Barnett, M.R.2
  • 31
    • 33748329514 scopus 로고    scopus 로고
    • EBSD analysis of deformation modes in Mg-3Al-1Zn
    • Keshavarz Z., and Barnett M.R. EBSD analysis of deformation modes in Mg-3Al-1Zn. Scripta Materialia 55 (2006) 915-918
    • (2006) Scripta Materialia , vol.55 , pp. 915-918
    • Keshavarz, Z.1    Barnett, M.R.2
  • 32
    • 23644445039 scopus 로고    scopus 로고
    • Enhanced deformation mechanisms by anisotropic plasticity in polycrystalline Mg alloys at room temperature
    • Koike J. Enhanced deformation mechanisms by anisotropic plasticity in polycrystalline Mg alloys at room temperature. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 36 7 (2005) 1689-1696
    • (2005) Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science , vol.36 , Issue.7 , pp. 1689-1696
    • Koike, J.1
  • 33
    • 0000276744 scopus 로고    scopus 로고
    • Modeling the deformation behaviour of Hadfield steel single and polycrystals due to twinning and slip
    • Karaman I., Sehitoglu H., Beaudoin A.J., Chumlyakov Y.I., Maier H.J., and Tomé C.N. Modeling the deformation behaviour of Hadfield steel single and polycrystals due to twinning and slip. Acta Materialia 48 9 (2000) 2031-2047
    • (2000) Acta Materialia , vol.48 , Issue.9 , pp. 2031-2047
    • Karaman, I.1    Sehitoglu, H.2    Beaudoin, A.J.3    Chumlyakov, Y.I.4    Maier, H.J.5    Tomé, C.N.6
  • 35
    • 0036720542 scopus 로고    scopus 로고
    • The correlation between plastic strain and anisotropy strain in aluminium alloys polycrystals
    • Korsunsky A.M., Daymond M.R., and Wells K.E. The correlation between plastic strain and anisotropy strain in aluminium alloys polycrystals. Material Science and Engineering A 334 (2002) 41-48
    • (2002) Material Science and Engineering A , vol.334 , pp. 41-48
    • Korsunsky, A.M.1    Daymond, M.R.2    Wells, K.E.3
  • 37
    • 38349041939 scopus 로고    scopus 로고
    • Constitutive modelling for anisotropic/asymmetric hardening behaviour of magnesium alloy sheets
    • Lee M.-G., Wagoner R.H., Lee J.K., Chung K., and Kim H.Y. Constitutive modelling for anisotropic/asymmetric hardening behaviour of magnesium alloy sheets. International Journal of Plasticity 24 (2008) 542-582
    • (2008) International Journal of Plasticity , vol.24 , pp. 542-582
    • Lee, M.-G.1    Wagoner, R.H.2    Lee, J.K.3    Chung, K.4    Kim, H.Y.5
  • 40
    • 51949101437 scopus 로고    scopus 로고
    • Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy in situ neutron diffraction and EPSC modelling
    • in press, doi:10.1016/j.msea.2008.07.031
    • Muránsky, O., Carr, D.G., Barnett, M.R., Oliver, E.C., Šittner, P., 2008a. Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy in situ neutron diffraction and EPSC modelling. Materials Science and Engineering A, in press, doi:10.1016/j.msea.2008.07.031.
    • (2008) Materials Science and Engineering A
    • Muránsky, O.1    Carr, D.G.2    Barnett, M.R.3    Oliver, E.C.4    Šittner, P.5
  • 41
    • 45749100884 scopus 로고    scopus 로고
    • In-situ neutron diffraction studies of the pseudoelastic-like behaviur of hydrostatically extruded Mg-Al-Zn alloy
    • Muránsky O., Carr D.G., Šittner P., Oliver E.C., and Dobroň P. In-situ neutron diffraction studies of the pseudoelastic-like behaviur of hydrostatically extruded Mg-Al-Zn alloy. Material Science Forum 571-572 (2008) 107-112
    • (2008) Material Science Forum , vol.571-572 , pp. 107-112
    • Muránsky, O.1    Carr, D.G.2    Šittner, P.3    Oliver, E.C.4    Dobroň, P.5
  • 42
    • 33845981725 scopus 로고    scopus 로고
    • Neutron diffraction study of extruded magnesium during cyclic and elevated temperatures loading
    • Oliver E.C., Daymond M.R., and Withers P.J. Neutron diffraction study of extruded magnesium during cyclic and elevated temperatures loading. Materials Science Forum 490-491 (2005) 257-262
    • (2005) Materials Science Forum , vol.490-491 , pp. 257-262
    • Oliver, E.C.1    Daymond, M.R.2    Withers, P.J.3
  • 43
    • 0033897223 scopus 로고    scopus 로고
    • The generation of intergranular strains in 309H stainless steel under uniaxial loading
    • Pang J.W.L., Holden T.M., Wright J.S., and Mason T.E. The generation of intergranular strains in 309H stainless steel under uniaxial loading. Acta Materialia 48 5 (2000) 1131-1140
    • (2000) Acta Materialia , vol.48 , Issue.5 , pp. 1131-1140
    • Pang, J.W.L.1    Holden, T.M.2    Wright, J.S.3    Mason, T.E.4
  • 44
    • 33847360635 scopus 로고    scopus 로고
    • Modeling texture, twinning and hardening evolution during deformation of hexagonal materials
    • Proust G., Tomé C.N., and Kaschner G.C. Modeling texture, twinning and hardening evolution during deformation of hexagonal materials. Acta Materialia 55 (2007) 2137-2148
    • (2007) Acta Materialia , vol.55 , pp. 2137-2148
    • Proust, G.1    Tomé, C.N.2    Kaschner, G.C.3
  • 45
    • 49749178563 scopus 로고
    • Additional modes of deformation twinning in magnesium
    • Reed-Hill R.E., and Robertson W.D. Additional modes of deformation twinning in magnesium. Acta Metallurgica 5 12 (1957) 717-727
    • (1957) Acta Metallurgica , vol.5 , Issue.12 , pp. 717-727
    • Reed-Hill, R.E.1    Robertson, W.D.2
  • 46
    • 0004123158 scopus 로고
    • Deformation twinning
    • American Institute of Mining, Metallurgical and Petroleum Engineering, Inc, Great Britain, Gainesville Florida
    • Reed-Hill, R.E., 1964. Deformation twinning. In: TMS-AIME Conference, American Institute of Mining, Metallurgical and Petroleum Engineering, Inc., Great Britain, Gainesville Florida.
    • (1964) TMS-AIME Conference
    • Reed-Hill, R.E.1
  • 49
    • 0041743954 scopus 로고    scopus 로고
    • Strain hardening of titanium: role of deformation twinning
    • Salem A.A., Kalidindi S.R., and Doherty R.D. Strain hardening of titanium: role of deformation twinning. Acta Materialia 51 (2003) 4225-4237
    • (2003) Acta Materialia , vol.51 , pp. 4225-4237
    • Salem, A.A.1    Kalidindi, S.R.2    Doherty, R.D.3
  • 50
    • 19844371860 scopus 로고    scopus 로고
    • Strain hardening due to deformation twinning in α-titanium: constitutive relations and crystal-plasticity modelling
    • Salem A.A., Kalidindi S.R., and Semiatin S.L. Strain hardening due to deformation twinning in α-titanium: constitutive relations and crystal-plasticity modelling. Acta Materialia 53 (2005) 3495-3502
    • (2005) Acta Materialia , vol.53 , pp. 3495-3502
    • Salem, A.A.1    Kalidindi, S.R.2    Semiatin, S.L.3
  • 51
    • 0038347289 scopus 로고    scopus 로고
    • A constitutive model for hcp materials deforming by slip and twinning: application of magnesium alloy AZ31B
    • Staroselsky A., and Anand L. A constitutive model for hcp materials deforming by slip and twinning: application of magnesium alloy AZ31B. International Journal of Plasticity 19 (2003) 1843-1864
    • (2003) International Journal of Plasticity , vol.19 , pp. 1843-1864
    • Staroselsky, A.1    Anand, L.2
  • 52
    • 3042778715 scopus 로고    scopus 로고
    • In situ neutron diffraction studies of martensitic transformations in NiTi polycrystals under tension and compression stress
    • Šittner P., Lukáš P., Novák V., Daymond M.R., and Swallowe G.M. In situ neutron diffraction studies of martensitic transformations in NiTi polycrystals under tension and compression stress. Materials Science and Engineering A 378 1-2 (2004) 97-104
    • (2004) Materials Science and Engineering A , vol.378 , Issue.1-2 , pp. 97-104
    • Šittner, P.1    Lukáš, P.2    Novák, V.3    Daymond, M.R.4    Swallowe, G.M.5
  • 53
    • 0035073837 scopus 로고    scopus 로고
    • EXPGUI, a graphical user interface for GSAS
    • Toby B.H. EXPGUI, a graphical user interface for GSAS. Journal of Applied Crystallography 34 (2001) 210-213
    • (2001) Journal of Applied Crystallography , vol.34 , pp. 210-213
    • Toby, B.H.1
  • 54
    • 0026259651 scopus 로고
    • A model for texture development dominated by deformation twinning: application to zirconium alloys
    • Tomé C.N., Lebensohn R.A., and Kocks U.F. A model for texture development dominated by deformation twinning: application to zirconium alloys. Acta Metallurgica Materialia 39 11 (1991) 2667-2680
    • (1991) Acta Metallurgica Materialia , vol.39 , Issue.11 , pp. 2667-2680
    • Tomé, C.N.1    Lebensohn, R.A.2    Kocks, U.F.3
  • 55
    • 0028723502 scopus 로고
    • A study of residual stresses in zircaloy-2 with rode texture
    • Turner P.A., and Tomé C.N. A study of residual stresses in zircaloy-2 with rode texture. Acta Metallurgica Materialia 42 12 (1994) 4143-4153
    • (1994) Acta Metallurgica Materialia , vol.42 , Issue.12 , pp. 4143-4153
    • Turner, P.A.1    Tomé, C.N.2
  • 56
    • 36248986116 scopus 로고    scopus 로고
    • Kinking nonlinear elasticity, damping and microyielding of hexagonal close-packed metals
    • Zhou A.G., Basu S., and Barsoum M.W. Kinking nonlinear elasticity, damping and microyielding of hexagonal close-packed metals. Acta Materialia 56 1 (2008) 60-67
    • (2008) Acta Materialia , vol.56 , Issue.1 , pp. 60-67
    • Zhou, A.G.1    Basu, S.2    Barsoum, M.W.3
  • 57
    • 33845870654 scopus 로고    scopus 로고
    • Simulation of earning during deep drawing of magnesium alloy AZ31
    • Walde T., and Hermann R. Simulation of earning during deep drawing of magnesium alloy AZ31. Acta Materialia 55 3 (2007) 867-874
    • (2007) Acta Materialia , vol.55 , Issue.3 , pp. 867-874
    • Walde, T.1    Hermann, R.2
  • 59
    • 0015681209 scopus 로고
    • Twinning deformation in magnesium compressed along the C-axis
    • Yoshinaga H., Obara T., and Morozumi S. Twinning deformation in magnesium compressed along the C-axis. Materials Science and Engineering 12 5-6 (1973) 255-264
    • (1973) Materials Science and Engineering , vol.12 , Issue.5-6 , pp. 255-264
    • Yoshinaga, H.1    Obara, T.2    Morozumi, S.3
  • 60
    • 38749130844 scopus 로고    scopus 로고
    • Twinning-detwinning behaviour during the strain-controlled low-cycle fatigue testing of a wrought magnesium alloy, ZK60A
    • - appeared in the journal 4 months after submission of the present manuscript to Acta Materialia on 14th of August 2007
    • Wu L., Agnew S.R., Brown D.W., Stoice G.M., Clausen B., Jain A., Fielden D.E., and Liew P.K. Twinning-detwinning behaviour during the strain-controlled low-cycle fatigue testing of a wrought magnesium alloy, ZK60A. Acta Materialia 56 4 (2008) 688-695 - appeared in the journal 4 months after submission of the present manuscript to Acta Materialia on 14th of August 2007
    • (2008) Acta Materialia , vol.56 , Issue.4 , pp. 688-695
    • Wu, L.1    Agnew, S.R.2    Brown, D.W.3    Stoice, G.M.4    Clausen, B.5    Jain, A.6    Fielden, D.E.7    Liew, P.K.8
  • 61
    • 47349108443 scopus 로고    scopus 로고
    • Internal stress relaxation and load redistribution during the twinning-detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A
    • - appeared in the journal 9 months after submission of the present manuscript to Acta Materialia on 14th of August 2007
    • Wu L., Agnew S.R., Brown D.W., Stoice G.M., Clausen B., Jain A., Fielden D.E., and Liew P.K. Internal stress relaxation and load redistribution during the twinning-detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A. Acta Materialia 56 14 (2008) 3699-3707 - appeared in the journal 9 months after submission of the present manuscript to Acta Materialia on 14th of August 2007
    • (2008) Acta Materialia , vol.56 , Issue.14 , pp. 3699-3707
    • Wu, L.1    Agnew, S.R.2    Brown, D.W.3    Stoice, G.M.4    Clausen, B.5    Jain, A.6    Fielden, D.E.7    Liew, P.K.8


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