Assessment of recovery and recrystallisation behaviours of cold rolled IF steel through non-destructive electromagnetic characterisation

Roy, Rajat K and Dutta, Siuli and Panda, A K and Rajinikanth, V and Das, Swapan K and Mitra, A and Strangwood, M and Davis, C L (2018) Assessment of recovery and recrystallisation behaviours of cold rolled IF steel through non-destructive electromagnetic characterisation. Philosophical Magazine, 98 (1.632). pp. 1933-1944.

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Abstract

The recovery and recrystallisation behaviours of cold rolled IF steel have been investigated by destructive (optical microscopy and hardness) and non-destructive electromagnetic sensor, (which allows direct measurement of strip samples with no surface preparation) techniques. The onset and completion of recrystallisation are clearly monitored through destructive techniques of optical microscopy and hardness measurements. The nucleation of new recrystallised grains is observed in the sample annealed at 600 °C/15 min, while completion of recrystallisation takes place at 700 °C/15 min. The destructive techniques are not very accurate in monitoring recovery, for example, changes in hardness of <20% are seen. In contrast, the magnetic properties of annealed steel show the onsets of both recovery and recrystallisation, with recovery accounting for ≈60% change in the coercivity value. Therefore, the measurement of magnetic softening through an electromagnetic sensor acts a crucial role for understanding recovery and recrystallisation behaviours of steels during industrial processing. The present investigation is aimed not only for controlling product quality but also saving characterisation time through off line monitoring during steel processing at industry.

Item Type:Article
Official URL/DOI:https://www.tandfonline.com/loi/tphm20
Uncontrolled Keywords:Hardness; microstructure; recrystallisation; magnetic properties; electron microscopy
Divisions:Material Science and Technology
ID Code:7844
Deposited By:Dr Rajat Roy
Deposited On:31 Jul 2018 09:41
Last Modified:31 Jul 2018 09:41

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