Hydrogen embrittlement behaviors of ultrafine-grained 22Mn–0.6C austenitic twinning induced plasticity steel

Hydrogen embrittlement behaviors of a 22Mn–0.6C (mass%) twinning induced plasticity (TWIP) steel with the grain sizes of 21 µm (coarse grain) and 0.58 µm (ultrafine grain) were investigated by means of hydrogen precharging and subsequent slow strain rate tensile tests. The total elongation and fracture stress for both of the coarse-grained and ultrafine-grained specimens decreased by hydrogen charging. The area fraction of the brittle fracture surfaces in the ultrafine-grained specimen was much smaller than that in the coarse-grained specimen. Three-point bending test also showed that the reduction of the fracture toughness by the introduction of hydrogen was much smaller in the ultrafine-grained specimen than that in the coarse-grained specimen. It was concluded that the suppressed hydrogen embrittlement by grain refinement in the 22Mn–0.6C TWIP steel was probably due to the smaller hydrogen contents per unit grain boundary area in the finer grain-sized material.

[1]  N. Tsuji,et al.  Effect of grain refinement on hydrogen embrittlement behaviors of high-Mn TWIP steel , 2016 .

[2]  W. Bleck,et al.  Effects of grain size on hydrogen embrittlement in a Fe-22Mn-0.6C TWIP steel , 2015 .

[3]  Hyunkyu Jeon,et al.  The advantage of grain refinement in the hydrogen embrittlement of Fe–18Mn–0.6C twinning-induced plasticity steel , 2015 .

[4]  M. C. Chen,et al.  Enhanced Strength and Ductility in an Ultrafine-Grained Fe-22Mn-0.6C Austenitic Steel Having Fully Recrystallized Structure , 2014, Metallurgical and Materials Transactions A.

[5]  L. Rong,et al.  Effect of grain size on the hydrogen embrittlement sensitivity of a precipitation strengthened Fe–Ni based alloy , 2014 .

[6]  M. Koyama,et al.  Hydrogen-assisted failure in a twinning-induced plasticity steel studied under in situ hydrogen char , 2013 .

[7]  N. Tsuji,et al.  Fully recrystallized nanostructure fabricated without severe plastic deformation in high-Mn austenitic steel , 2013 .

[8]  D. Suh,et al.  Effect of aluminium on hydrogen-induced fracture behaviour in austenitic Fe–Mn–C steel , 2013, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[9]  S. Weber,et al.  Hydrogen environment embrittlement of stable austenitic steels , 2012 .

[10]  Chun‐Sing Lee,et al.  Delayed static failure of twinning-induced plasticity steels , 2012 .

[11]  Young‐kook Lee,et al.  The mechanism of enhanced resistance to the hydrogen delayed fracture in Al-added Fe–18Mn–0.6C twinning-induced plasticity steels , 2012 .

[12]  S. K. Kim,et al.  Hydrogen effects on cathodically charged twinning-induced plasticity steel , 2012 .

[13]  M. Koyama,et al.  Effect of hydrogen content on the embrittlement in a Fe–Mn–C twinning-induced plasticity steel , 2012 .

[14]  B C De Cooman,et al.  State-of-the-knowledge on TWIP steel , 2012 .

[15]  M. Koyama,et al.  Hydrogen-induced cracking at grain and twin boundaries in an Fe–Mn–C austenitic steel , 2012 .

[16]  N. Tsuji,et al.  Microstructural and Crystallographic Features of Hydrogen-related Crack Propagation in Low Carbon Martensitic Steel , 2012 .

[17]  O. Bouaziz,et al.  High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships , 2011 .

[18]  Sunghak Lee,et al.  Effects of Al addition on deformation and fracture mechanisms in two high manganese TWIP steels , 2011 .

[19]  Young‐kook Lee,et al.  Hydrogen Delayed Fracture Properties and Internal Hydrogen Behavior of a Fe-18Mn-1.5Al-0.6C TWIP Steel , 2009 .

[20]  N. Tsuji,et al.  Tensile properties and twinning behavior of high manganese austenitic steel with fine-grained structure , 2008 .

[21]  O. Bouaziz,et al.  Influence of addition elements on the stacking-fault energy and mechanical properties of an austenitic Fe–Mn–C steel , 2008 .

[22]  K. Takai,et al.  Hydrogen in Trapping States Innocuous to Environmental Degradation of High-strength Steels , 2003 .

[23]  Peter Neumann,et al.  Supra-Ductile and High-Strength Manganese-TRIP/TWIP Steels for High Energy Absorption Purposes , 2003 .

[24]  N. Tsuji,et al.  Strength and ductility of ultrafine grained aluminum and iron produced by ARB and annealing , 2002 .

[25]  K. Tsuzaki,et al.  Relationship between Microstructure and Hydrogen Absorption Behavior in a V-bearing High Strength Steel , 2002 .

[26]  M. Nagumo,et al.  Nature of hydrogen trapping sites in steels induced by plastic deformation , 1999 .

[27]  G. Frommeyer,et al.  Effect of martensitic phase transformation and deformation twinning on mechanical properties of Fe–Mn–Si–AI steels , 1998 .

[28]  G. B. Olson,et al.  Strain Hardening of Hadfield Manganese Steel , 1986 .

[29]  M. Koyama,et al.  Hydrogen embrittlement in a Fe–Mn–C ternary twinning-induced plasticity steel , 2012 .

[30]  Jai-Young Lee,et al.  Thermal analysis of trapped hydrogen in pure iron , 1982 .