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Experimental Observations on the Mechanical Response of AZ31B Magnesium and AA6061-T6 Aluminum Extrusions Subjected to Compression and Cutting Modes of Deformation
Technical Paper
2017-01-0377
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Cylindrical extrusions of magnesium AZ31B were subjected to quasi-static axial compression and cutting modes of deformation to study this alloy’s effectiveness as an energy absorber. For comparison, the tests were repeated using extrusions of AA6061-T6 aluminum of the same geometry. For the axial compression tests, three different end geometries were considered, namely (1) a flat cutoff, (2) a 45 degree chamfer, and (3) a square circumferential notch. AZ31B extrusions with the 45 degree chamfer produced the most repeatable and stable deformation of a progressive fracturing nature, referred to as sharding, with an average SEA of 40 kJ/kg and an average CFE of 45 %, which are nearly equal to the performance of the AA6061-T6. Both the AZ31B specimens with the flat cutoff and the circumferential notch conditions were more prone to tilt mid-test, and lead to an unstable helical fracture, which significantly reduced the SEA. Axial cutting of AA6061-T6 extrusions has been shown to be an effective, ductile mode of energy dissipation, yielding a repeatable, nearly constant load/deflection response with a crush force efficiency (CFE) up to 96%. In the present tests, the quasi-static cutting deformation of AZ31B extrusions achieved a respectable CFE of 80%, but revealed a load/deflection response with sharp, minute, rapid fluctuations, indicating an undesirable fracturing failure. Additionally, the average specific energy absorption (SEA) of AZ31B was 11 kJ/kg, which is less than half that seen for AA6061-T6 extrusions of the same geometry (24 kJ/kg). An analytical model of the cutting deformation of AA6061-T6 extrusions can predict the steady state cutting force to within 10%. However, the model did not agree well with the experimental results of AZ31B, yielding approximately 150% error. This deviation is likely attributed to the brittle deformation nature of AZ31B that is not accounted for in the model.
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Authors
Citation
Shery, P., Altenhof, W., Smith, R., Beeh, E. et al., "Experimental Observations on the Mechanical Response of AZ31B Magnesium and AA6061-T6 Aluminum Extrusions Subjected to Compression and Cutting Modes of Deformation," SAE Technical Paper 2017-01-0377, 2017, https://doi.org/10.4271/2017-01-0377.Data Sets - Support Documents
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References
- Liu , K. , Wang , X. , and Du , W. Development of extraordinary high-strength-toughness Mg alloy via combined processes of repeated plastic working and hot extrusion Materials Science & Engineering A 573 127 131 2013 10.1016/j.msea.2013.02.030
- Du , Y.Z. , Zheng , M.Y. , Qiao , X.G. , Wu , K. et al. The effect of double extrusion on the microstructure and mechanical properties of Mg-Zn-Ca alloy Materials Science & Engineering A 583 69 77 2013 10.1016/j.msea.2013.06.054
- Li , X. , Liu , C. , and Al-Samman , T. Microstructure and mechanical properties of Mg -2Gd -3Y -0.6Zr alloy upon conventional and hydrostatic extrusion Materials Letters 65 1726 1729 2011 10.1016/j.matlet.2011.02.073
- Zhang , X. , Yuan , G. , and Wang , Z. Mechanical properties and biocorrosion resistance of Mg-Nd-Zn-Zr alloy improved by cyclic extrusion and compression Materials Letters 74 128 131 2012 10.1016/j.matlet.2012.01.086
- Yu , H. , Park , S.H. , and You , B.S. Development of extraordinary high-strength Mg-8Al-0.5Zn alloy via a low temperature and slow speed extrusion Materials Science & Engineering A 610 445 449 2014 10.1016/j.msea.2014.05.058
- Li , X. , Qi W. , Zheng , K. , and Zhou , N. Enhanced strength and ductility of Mg-Gd-Y-Zr alloys by secondary extrusion Journal of Magnesium and Alloys 1 54 63 2013 10.1016/j.jma.2013.02.006
- Luo , A.A. , Mishra , R.K. , and Sachdev , A.K. High-ductility magnesium-zinc-cerium extrusion alloys Scripta Materialia 64 410 413 2011 10.1016/j.scriptamat.2010.10.045
- Mishra , R.K. , Gupta , A.K. , Rama Rao , P. , Sachdev , A.K. et al. Influence of cerium on the texture and ductility of magnesium extrusions Scripta Materialia 59 562 565 2008 10.1016/j.scriptamat.2008.05.019
- Cheng , J. and Ghosh , S. A crystal plasticity FE model for deformation with twin nucleation in magnesium alloys International Journal of Plasticity 67 148 170 2015 10.1016/j.ijplas.2014.10.005
- Chino , Y. , Kimura , K. , and Mabuchi , M. Twinning behavior and deformation mechanisms of extruded AZ31 Mg alloy Materials Science and Engineering A 486 481 488 2008 10.1016/j.msea.2007.09.058
- Xu , S.W. , Oh-ishi , K. , Kamado , S. , and Homma , T. Twins, recrystallization and texture evolution of a Mg-5.99Zn-1.76Ca-0.35Mn (wt.%) alloy during indirect extrusion process Scripta Materialia 65 875 878 2011 10.1016/j.scriptamat.2011.07.053
- Lin , X.Z. and Chen , D.L. Strain hardening and strain-rate sensitivity of an extruded magnesium alloy Journal of Materials Engineering and Performance 17 6 894 901 2008 10.1007/s11665-008-9247-z
- Kurukuri , S. , Worswick , M.J. , Tari , D.G. , Mishra , R.K. et al. Rate sensitivity and tension-compression asymmetry in AZ31B magnesium alloy sheet Phil. Trans. R. Soc A 372 1 16 2014 10.1098/rsta.2013.0216
- Powell , B.R. , Krajewski , P.E. , and Luo , A.A. Magnesium alloys for light powertrains and automotive structures Materials, Design and Manufacturing for Lightweight Vehicle Mallick , P.K. Cambridge, UK Woodhead Publishing ltd 2010 114 173 978-1-84569-463-0
- Easton , M. , Beer , A. , Barnett , M. , Davies , C. et al. Magnesium Alloy Applications in Automotive Structures Journal of the Minerals, Metals, and Materials Society 60 11 57 62 2008 10.1007/s11837-008-0150-8
- Beggs , D. , Song , W. , and Easton , M. Failure modes during uniaxial deformation of magnesium alloy AZ31B tubes International Journal of Mechanical Sciences 52 1634 1645 2010 10.1016/j.ijmecsci.2010.08.005
- Yoon , J. , Lee , Y. , and Huh , H. Investigation of deformation and collapse mechanism for magnesium tube in axial crushing test Journal of Mechanical Science and Technology 27 10 2917 2921 2013 10.1007/s12206-013-0803-6
- Smith , R. , Strausburger , P. , Altenhof , W. , and Beeh , E. Load/displacement and energy dissipation performances of aluminum and magnesium extrusions subjected to quasi-static and dynamic loading under axial crush and cutting deformation modes Light Metals 2015 Hyland , M. Hoboken, New Jersey John Wiley & Sons Inc. 2015 251 256 10.1002/9781119093435.ch43
- Zhu , F. , Chou , C.C. , Yang , K.H. , Chen , X. et al. Calibrating material parameters to model the thin-walled components made of die cast AM60B magnesium alloy International Journal of Crashworthiness 17 5 540 552 2012 10.1080/13588265.2012.698577
- Dorum , C. , Hopperstad , O.S. , Lademo , O.G. , and Langseth , M. Aluminium and magnesium castings -experimental work and numerical analyses International Journal of Crashworthiness 8 5 455 470 2003 10.1533/ijcr.2003.0251
- Steglich , D. , Tian , X. , Bohlen , J. , Riekehr , S. et al. Experimental and numerical crushing analyses of thin-walled magnesium profiles International Journal of Crashworthiness 20 2 177 190 2015 10.1080/13588265.2014.996319
- Xu , S. , Tyson , W.R. , Eageleson , R. , Zavadil , R. et al. Dependence of flow strength and deformation mechanisms in common wrought and die cast magnesium alloys on orientation, strain rate and temperature Journal of Magnesium and Alloys 1 275 282 2013 10.1016/j.jma.2013.11.003
- Lentz , M. , Klaus , M. , Reimers , W. , and Clausen , B. Effect of high temperature heat treatments on the deformation behavior of Mg-2%Mn-0.7%Ce extrusions investigated by in-situ energy-dispersive synchrotron X-ray diffraction and elasto-plastic self-consistent modeling Materials Science & Engineering A 586 178 189 2013 10.1016/j.msea.2013.08.020
- Xu , S. , Tyson , W.R. , Bouchard , R. , and Gertsman , V.Y. Effects of strain rate and temperature on tensile flow behavior and energy absorption of extruded magnesium AM30 alloy Journal of Materials Engineering and Performance 18 8 1091 1101 2009 10.1007/s11665-008-9332-3
- Altenhof , W. , Jin , S.Y. , and Majumder , A. Kinetic energy dissipation system for dissipating kinetic shock energy U. S. Patent 8347775B2 January 8 2013
- Cheng , Q. and Altenhof , W. Load/displacement and energy absorption performances of AA6061-T6 tubes under a cutting deformation mode International Journal of Crashworthiness 10 6 621 633 2005 10.1533/ijcr.2005.0376
- Jin , S.Y. , Altenhof , W. , and Kapoor , T. An experimental investigation into the cutting deformation mode of AA6061-T6 round extrusions Thin Walled Structures 44 773 786 2006 10.1016/j.tws.2006.05.009
- Jin , S.Y. and Altenhof , W. An analytical model on the steady-state deformation of circular tubes under an axial cutting deformation mode International Journal of Solids and Structures 48 269 279 2011 10.1016/j.ijsolstr.2010.10.001
- Jin , S.Y. , Majumder , A. , Altenhof , W. , and Green , D. Axial cutting of AA6061-T6 circular extrusions under impact using single and dual cutter configurations International Journal of Impact Engineering 37 735 753 2010 10.1016/j.ijimpeng.2009.01.003
- Jin , S.Y. , Altenhof , W. , and Li , Z. A parametric study on extrusion geometry and blade quantity during axial cutting deformation of circular AA6061-T6 extrusions under impact and quasi-static loading International Journal of Impact Engineering 49 165 178 2012 10.1016/j.ijimpeng.2012.03.008
- Jin S.Y. , and Altenhof , W. Control of load/displacement responses of AA6061 and T4 circular extrusions under axial compressive loads International Journal of Impact Engineering 38 1 12 2011 10.1016/j.ijimpeng.2010.09.001
- Jin , S.Y. Novel cutting deformation modes on axially loaded circular AA6061-T6 extrusions for superior crashworthiness performance M. S. thesis Department of Mechanical, Automotive, and Materials Engineering, University of Windsor Windsor, ON 2012
- Jin S.Y. , and Altenhof , W. Comparison of the load/displacement and energy absorption performance of round and square AA6061-T6 extrusions under a cutting deformation mode International Journal of Crashworthiness 12 3 265 278 2007 10.1080/13588260701441183
- Jin S.Y. , and Altenhof , W. Experimental observations of AA6061-T6 round extrusions under a cutting deformation mode with a deflector International Journal of Crashworthiness 13 2 127 138 2008 10.1080/13588260701740113
- Nyberg , E.A. , Luo , A.A. , Sadayappan , K. , and Shi , W. Magnesium for future autos Advanced Materials and Processes 166 10 35 37 2008
- Friedrich , H. , and Schumann , S. Research for a ‘new age of magnesium’ in the automotive industry Journal of Materials Processing Technology 117 3 276 281 2001 10.1016/S0924-0136(01)00780-4
- Parrish , A. , Rais-Rohani , M. , and Najafi , A. Crashworthiness optimisation of vehicle structures with magnesium alloy parts International Journal of Crashworthiness 17 3 259 281 2012 10.1080/13588265.2011.648518
- Luo , A.A. Magnesium casting technology for structural applications Journal of Magnesium and Alloys 1 2 22 2013 10.1016/j.jma.2013.02.002
- Chapuis , A. , Wang , B. , and Liu , Q. A comparative study between uniaxial compression and plane strain compression of Mg-3Al-1Zn alloy using experiments and simulations Materials Science and Engineering A 597 349 358 2014 10.1016/j.msea.2014.01.021
- Cheng , Q. , Altenhof , W. , and Li , L. Experimental investigations on the crush behaviour of AA6061-T6 aluminum square tubes with different types of through-hole discontinuities Thin-Walled Structures 44 441 454 2006 10.1016/j.tws.2006.03.017
- Zheng , Z.M. and Wierzbicki , T. A theoretical study of steady-state wedge cutting through metal plates International Journal of Fracture 78 1 45 66 1996 10.1007/BF00018500