Hydrogen effect on the mechanical behaviour and microstructural features of a Fe-Mn-C twinning induced plasticity steel

Abstract

The influences of hydrogen on the mechanical properties and the fracture behaviour of Fe-22Mn-0.6C twinning induced plasticity steel have been investigated by slow strain rate tests and fractographic analysis. The steel showed high susceptibility to hydrogen embrittlement, which led to 62.9% and 74.2% reduction in engineering strain with 3.1 and 14.4 ppm diffusive hydrogen, respectively. The fracture surfaces revealed a transition from ductile to brittle dominated fracture modes with the rising hydrogen contents. The underlying deformation and fracture mechanisms were further exploited by examining the hydrogen effects on the dislocation substructure, stacking fault probability, and twinning behaviour in pre-strained slow strain rate test specimens and notched tensile specimens using coupled electron channelling contrast imaging and electron backscatter diffraction techniques. The results reveal that the addition of hydrogen promotes planar dislocation structures, earlier nucleation of stacking faults, and deformation twinning within those grains which have tensile axis orientations close to <111>//rolling direction and <112gt;//rolling direction. The developed twin lamellae result in strain localization and micro-voids at grain boundaries and eventually lead to grain boundary decohesion.

Keywords

twinning induced plasticity steel / hydrogen / mechanical behaviour / dislocation / twinning / electron channelling contrast imaging

References

[1] De Cooman BC, Chin K-G, Kim J. Chiaberge M. High Mn TWIP steels for automotive applications. New Trends and Developments in Automotive System Engineering, 2011, Rijeka, IntechOpen

[2] Idrissi H, Renard K, Ryelandt L, Schryvers D, Jacques PJ. On the mechanism of twin formation in Fe-Mn-C TWIP steels. Acta Mater., 2010, 58(7): 2464.

[3] Yang CL, Zhang ZJ, Zhang P, Zhang ZF. The premature necking of twinning-induced plasticity steels. Acta Mater., 2017, 136, 1.

[4] Kim JS, Lee YH, Lee DL, Park K-T, Lee CS. Microstructural influences on hydrogen delayed fracture of high strength steels. Mater. Sci. Eng. A, 2009, 505(1–2): 105.

[5] Koyama M, Akiyama E, Tsuzaki K, Raabe D. Hydrogen-assisted failure in a twinning-induced plasticity steel studied under in situ hydrogen charging by electron channeling contrast imaging. Acta Mater., 2013, 61(12): 4607.

[6] Koyama M, Akiyama E, Lee Y-K, Raabe D, Tsuzaki K. Overview of hydrogen embrittlement in high-Mn steels. Int. J. Hydrogen Energy, 2017, 42(17): 12706.

[7] Beachem CD. A new model for hydrogen-assisted cracking (hydrogen “embrittlement”). Metall. Mater. Trans. B, 1972, 3(2): 441.

[8] Lynch SP. Environmentally assisted cracking: Overview of evidence for an adsorption-induced localised-slip process. Acta Metall., 1988, 36(10): 2639.

[9] Birnbaum HK, Sofronis P. Hydrogen-enhanced localized plasticity—A mechanism for hydrogen-related fracture. Mater. Sci. Eng. A, 1994, 176(1–2): 191.

[10] Abraham DP, Altstetter CJ. Hydrogen-enhanced localization of plasticity in an austenitic stainless steel. Metall. Mater. Trans. A, 1995, 26(11): 2859.

[11] McMahon CJ. Hydrogen-induced intergranular fracture of steels. Eng. Fract. Mech., 2001, 68(6): 773.

[12] Robertson IM. The effect of hydrogen on dislocation dynamics. Eng. Fract. Mech., 2001, 68(6): 671.

[13] Lynch S. Hydrogen embrittlement phenomena and mechanisms. Corros. Rev., 2012, 30(3–4): 105

[14] Nibur KA, Bahr DF, Somerday BP. Hydrogen effects on dislocation activity in austenitic stainless steel. Acta Mater., 2006, 54(10): 2677.

[15] Nagumo M, Takai K. The predominant role of strain-induced vacancies in hydrogen embrittlement of steels: Overview. Acta Mater., 2019, 165, 722.

[16] Gu YJ, El-Awady JA. Quantifying the effect of hydrogen on dislocation dynamics: A three-dimensional discrete dislocation dynamics framework. J. Mech. Phys. Solids, 2018, 112, 491.

[17] Chateau JP, Delafosse D, Magnin T. Numerical simulations of hydrogen-dislocation interactions in fcc stainless steels. Part I: Hydrogen-dislocation interactions in bulk crystals. Acta Mater., 2002, 50(6): 1507.

[18] Nagao A, Dadfarnia M, Somerday BP, Sofronis P, Ritchie RO. Hydrogen-enhanced-plasticity mediated decohesion for hydrogen-induced intergranular and “quasi-cleavage” fracture of lath martensitic steels. J. Mech. Phys. Solids, 2018, 112, 403.

[19] Novak P, Yuan R, Somerday BP, Sofronis P, Ritchie RO. A statistical, physical-based, micro-mechanical model of hydrogen-induced intergranular fracture in steel. J. Mech. Phys. Solids, 2010, 58(2): 206.

[20] Kirchheim R. Reducing grain boundary, dislocation line and vacancy formation energies by solute segregation. I. Theoretical background. Acta Mater., 2007, 55(15): 5129.

[21] Barnoush A, Asgari M, Johnsen R. Resolving the hydrogen effect on dislocation nucleation and mobility by electrochemical nanoindentation. Scripta Mater., 2012, 66(6): 414.

[22] Barnoush A, Vehoff H. Recent developments in the study of hydrogen embrittlement: Hydrogen effect on dislocation nucleation. Acta Mater., 2010, 58(16): 5274.

[23] Abraham DP, Altstetter CJ. The effect of hydrogen on the yield and flow stress of an austenitic stainless steel. Metall. Mater. Trans. A, 1995, 26(11): 2849.

[24] Verpoort C, Duquette DJ, Stoloff NS, Neu A. The influence of plastic deformation on the hydrogen embrittlement of nickel. Mater. Sci. Eng., 1984, 64(1): 135.

[25] Clum JA. The role of hydrogen in dislocation generation in iron alloys. Scripta Metall., 1975, 9(1): 51.

[26] Hatano M, Fujinami M, Arai K, Fujii H, Nagumo M. Hydrogen embrittlement of austenitic stainless steels revealed by deformation microstructures and strain-induced creation of vacancies. Acta Mater., 2014, 67, 342.

[27] Harris ZD, Lawrence SK, Medlin DL, Guetard G, Burns JT, Somerday BP. Elucidating the contribution of mobile hydrogen-deformation interactions to hydrogen-induced intergranular cracking in polycrystalline nickel. Acta Mater., 2018, 158, 180.

[28] Bouaziz O, Allain S, Scott CP, Cugy P, Barbier D. High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships. Curr. Opin. Solid State Mater. Sci., 2011, 15(4): 141.

[29] Gutierrez-Urrutia I, Raabe D. Dislocation and twin substructure evolution during strain hardening of an Fe-22wt.% Mn-0.6wt.% C TWIP steel observed by electron channeling contrast imaging. Acta Mater., 2011, 59(16): 6449.

[30] Saeed-Akbari A, Imlau J, Prahl U, Bleck W. Derivation and variation in composition-dependent stacking fault energy maps based on subregular solution model in high-manganese steels. Metall. Mater. Trans. A, 2009, 40(13): 3076.

[31] Chin KG, Kang CY, Shin SY, Hong S, Lee S, Kim HS, Kim KH, Kim NJ. Effects of Al addition on deformation and fracture mechanisms in two high manganese TWIP steels. Mater. Sci. Eng. A, 2011, 528(6): 2922.

[32] Lee SM, Park IJ, Jung JG, Lee YK. The effect of Si on hydrogen embrittlement of Fe-18Mn-0.6C-xSi twinning-induced plasticity steels. Acta Mater., 2016, 103, 264.

[33] Park IJ, Jeong KH, Jung JG, Lee CS, Lee YK. The mechanism of enhanced resistance to the hydrogen delayed fracture in Al-added Fe-18Mn-0.6C twinning-induced plasticity steels. Int. J. Hydrogen Energy, 2012, 37(12): 9925.

[34] Guo XF, Zaefferer S, Archie F, Bleck W. Dislocation and twinning behaviors in high manganese steels in respect to hydrogen and aluminium alloying. Procedia Struct. Integrity, 2018, 13, 1453.

[35] Chun YS, Park KT, Lee CS. Delayed static failure of twinning-induced plasticity steels. Scripta Mater, 2012, 66(12): 960.

[36] Koyama M, Akiyama E, Tsuzaki K. Hydrogen embrittlement in Al-added twinning-induced plasticity steels evaluated by tensile tests during hydrogen charging. ISIJ Int., 2012, 52(12): 2283.

[37] Dieudonné T, Marchetti L, Wery M, Chêne J, Allely C, Cugy P, Scott CP. Role of copper and aluminum additions on the hydrogen embrittlement susceptibility of austenitic Fe-Mn-C TWIP steels. Corros. Sci., 2014, 82, 218.

[38] Zan N, Ding H, Guo XF, Tang ZY, Bleck W. Effects of grain size on hydrogen embrittlement in a Fe-22Mn-0.6C TWIP steel. Int. J. Hydrogen Energy, 2015, 40(33): 10687.

[39] Kwon YJ, Jung SP, Lee BJ, Lee CS. Grain boundary engineering approach to improve hydrogen embrittlement resistance in Fe-Mn-C TWIP steel. Int. J. Hydrogen Energy, 2018, 43(21): 10129.

[40] Zaefferer S, Elhami NN. Theory and application of electron channelling contrast imaging under controlled diffraction conditions. Acta Mater., 2014, 75, 20.

[41] Dumay A, Chateau J-P, Allain S, Migot S, Bouaziz O. Influence of addition elements on the stacking-fault energy and mechanical properties of an austenitic Fe-Mn-C steel. Mater. Sci. Eng. A, 2008, 483–484, 184.

[42] Lian J, Sharaf M, Archie F, Münstermann S. A hybrid approach for modelling of plasticity and failure behaviour of advanced high-strength steel sheets. Int. J. Damage Mech., 2013, 22(2): 188.

[43] Ozturk F, Polat A, Toros S, Picu RC. Strain hardening and strain rate sensitivity behaviors of advanced high strength steels. J. Iron Steel Res. Int., 2013, 20(6): 68.

[44] Escobar DP, Depover T, Duprez L, Verbeken K, Verhaege M. Combined thermal desorption spectroscopy, differential scanning calorimetry, scanning electron microscopy and X-ray diffraction study of hydrogen trapping in cold deformed TRIP steel. Acta Mater., 2012, 60(6–7): 2593.

[45] X.F. Guo, Influences of Microstructure, Alloying Elements and Forming Parameters on Delayed Fracture in TRIP/TWIP-Aided Austenitic Steels [Dissertation], RWTH Aachen University, Aachen, 2012, p. 88.

[46] Kuhlmann-Wilsdorf D. Theory of plastic deformation — Properties of low energy dislocation structures. Mater. Sci. Eng. A, 1989, 113, 1.

[47] Allain S, Chateau J-P, Dahmoun D, Bouaziz O. Modelling of mechanical twinning in a high manganese content austenitic steel. Mater. Sci. Eng. A, 2004, 387–389, 272.

[48] M. Wen, S. Fukuyama, and K. Yokogawa, Hydrogen-affected cross-slip process in fcc nickel, Phys. Rev. B, 69(2004), No. 17, art. No. 174108.

[49] Y.Z. Tang and J.A. El-Awady, Atomistic simulations of the interactions of hydrogen with dislocations in fcc metals, Phys. Rev. B, 86(2012), No. 17, art. No. 174102.

[50] Han DK, Lee SK, Noh SJ, Kim S-K, Suh D-W. Effect of aluminium on hydrogen permeation of high-manganese twinning-induced plasticity steel. Scripta Mater., 2015, 99, 45.

[51] Pontini AE, Hermida JD. X-Ray diffraction measurement of the stacking fault energy reduction induced by hydrogen in an AISI 304 steel. Scripta Mater., 1997, 37(11): 1831.

[52] Hermida JD, Roviglione A. Stacking fault energy decrease in austenitic stainless steels induced by hydrogen pairs formation. Scripta Mater., 1998, 39(8): 1145.

[53] von Appen J, Dronskowski R, Chakrabarty A, Hickel T, Spatschek R, Neugebauer J. Impact of Mn on the solution enthalpy of hydrogen in austenitic Fe-Mn alloys: A first-principles study. J. Comput. Chem., 2014, 35(31): 2239.

[54] Cohen JB, Weertman J. A dislocation model for twinning in f.c.c. metals. Acta Metall., 1963, 11(8): 996.

[55] D. Steinmetz, A Constitutive Model of Twin Nucleation and Deformation Twinning in High-Manganese Austenitic TWIP Steels [Dissertation], RWTH Aachen University, Aachen, 2013.

[56] Bal B, Koyama M, Gerstein G, Maier HJ, Tsuzaki K. Effect of strain rate on hydrogen embrittlement susceptibility of twinning-induced plasticity steel pre-charged with high-pressure hydrogen gas. Int. J. Hydrogen Energy, 2016, 41(34): 15362.

[57] Evers S, Rohwerder M. The hydrogen electrode in the “dry”: A Kelvin probe approach to measuring hydrogen in metals. Electrochem. Commun., 2012, 24, 85.

[58] D. Wang, X. Lu, D. Wan, X.F. Guo, R. Johnsen, Effect of hydrogen on the embrittlement susceptibility of Fe-22Mn-0.6C TWIP steel revealed by in-situ tensile tests, Mater. Sci. Eng. A, 802(2021), art. No. 140638.

[59] Müllner P. Disclination models for deformation twinning. Solid State Phenom., 2002, 87, 227.

[60] Wang D, Lu X, Deng Y, Guo XF, Barnoush A. Effect of hydrogen on nanomechanical properties in Fe-22Mn-0.6C TWIP steel revealed by in-situ electrochemical nanoindentation. Acta Mater., 2019, 166, 618.

[61] Faccoli M, Cornacchia G, Gelfi M, Panvini A, Roberti R. Notch ductility of steels for automotive components. Eng. Fract. Mech., 2014, 127, 181.

[62] Rehrl J, Mraczek K, Pichler A, Werner E. Mechanical properties and fracture behavior of hydrogen charged AHSS/UHSS grades at high- and low strain rate tests. Mater. Sci. Eng. A, 2014, 590, 360.