Processing conditions better than those of conventional quenching and partitioning process are suggested for 0.2C–10Mn–2Al steel. The steel can retain 24% of austenite on quenching to room temperature and effectively partition carbon from martensite to austenite at 200°C. The resulting tensile properties were comparable to those produced by conventional quenching and partitioning. Moreover, the suggested processing condition resolves an issue of intercritically annealed medium Mn steels by improving the yield strength and eliminating yield point phenomenon as well as serrated flow.
This paper is part of a Thematic Issue on Medium Manganese Steels.
SuhDW, ParkSJ, LeeTH, Influence of Al on the microstructural evolution and mechanical behavior of low-carbon, manganese transformation-induced-plasticity steel. Metall Mater Trans A. 2010;41:397–408. doi: 10.1007/s11661-009-0124-7
2.
LeeS, De CoomanBC.Annealing temperature dependence of the tensile behavior of 10 pct Mn multi-phase TWIP-TRIP steel. Metall Mater Trans A. 2014;45:6039–6052. doi: 10.1007/s11661-014-2540-6
3.
MillerRL.Ultrafine-grained microstructures and mechanical properties of alloy steels. Metall Mater Trans B. 1972;3:905–912. doi: 10.1007/BF02647665
TsuchiyamaT, InoueT, TobataJ, Microstructure and mechanical properties of a medium manganese steel treated with interrupted quenching and intercritical annealing. Scr. Mater. 2016;122:36–39. doi: 10.1016/j.scriptamat.2016.05.019
6.
ChoL, SeoEJ, De CoomanBC.Near-Ac3 austenitized ultra-fine-grained quenching and partitioning (Q&P) steel. Scr Mater. 2016;123:69–72. doi: 10.1016/j.scriptamat.2016.06.003
7.
SeoEJ, ChoL, De CoomanBC.Application of quenching and partitioning processing to medium Mn steel. Metall Mater Trans A. 2015;46:27–31. doi: 10.1007/s11661-014-2657-7
8.
SeoEJ, ChoL, EstrinY, Microstructure-mechanical properties relationships for quenching and partitioning (Q&P) processed steel. Acta. Mater. 2016;113:124–139. doi: 10.1016/j.actamat.2016.04.048
9.
SeoEJ, ChoL, De CoomanBC.Kinetics of the partitioning of carbon and substitutional alloying elements during quenching and partitioning (Q&P) processing of medium Mn steel. Acta Mater. 2016;107:354–365. doi: 10.1016/j.actamat.2016.01.059
10.
SpeerJG, De MoorE, ClarkeAJ.Critical assessment 7: quenching and partitioning. Mater Sci Technol. 2015;31:3–9. doi: 10.1179/1743284714Y.0000000628
11.
De CoomanBC, LeeSJ, ShinS, Combined intercritical annealing and Q&P processing of medium Mn steel. Metall Mater Trans A. 2017;48:39–45. doi: 10.1007/s11661-016-3821-z
12.
YiHL, DuPJ, WangBG.A new invention of press-hardened steel achieving 1880 MPa tensile strength combined with 16% elongation in hot-stamped parts. In: SteinhoffK, OldenburgM, PrakashB, editor. Proc. of the hot sheet metal forming of high-performance steel. Toronto: Verlag wissenschaftliche scripten; 2015. p. 725–734.
13.
BhadeshiaHKDH, DavidSA, VitekJM, Stress induced transformation to bainite in Fe-Cr-Mo-C pressure vessel steel. Mater Sci Technol. 1991;7:686–698. doi: 10.1179/mst.1991.7.8.686
14.
DysonDJ, HolmesB.Effect of alloying additions on the lattice parameter of austenite. J Iron Steel Inst. 1970;208:469–474.
15.
LeeSW, LeeSJ, Santhosh KumarS, Localized deformation in multiphase, ultra-fine-grained 6 pct Mn transformation-induced plasticity steel. Metall Mater Trans A. 2011;42A:3638–3651. doi: 10.1007/s11661-011-0636-9
16.
HanJ, LeeSJ, JungJG, The effects of the initial martensite microstructure on the microstructure and tensile properties of intercritically annealed Fe–9Mn–0.05C steel. Acta Mater. 2014;78:369–377. doi: 10.1016/j.actamat.2014.07.005
17.
JangJM, KimSJ, KangNH, Effects of annealing conditions on microstructure and mechanical properties of low carbon, manganese transformation-induced plasticity steel. Met Mater Int. 2009;15:909–916. doi: 10.1007/s12540-009-0909-7
18.
MahieuJ, De CoomanBC, MakiJ.Phase transformation and mechanical properties of Si-free CMnAl transformation-induced plasticity-aided steel. Metall Mater Trans A. 2002;33:2573–2580. doi: 10.1007/s11661-002-0378-9
19.
KrizanD, SteinederK, RehrlJ, Development of medium-Mn steels via batch and continuous annealing. Thermec. 2016; 2016 May 31; Graz, Austria.
20.
HeoYU, KimDH, HeoNH, Deformation behavior in medium Mn steel of nanometer-sized α´+ γ lamellar structure. Metall Mater Trans A. 2016;47A:6004–6016. doi: 10.1007/s11661-016-3728-8
21.
ChenB, LiangJ, KangT, A study of the optimum quenching temperature of steels with various hot rolling microstructures after cold rolling, quenching and partitioning treatment. Metals (Basel). 2018;8:579–591. doi: 10.3390/met8080579
22.
OlsonGB, CohenM.Kinetic of strain-induced martensitic nucleation. Metal Trans A. 1975;6:791–795. doi: 10.1007/BF02672301
