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Influence of pre-compression on the ductility of AA6xxx aluminium alloys

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Abstract

Reversed loading experiments were conducted to study the influence of pre-compression on the ductility of three aluminium alloys. Diabolo-shaped specimens were machined from extruded profiles along the transverse direction, and heat treated to peak strength (T6 temper). The specimens were subjected to five different levels of pre-compression (0, 10, 20, 30, 40%), i.e., the specimens were first compressed to a prescribed strain and then pulled to fracture in tension. Using a laser-based measuring system, the minimum diameter in the extrusion direction and thickness direction were continuously measured during the tests until fracture. The three aluminium alloys AA6060, AA6082.25 and AA6082.50 had different grain structure and texture. The AA6060 and AA6082.50 alloys had recrystallized grain structure with equi-axed grains and large elongated grains, respectively. The AA6082.25 alloy had a non-recrystallized, fibrous grain structure. It was found that pre-compression has a marked influence on the ductility of the aluminium alloys, which depends on the microstructure and strength of the alloy. Using the compressed configuration as the reference configuration, the relative failure strain could be calculated. For the AA6060 alloy, the relative failure strain increased for increasing pre-compression, and was approximately doubled for 40% pre-compression compared to pure tension. For the AA6082.25 alloy, a slight increase in the relative failure strain was observed for increasing pre-compression, while for the AA6082.50 alloy the relative failure strain was low and approximately constant for different levels of pre-compression.

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References

  • Bai Y, Wierzbicki T (2008) A new model of metal plasticity and fracture with pressure and lode dependence. Int J Plast 24(6):1071–1096

    Article  Google Scholar 

  • Bao Y, Treitler R (2004a) Ductile crack formation on notched Al2024-T351 bars under compression–tension loading. Mater Sci Eng A 384(1–2):385–394

    Article  Google Scholar 

  • Bao Y, Wierzbicki T (2004b) On fracture locus in the equivalent strain and stress triaxiality space. Int J Mech Sci 46(1):81–98

    Article  Google Scholar 

  • Barsoum I, Faleskog J (2007) Rupture mechanisms in combined tension and shear—experiments. Int J Solids Struct 44(6):1768–1786

    Article  Google Scholar 

  • Benzerga AA, Surovik D, Keralavarma SM (2012) On the path-dependence of the fracture locus in ductile materials—analysis. Int J Plast 37:157–170

    Article  Google Scholar 

  • Bouchard PO, Bourgeon L, Lachapèle H, Maire E, Verdu C, Forestier R, Logé RE (2008) On the influence of particle distribution and reverse loading on damage mechanisms of ductile steels. Mater Sci Eng A 496(1–2):223–233

    Article  Google Scholar 

  • Campbell J (2011) The origin of Griffith cracks. Metall Mater Trans B 42(6):1091–1097

    Article  Google Scholar 

  • Chen Y, Pedersen KO, Clausen AH, Hopperstad OS (2009) An experimental study on the dynamic fracture of extruded AA6xxx and AA7xxx aluminium alloys. Mater Sci Eng A 523(1–2):253–262

    Article  Google Scholar 

  • Christiansen E (2017) Personal communication. Centre for Advanced Structural Analysis (CASA), Norwegian University of Science and Technology (NTNU)

  • Dæhli LEB, Børvik T, Hopperstad OS (2016) Influence of loading path on ductile fracture of tensile specimens made from aluminium alloys. Int J Solids Struct 88–89:17–34

    Article  Google Scholar 

  • Dowling JM, Martin JW (1976) The influence of MN additions on the deformation behaviour of an Al–Mg–Si alloy. Acta Metall 24(12):1147–1153

    Article  Google Scholar 

  • Drucker DC, Mylonas C, Lianis G (1960) Exhaustion of ductility of E-steel in tension following compressive prestrain. Weld J (Res Suppl) 39:117–120

    Google Scholar 

  • Enami K (2005) The effects of compressive and tensile prestrain on ductile fracture initiation in steels. Eng Fract Mech 72(7):1089–1105

    Article  Google Scholar 

  • Faleskog J, Barsoum I (2013) Tension-torsion fracture experiments—part I: experiments and a procedure to evaluate the equivalent plastic strain. Int J Solids Struct 50(25–26):4241–4257

    Article  Google Scholar 

  • Gao X, Zhang G, Roe C (2009) A study on the effect of the stress state on ductile fracture. Int J Damage Mech 19(1):75–94

    Google Scholar 

  • Graham SM, Zhang T, Gao X, Hayden M (2012) Development of a combined tension-torsion experiment for calibration of ductile fracture models under conditions of low triaxiality. Int J Mech Sci 54(1):172–181

    Article  Google Scholar 

  • Gruben G, Fagerholt E, Hopperstad OS, Børvik T (2011) Fracture characteristics of a cold-rolled dual-phase steel. Eur J Mech A Solids 30(3):204–218

    Article  Google Scholar 

  • Gruben G, Hopperstad OS, Børvik T (2012) Evaluation of uncoupled ductile fracture criteria for the dual-phase steel Docol 600DL. Int J Mech Sci 62(1):133–146

    Article  Google Scholar 

  • Hoang NH, Hopperstad OS, Myhr OR, Marioara C, Langseth M (2015) An improved nano-scale material model applied in axial-crushing analyses of square hollow section aluminium profiles. Thin Walled Struct 92:93–103

    Article  Google Scholar 

  • Khadyko M, Dumoulin S, Børvik T, Hopperstad OS (2014) An experimental-numerical method to determine the work-hardening of anisotropic ductile materials at large strains. Int J Mech Sci 88:25–36

    Article  Google Scholar 

  • Khadyko M, Dumoulin S, Børvik T, Hopperstad OS (2015) Simulation of large-strain behaviour of aluminium alloy under tensile loading using anisotropic plasticity models. Comput Struct 157:60–75

    Article  Google Scholar 

  • Khadyko M, Marioara CD, Ringdalen IG, Dumoulin S, Hopperstad OS (2016) Deformation and strain localization in polycrystals with plastically heterogeneous grains. Int J Plast 86:128–150

    Article  Google Scholar 

  • Kristoffersen M, Børvik T, Westermann I, Langseth M, Hopperstad OS (2013) Impact against X65 steel pipes—an experimental investigation. Int J Solids Struct 50(20–21):3430–3445

    Article  Google Scholar 

  • Kristoffersen M, Børvik T, Hopperstad OS (2016) Using unit cell simulations to investigate fracture due to compression–tension loading. Eng Fract Mech 162:269–289

    Article  Google Scholar 

  • Lloyd DJ (2003) The scaling of the tensile ductile fracture strain with yield strength in Al alloys. Scr Mater 48(4):341–344

    Article  Google Scholar 

  • Lohne O, Naess OJ (1979) The effect of dispersoids and grain size on mechanical properties of AlMgSi alloys. In: Haasen P, Gerold V, Kostorz G (eds) Strength of metals and alloys. Pergamon, Oxford, pp 781–788

    Chapter  Google Scholar 

  • Ludley JH, Drucker DC (1960) A reversed bend test to study ductile to brittle transition. Weld J 39:543s–546s

    Google Scholar 

  • Maire E, Zhou S, Adrien J, Dimichiel M (2011) Damage quantification in aluminium alloys using in situ tensile tests in X-ray tomography. Eng Fract Mech 78(15):2679–2690

    Article  Google Scholar 

  • Marcadet SJ, Mohr D (2015) Effect of compression-tension loading reversal on the strain to fracture of dual phase steel sheets. Int J Plast 72:21–43

    Article  Google Scholar 

  • Morgeneyer TF, Starink MJ, Wang SC, Sinclair I (2008) Quench sensitivity of toughness in an Al alloy: direct observation and analysis of failure initiation at the precipitate-free zone. Acta Mater 56(12):2872–2884

    Article  Google Scholar 

  • Papasidero J, Doquet V, Mohr D (2015) Ductile fracture of aluminum 2024-T351 under proportional and non-proportional multi-axial loading: Bao–Wierzbicki results revisited. Int J Solids Struct 69–70:459–474

    Article  Google Scholar 

  • Pedersen KO, Roven HJ, Lademo OG, Hopperstad OS (2008) Strength and ductility of aluminium alloy AA7030. Mater Sci Eng A 473(1–2):81–89

    Article  Google Scholar 

  • Pedersen KO, Westermann I, Furu T, Børvik T, Hopperstad OS (2015) Influence of microstructure on work-hardening and ductile fracture of aluminium alloys. Mater Des 70:31–44

    Article  Google Scholar 

  • Pineau A, Benzerga AA, Pardoen T (2016) Failure of metals I: brittle and ductile fracture. Acta Mater 107:424–483

    Article  Google Scholar 

  • Spitzig WA, Richmond O (1984) The effect of pressure on the flow stress of metals. Acta Metall 32(3):457–463

    Article  Google Scholar 

  • Spitzig WA, Sober RJ, Richmond O (1975) Pressure dependence of yielding and associated volume expansion in tempered martensite. Acta Metall 23(7):885–893

    Article  Google Scholar 

  • Thomas N, Basu S, Benzerga AA (2016) On fracture loci of ductile materials under non-proportional loading. Int J Mech Sci 117:135–151

    Article  Google Scholar 

  • Toda H, Oogo H, Horikawa K, Uesugi K, Takeuchi A, Suzuki Y, Nakazawa M, Aoki Y, Kobayashi M (2013) The true origin of ductile fracture in aluminum alloys. Metall Mater Trans A 45(2):765–776

    Article  Google Scholar 

  • Westermann I, Pedersen KO, Furu T, Børvik T, Hopperstad OS (2014) Effects of particles and solutes on strength, work-hardening and ductile fracture of aluminium alloys. Mech Mater 79:58–72

    Article  Google Scholar 

  • Wilson CD (2002) A critical reexamination of classical metal plasticity. J Appl Mech Trans ASME 69(1):63–68

    Article  Google Scholar 

Download references

Acknowledgements

The financial support of this work from the Centre for Advanced Structural Analysis (CASA), Centre for Research-based Innovation (CRI) at the Norwegian University of science and Technology (NTNU), is gratefully acknowledged. M.Sc. Emil Christiansen at CASA is gratefully acknowledged for providing the data of the precipitate free zones for the three alloys.

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Authors and Affiliations

  1. Structural Impact Laboratory (SIMLab) and Centre for Advanced Structural Analysis (CASA), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway

    B. H. Frodal, T. Børvik & O. S. Hopperstad

  2. SINTEF Materials and Chemistry, 7465, Trondheim, Norway

    K. O. Pedersen

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  1. B. H. Frodal
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  2. K. O. Pedersen
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  3. T. Børvik
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  4. O. S. Hopperstad
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Correspondence to B. H. Frodal.

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Frodal, B.H., Pedersen, K.O., Børvik, T. et al. Influence of pre-compression on the ductility of AA6xxx aluminium alloys. Int J Fract 206, 131–149 (2017). https://doi.org/10.1007/s10704-017-0204-4

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  • DOI: https://doi.org/10.1007/s10704-017-0204-4

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