Hot ductility of high Al TWIP steels containing Nb and Nb-V

Qaban, Abdullah; Mintz, B.; Kang, S. E.; Naher, Sumsun

doi:10.1080/02670836.2017.1309097

Cited by 21 publications

(16 citation statements)

References 30 publications

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“…Precipitation kinetics of AlN occurs during cooling while their growth rate and distribution are dependant on the thermal history e.g. slower cooling rate was found to enhance growth of particles [16]. In the current work, the majority of AlN particles were found along the grain boundaries in the form of rod and plate-like particles as presented in Fig.…”

Section: Resultssupporting

confidence: 49%

Influence of Al content on the corrosion resistance of micro-alloyed hot rolled steel as a function of grain size

Qaban¹,

Naher²

2018

AIP Conference Proceedings

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High-strength low-alloy steel (HSLA) has been widely used in many applications involving automobiles, aerospace, construction, and oil and gas pipelines due to their enhanced mechanical and chemical properties. One of the most critical elements used to improve these properties is Aluminium. This work will explore the effect of Al content on the corrosion behaviour of hot rolled high-strength low-alloy steel as a function of grain size. The method of investigation employed was weight loss technique. It was obvious that the increase in Al content enhanced corrosion resistance through refinement of grain size obtained through AlN precipitation by pinning grain boundaries and hindering their growth during solidification which was found to be beneficial in reducing corrosion rate.

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Section: Resultssupporting

confidence: 49%

Influence of Al content on the corrosion resistance of micro-alloyed hot rolled steel as a function of grain size

Qaban¹,

Naher²

2018

AIP Conference Proceedings

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“…The current authors [8] reported that adding 0.16%Al to HSLA steels enhances toughness considerably without impairing strength. A further study [9] revealed that the addition of 0.018%Nb is beneficial to improve the strength through grain size refinement and precipitation hardening [10,11]. Moreover, mechanical properties are affected by the processing conditions including the rolling condition that has a marked effect on properties, in which controlled rolling is known to further increase strength and toughness in comparison with hot rolling, but the effect of cooling rate after rolling must be taken care of [12].…”

Section: Introductionmentioning

confidence: 99%

The effect of Al and Nb contents, cooling rate and rolling condition on the microstructure and corrosion behaviour of HSLA steel

Qaban

Mohmed

Quazi

et al. 2020

Materials Today Communications

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The effect of the addition of aluminium and niobium, and processing conditions, including cooling rate and rolling condition, on the corrosion behaviour of HSLA steel in 10 wt% sulphuric acid environment has been investigated. The experimental procedures included electrochemical corrosion techniques using potentiodynamic and electrochemical impedance spectroscopy, as well as weight loss method. The microstructure was examined using optical and scanning electron microscopes in order to investigate the effect of the microstructural features on the corrosion behaviour. Surface films were evaluated by X-ray photoelectron spectroscopy (XPS) to identify the corrosion products formed on the surface. The results showed that increasing the Al content enhanced the corrosion resistance through obstructing pitting attack on the surface by the refinement of grain boundary carbides and the formation of a protective passive layer rich in carbide and oxide compounds. The combination of both Al and Nb promoted the corrosion resistance further, by enriching the passive layer with Nb and higher levels of carbide and oxide compounds, despite the presence of martensite and grain size refinement by niobium carbonitride (NbCN). Increasing the cooling rate reduced the corrosion resistance due to the refinement of grain size, giving a higher density of grain boundaries that act as active sites, besides increasing the level of carbide distribution in the microstructure. Controlled rolling offered higher corrosion resistance than hot rolling, independent of the composition, because of the absence of martensite, the presence of lowangle boundary and the refinement of grain boundary carbides provided by controlled rolling.

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“…Hence, in addition to the spectral lines from S, Mn, O, and Fe, there are also signals from Ce and La on the analyzed spectrograms (mischmetal was added during the melting process). The problem of non-metallic inclusions in high-manganese steels was analyzed in detail in works [28][29][30][31]. It is clear that that there is a relationship between numerous non-metallic inclusions and fracture behavior.…”

Section: Resultsmentioning

confidence: 99%

Effect of Grain Size on the Microstructure and Strain Hardening Behavior of Solution Heat-Treated Low-C High-Mn Steel

et al. 2020

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The low-carbon high-Mn austenitic steel microalloyed with titanium was investigated in this work. The steel was solution heat-treated at different temperatures in a range from 900 to 1200 °C. The aim was to receive a different grain size before the static tensile test performed at room temperature. The samples of different grain sizes showed the different strain hardening behavior and resulting mechanical properties. The size of grain diameter below 19 μm was stable up to 1000 °C. Above this temperature, the very enhanced grain growth took place with the grain diameter higher than 220 μm at 1200 °C. This huge grain size at the highest temperature resulted in the premature failure of the sample showing the lowest strength properties at the same time. Correlations between the grain size, the major strengthening mechanism, and fracture behavior were addressed. The relationships were assessed based on microstructural investigations and fractography tests performed for the deformed samples. The best combination of strength and ductility was found for the samples treated at 1000–1100 °C.

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Hot ductility of high Al TWIP steels containing Nb and Nb-V

Cited by 21 publications

References 30 publications

Influence of Al content on the corrosion resistance of micro-alloyed hot rolled steel as a function of grain size

Influence of Al content on the corrosion resistance of micro-alloyed hot rolled steel as a function of grain size

The effect of Al and Nb contents, cooling rate and rolling condition on the microstructure and corrosion behaviour of HSLA steel

Effect of Grain Size on the Microstructure and Strain Hardening Behavior of Solution Heat-Treated Low-C High-Mn Steel

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