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Effect of austenisation temperature on bainite transformation below martensite starting temperature

Journal Article


Abstract


  • Effects of austenisation temperature on martensite and bainite transformation behaviour, microstructure, and mechanical properties of a bainitic steel austempered below martensite starting temperature were investigated in this study. Results show that the amount of athermal martensite gradually increased with the increase of austenisation temperature, whereas the amounts of bainite and retained austenite initially increased and then decreased, resulting in the trend of the first increase and then decrease in the product of tensile strength and elongation. In addition, the transformation rate of isothermal bainite after athermal martensite formation revealed a trend of deceleration and then acceleration with austenisation temperature at the beginning period. Moreover, the size of bainite plates decreased first and then increased with austenisation temperature.

UOW Authors


  •   Tian, Junyu (external author)
  •   Xu, Guang (external author)
  •   Jiang, Zhengyi
  •   Yuan, Qing (external author)
  •   Chen, Guanghui (external author)
  •   Hu, Haijiang (external author)

Publication Date


  • 2019

Citation


  • Tian, J., Xu, G., Jiang, Z., Yuan, Q., Chen, G. & Hu, H. (2019). Effect of austenisation temperature on bainite transformation below martensite starting temperature. Materials Science and Technology, 35 (13), 1539-1550.

Scopus Eid


  • 2-s2.0-85070781900

Number Of Pages


  • 11

Start Page


  • 1539

End Page


  • 1550

Volume


  • 35

Issue


  • 13

Place Of Publication


  • United Kingdom

Abstract


  • Effects of austenisation temperature on martensite and bainite transformation behaviour, microstructure, and mechanical properties of a bainitic steel austempered below martensite starting temperature were investigated in this study. Results show that the amount of athermal martensite gradually increased with the increase of austenisation temperature, whereas the amounts of bainite and retained austenite initially increased and then decreased, resulting in the trend of the first increase and then decrease in the product of tensile strength and elongation. In addition, the transformation rate of isothermal bainite after athermal martensite formation revealed a trend of deceleration and then acceleration with austenisation temperature at the beginning period. Moreover, the size of bainite plates decreased first and then increased with austenisation temperature.

UOW Authors


  •   Tian, Junyu (external author)
  •   Xu, Guang (external author)
  •   Jiang, Zhengyi
  •   Yuan, Qing (external author)
  •   Chen, Guanghui (external author)
  •   Hu, Haijiang (external author)

Publication Date


  • 2019

Citation


  • Tian, J., Xu, G., Jiang, Z., Yuan, Q., Chen, G. & Hu, H. (2019). Effect of austenisation temperature on bainite transformation below martensite starting temperature. Materials Science and Technology, 35 (13), 1539-1550.

Scopus Eid


  • 2-s2.0-85070781900

Number Of Pages


  • 11

Start Page


  • 1539

End Page


  • 1550

Volume


  • 35

Issue


  • 13

Place Of Publication


  • United Kingdom