A high-performance TRIP steel enhanced by ultrafine grains and hardening precipitates

Xie, Pan; Han, Ming-chuan; Wu, C.L.; Yin, Yuchen; Zhu, K.; Shen, Ruohan; Chen, J.H.

doi:10.1016/j.matdes.2017.04.063

Cited by 27 publications

(4 citation statements)

References 37 publications

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“…A low-alloy steel with the chemical composition (wt-%) of 0.249C–1.25Si–1.16Mn–0.905Al was used in this work, which is suitable for TRIP heat treatment [25,26]. The hot rolling operations were performed at 1050°C up to the reductions in the thickness of 20%, 35%, 50%, and 90%.…”

Section: Methodsmentioning

confidence: 99%

Effects of hot rolling and homogenisation treatment on low alloy steel ingot

Baharvand

Zanganeh

Mirzadeh

et al. 2020

Materials Science and Technology

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The effects of hot rolling and homogenisation treatment on the microstructure and mechanical properties of low-alloy transformation-induced plasticity (TRIP) steel were studied. With increasing the reduction in thickness during rolling, the band spacing and the average ferrite grain size decreased with the consequent enhancement of mechanical properties. Homogenisation treatment resulted in the gradual fading of the banded morphology, more homogeneous microhardness profile, and twice total elongation compared to the as-cast counterpart. The experimentally observed homogenisation time judged by the disappearance of the banded structure was in agreement with the obtained values based on the band spacing and elemental analysis. This work provided scientific evidence for the assumptions used to derive the homogenisation formulae.

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Section: Methodsmentioning

confidence: 99%

Effects of hot rolling and homogenisation treatment on low alloy steel ingot

Baharvand

Zanganeh

Mirzadeh

et al. 2020

Materials Science and Technology

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“…In addition, Figure 12(A) shows the comparison of tensile properties obtained in this work with those specified in ASTM A1088 for AHSS grades as CP (complex phase), DP (dual phase) and TRIP. The chart also includes mechanical properties reported in [27][28][29][30][31] for wrought TRIP-assisted steels. In general, the mechanical properties obtained in this work surpass those required for AHSS grades, i.e.…”

Section: Bf Microstructures and Mechanical Propertiesmentioning

confidence: 99%

Mechanical properties of a carbide-free bainitic cast steel with dispersed free ferrite

Tenaglia

Boeri

Basso

2020

Materials Science and Technology

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A high silicon, medium carbon cast steel was designed and heat-treated in order to develop microstructures composed of carbide-free bainite and small amounts of free ferrite, with the aim of obtaining high strength cast steels with improved ductility. Because of microsegregation, it was observed that ferrite present in partially austenitised samples is mostly present at the highly alloyed zones, creating an interconnected network even for low proportions of this phase. Despite the coarse solidification structure and marked microsegregation in the cast steel, the mechanical properties obtained for both fully bainitic and bainitic-ferritic microstructures largely satisfy the minimum standard requirements for high strength cast steels and are similar to those reported for wrought steels of similar microstructures.

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“…Processing routes developed to improve the mechanical properties or to lower the cost, include cold rolling followed by intercritical annealing [4], hot rolling/thermo-mechanical processing [5,6], warm rolling [7], fast heating [8] or strip casting [9,10]. Enhancing the mechanical properties can generally be achieved by microstructure refinement [11] and tuning the RA stability [3,12]. It is well known that gradual transformation of RA to martensite during straining leads to the best combination of mechanical properties [3].…”

Section: Introductionmentioning

confidence: 99%