In the present study, a steel with the chemical composition of Fe–0·15 wt-C–5 wt-Mn–3 wt-Al was designed. Its microstructure and mechanical properties were examined by optical microscopy, scanning electron microscopy and mechanical tests. It was found that hot rolling in the dual phase region of ferrite and austenite at high temperature resulted in microlaminated dual phase microstructure. An excellent combination of high strength (∼1200 MPa) and ultrahigh impact toughness (∼400 J) of the microlaminated dual phase steel was obtained. Based on the measurement of the phase volume fraction and the analysis of the fractography, it was shown that the high strength was mainly dependent on the high martensite volume fraction, while the ultrahigh impact toughness was attributed to the microlaminated microstructure.
TavaresSSM, PedrozaPD, TeodósioJR and GurovaT: ‘Mechanical properties of a quenched and tempered dual phase steel’, Scr. Mater., 1999, 40, 887–892.
2.
ChaoYJ, WardJDJr. and SandsRG: ‘Charpy impact energy, fracture toughness and ductile-brittle transition temperature of dual-phase 590 steel’, Mater. Des., 2007, 28, 551–557.
3.
PozueloM, CarreñoF and RuanoOA: ‘Delamination effect on the impact toughness of an ultrahigh carbon–mild steel laminate composite’, Compos. Sci. Technol., 2006, 66, 2671–2676.
4.
YinFX, LiL, TanakaY, KishimotoS and NagaiK: ‘Hot rolling bonded multilayered composite steels and varied tensile deformation behaviour’, Mater. Sci. Technol., 2012, 28, 783–787.
5.
InoueJ, NambuS, IshimotoY and KosekiT: ‘Fracture elongation of brittle/ductile multilayered steel composites with a strong interface’, Scr. Mater., 2008, 59, 1055–1058.
6.
LhuissierP, InoueJ and KosekiT: ‘Strain field in a brittle/ductile multilayered steel composite’, Scr. Mater., 2011, 64, 970–973.
7.
YangYH, LinGY, ChenDD, ZhangR, WangDZ and QiF: ‘Fabrication of Al–Cu laminated composites by diffusion rolling procedure’, Mater. Sci. Technol., 2014, 30, 973–976.
8.
KavaranaFH, RavichandranKS and SahaySS: ‘Nanoscale steel-brass multilayer laminates made by cold rolling: microstructure and tensile properties’, Scr. Mater., 2000, 42, 947–954.
9.
KaabiA, BienvenuY, RyckelynckD, PrévondL and PierreB: ‘Architectured bimetallic laminates by roll bonding: bonding mechanisms and applications’, Mater. Sci. Technol., 2014, 30, 782–790.
10.
WangX, FangB, ZhaoW and ZhangY: ‘Numerical analysis of layered surface mechanical attrition treated 304SS with nanograin layer based on cohesive model’, Mater. Sci. Technol., 2014, 30, 241–247.
ParkS.-J, HwangB, LeeKH, LeeT.-H, SuhD.-W and HanHN: ‘Microstructure and tensile behavior of duplex low-density steel containing 5 mass aluminium’, Scr. Mater., 2013, 68, 365–369.
13.
SuhD.-W, ParkS.-J, LeeT.-H, OhC.-S and KimS.-J: ‘Influence of Al addition on the microstructural evolution and mechanical behavior of low carbon, manganese transformation-induced plasticity steel’, Metall. Mater. Trans. A, 2010, 41A, 397–408.
FangH.-S, FengC, ZhengY.-K, YangZ.-G and BaiB.-Z: ‘Creation of Air-cooled Mn series bainitic steels’, J. Iron. Steel Res. Int., 2008, 15, 1–9.
16.
CalcagnottoM, AdachiY, PongeD and RaabeD: ‘Deformation and fracture mechanisms in fine- and ultrafine-grained ferrite/martensite dual-phase steels and the effect of aging’, Acta Mater., 2011, 59, 658–670.
17.
AkbarpourMR and EkramiA: ‘Effect of ferrite volume fraction on work hardening behavior of high bainite dual phase (DP) steels’, Mater. Sci. Eng. A, 2008, A477, 306–310.
18.
MovahedP, KolahgarS, MarashiSPH, PouranvariM and ParvinN: ‘The effect of intercritical heat treatment temperature on the tensile properties and work hardening behavior of ferrite-martensite dual phase steel sheets’, Mater. Sci. Eng. A, 2009, A518, 1–6.
19.
SunX, ChoiKS, SoulamiA, LiuWN and KhaleelMA: ‘On key factors influencing ductile fractures of dual phase (DP) steels’, Mater. Sci. Eng. A, 2009, A526, 140–149.
20.
MaMT and WuBR: ‘Dual phase steel – physical and mechanical metallurgy’, 2nd edn, 181–183; 2009, Beijing, Metallurgical Industry Press.
21.
KadkhodapourJ, ButzA and Ziaei RadS: ‘Mechanisms of void formation during tensile testing in a commercial, dual-phase steel’, Acta Mater., 2011, 59, 2575–2588.
22.
Avramovic-CingaraG, OsoskovY, JainMK and WilkinsonDS: ‘Effect of martensite distribution on damage behaviour in DP600 dual phase steels’, Mater. Sci. Eng. A, 2009, A516, 7–16.
23.
AhmadE, ManzoorT and HussainN: ‘Thermomechanical processing in the intercritical region and tensile properties of dual-phase steel’, Mater. Sci. Eng. A, 2009, A508, 259–265.
24.
SunSJ and PughM: ‘Properties of thermomechanically processed dual-phase steels containing fibrous martensite’, Mater. Sci. Eng. A, 2002, A335, 298–308.
25.
FereiduniE and Ghasemi BanadkoukiSS: ‘Improvement of mechanical properties in a dual-phase ferrite–martensite AISI4140 steel under tough-strong ferrite formation’, Mater. Des., 2014, 56, 232–240.
26.
DengX, WangZ, TianY, FuT and WangG: ‘An investigation of mechanical property and three-body impact abrasive wear behavior of a 0·27 C dual phase steel’, Mater. Des., 2013, 49, 220–225.
27.
ZhouM, DuL.-X and LiuX.-H: ‘Relationship among microstructure and properties and heat treatment process of ultra-high strength X120 pipeline steel’, J. Iron. Steel Res. Int., 2011, 18, 59–64.
28.
MaropoulosS, RidleyN, KechagiasJ and KaragiannisS: ‘Fracture toughness evaluation of a H.S.L.A. steel’, Eng. Fract. Mech., 2004, 71, 1695–1704.
29.
JooMS, SuhD.-W, BaeJH and BhadeshiaHKDH: ‘Role of delamination and crystallography on anisotropy of Charpy toughness in API-X80 steel’, Mater. Sci. Eng. A, 2012, A546, 314–322.
30.
VenkatsuryaPKC, JiaZ, MisraRDK, MulhollandMD, ManoharM and HartmannJEJr: ‘Understanding mechanical property anisotropy in high strength niobium - microalloyed linepipe steels’, Mater. Sci. Eng. A, 2012, A556, 194–210.
31.
TanguyB, LuuTT, PerrinG, PineauA and BessonJ: ‘Plastic and damage behaviour of a high strength X100 pipeline steel: experiments and modelling’, Int. J. Pres. Ves. Pip., 2008, 85, 322–335.
32.
DhuaSK and SenSK: ‘Effect of direct quenching on the microstructure and mechanical properties of the lean-chemistry HSLA-100 steel plates’, Mater. Sci. Eng. A, 2011, A528, 6356–6365.
33.
JafariM, KimuraY and TsuzakiK: ‘Enhanced upper shelf energy by ultrafine elongated grain structures in 1100 MPa high strength steel’, Mater. Sci. Eng. A, 2012, A532, 420–429.
34.
KangJ, WangC and WangGD: ‘Microstructural characteristics and impact fracture behavior of a high-strength low-alloy steel treated by intercritical heat treatment’, Mater. Sci. Eng. A, 2012, A553, 96–104.
35.
MilititskyM, MatlockDK, RegullyA, DewispelaereN, PenningJ and HanninenH: ‘Impact toughness properties of nickel-free austenitic stainless steels’, Mater. Sci. Eng. A, 2008, A496, 189–199.
36.
SaeidiN and EkramiA: ‘Impact properties of tempered bainite–ferrite dual phase steels’, Mater. Sci. Eng. A, 2010, A527, 5575–5581.
37.
YangM, ChaoYJ, LiXD and TanJZ: ‘Splitting in dual-phase 590 high strength steel plates: Part I. Mechanisms’, Mater. Sci. Eng. A, 2008, A497, 451–461.
38.
YangM, ChaoYJ, LiXD, ImmelD and TanJZ: ‘Splitting in dual-phase 590 high strength steel plates: Part II. Quantitative analysis and its effect on Charpy impact energy’, Mater. Sci. Eng. A, 2008, A497, 462–470.
39.
HassanHA: ‘Effect of mixed mode I/II on fracture behaviour of laminated metal matrix composites’Mater. Sci. Technol., 2011, 27, 1170–1176.
