2016
DOI: 10.1080/02670836.2015.1130364
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Properties assessment of the first industrial coils of low-density duplex δ-TRIP steel

Abstract: A novel low-density steel with high aluminium content was, for the first time, manufactured as coils by the conventional industry process consisting of continuous casting followed by hot-rolling and cold-rolling. The duplex δ-TRIP microstructure, comprising a mixture of blocky retained austenite and both δ- and α-ferrite, was then produced by laboratory-scale heat treatments. The microstructure generation was achieved by an intercritical annealing followed by direct quenching, which was the same process as tha… Show more

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Cited by 10 publications
(11 citation statements)
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“…The δ-TRIP alloys perform UTS × TEL exceeding 30 GPa %. In addition, they have a density approximately 5% lower than conventional automotive steels [30][31][32][33][34][35]. The tensile curves exhibit potential for good formability (Figure 1) [32,34,35].…”
Section: δ-Tripmentioning
confidence: 99%
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“…The δ-TRIP alloys perform UTS × TEL exceeding 30 GPa %. In addition, they have a density approximately 5% lower than conventional automotive steels [30][31][32][33][34][35]. The tensile curves exhibit potential for good formability (Figure 1) [32,34,35].…”
Section: δ-Tripmentioning
confidence: 99%
“…The first industrial coils of δ-duplex TRIP alloy were manufactured in 2014 [17]. The δ-duplex TRIP achieve 900 MPa strength combined with approximate 20% of total elongation, similar to DP780 steels [30]. However, the very low R -value lower than 0.4 and severe δ-ferrite texture lead to very poor formability compared to DP780 [17].…”
Section: Tensile Properties and Formability Of Novel Ahss Gradesmentioning
confidence: 99%
“…This can further stabilise retained austenite. In addition, Al can similarly accelerate the formation of bainite [1,16,17] and facilitate formation of δ-TRIP steels [18,19]. δ-TRIP steels have been recently proposed as a new group of advanced high strength steels for automotive industries [20].…”
Section: Introductionmentioning
confidence: 99%
“…It is expected that δ-TRIP steel will become a useful material for automotive structural parts because of its low density, moderate product of ultimate tensile strength (UTS) and total elongation (TE), and excellent welding properties [2,3]. Many studies on the mechanical properties [4][5][6] and microstructure [6][7][8][9] have been reported. At present, the Al content of industrial aluminiumalloyed TRIP steel is generally 0.5-2 wt-%.…”
Section: Introductionmentioning
confidence: 99%