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The effect of chromium addition on the strain ageing and recrystallisation behaviour of low carbon steel

Conference Paper


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Abstract


  • The strain ageing and recrystallisation behaviour of conventional low carbon A06 steel was

    compared with those containing varying amounts of chromium (0.26, 0.52 and 0.74 wt.%). The results

    show that the A06 steel undergoes four stages of strain ageing: (i) the pinning by solute atoms of

    dislocations generated during pre-strain, (ii) the generation of fresh dislocations from grain

    boundaries, (iii) the onset of precipitation and, (iv) the inhibition of dislocation generation from grain

    boundaries due to pinning by carbon segregation. On the other hand, the chromium containing steels

    only exhibit the fIrst three stages of strain ageing. An approximately twofold reduction in the rate of

    strain ageing was observed in the 0.74Cr steel as compared to the A06 steel. The above is directly

    attributed to the reduction of carbon concentration in ferrite due to the enrichment of iron carbides by

    chromium and to the formation of alloy carbides which slows their dissolution upon coiling. The

    addition of chromium signifIcantly delays the recrystallisation process and affects the morphology of

    the recrystallised grains by reSUlting in larger aspect ratios than A06 steel.

Publication Date


  • 2012

Citation


  • Pereloma, E., Bata, V. & Gazder, A. A. (2012). The effect of chromium addition on the strain ageing and recrystallisation behaviour of low carbon steel. In T. Furuhara, H. Numakura & K. Ushioda (Eds.), 3rd International Symposium on Steel Science (ISSS 2012) (pp. 41-50). Japan: The Iron and Steel Institute of Japan.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2146&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1137

Start Page


  • 41

End Page


  • 50

Abstract


  • The strain ageing and recrystallisation behaviour of conventional low carbon A06 steel was

    compared with those containing varying amounts of chromium (0.26, 0.52 and 0.74 wt.%). The results

    show that the A06 steel undergoes four stages of strain ageing: (i) the pinning by solute atoms of

    dislocations generated during pre-strain, (ii) the generation of fresh dislocations from grain

    boundaries, (iii) the onset of precipitation and, (iv) the inhibition of dislocation generation from grain

    boundaries due to pinning by carbon segregation. On the other hand, the chromium containing steels

    only exhibit the fIrst three stages of strain ageing. An approximately twofold reduction in the rate of

    strain ageing was observed in the 0.74Cr steel as compared to the A06 steel. The above is directly

    attributed to the reduction of carbon concentration in ferrite due to the enrichment of iron carbides by

    chromium and to the formation of alloy carbides which slows their dissolution upon coiling. The

    addition of chromium signifIcantly delays the recrystallisation process and affects the morphology of

    the recrystallised grains by reSUlting in larger aspect ratios than A06 steel.

Publication Date


  • 2012

Citation


  • Pereloma, E., Bata, V. & Gazder, A. A. (2012). The effect of chromium addition on the strain ageing and recrystallisation behaviour of low carbon steel. In T. Furuhara, H. Numakura & K. Ushioda (Eds.), 3rd International Symposium on Steel Science (ISSS 2012) (pp. 41-50). Japan: The Iron and Steel Institute of Japan.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2146&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1137

Start Page


  • 41

End Page


  • 50