The Study of a Drop of Plasticity Behavior of the As-Cast Low Carbon Steels in γ → α Transformation Region

Authors

  • Antonín Ševčík Institute of Material Research (SAS)
  • Jarmila Ševčíková Dept. of Materials Science, Faculty of Metallurgy, Technical University

Keywords:

low carbon steels, as-cast state, hot ductility, γ → α transformation, austenite grain size, effect of trace elements, intensity of R.A. drop

Abstract

Plasticity degradation in the region of γ → α transformation was studied on experimental material comprising 24 commercially produced low carbon steels.  Specimens were high frequency heated under protected argon atmosphere and the experiments were realized by tensile tests at constant testing conditions. The main aim of the work was to quantify the plasticity drop evaluation by statistical analyses of the reduction of area values. A considerable influence of the austenite grain size and/or boron on the intensity of plasticity drop was demonstrated. Temperature of the plasticity degradation, which was up to 323°C higher than the theoretical γ → α temperature, increased without the embrittlement effect of the proeutectoid ferrite on the austenite grain boundaries but as well as the increase of the content of trace elements, particularly of arsenic. Attention was also given to study the morphology of fractures formed in the temperature region of plasticity degradation.

Downloads

Download data is not yet available.

References

Mintz, B. 2000. Ironmaking and Steelmaking. 27 : 343 – 347.

Kato,T., et al. 2003. Prevention of slab surface transverse cracking by ISIJ International. 43 : 1742 – 1750.

Chimani, C.M. and Morwald, K. 1999. Micromechanical investigation of the hot ductility ISIJ International. 39 : 1194 – 1197.

Yin, H. et al. 1998. Determination of free energy of delta-ferrite/gamma-austenite interphase boundary of low carbon steels by in-situ observation ISIJ International. 38 : 794 – 801.

Takeuchi, H. and Brimacombe, J.K. 1985. Met. Trans. B. 16B : 605 – 614

Fujda, M. 2003, J. Met. Mater. Miner. 12 : 27 – 31.

Abe,T. et al. 1990, ISIJ International. 30 : 444 – 450.

Nagasaki, C. and Kihara, J. 1997. Effect of copper and tin on hot ductility of ultra-low ISIJ International. 37 : 523 – 530

Nagasaki, C. and Kihara, J. 1999. Evaluation of intergranular embrittlement of a low carbon steel in austenite temperature range ISIJ International. 39 : 75 – 83.

Suzuki, H. G., Nishimura, S. and Yamaguchi, S. 1982. Transactions ISIJ. 22 : 48 – 54.

Downloads

Published

2022-08-19

How to Cite

[1]
A. Ševčík and J. Ševčíková, “The Study of a Drop of Plasticity Behavior of the As-Cast Low Carbon Steels in γ → α Transformation Region”, J Met Mater Miner, vol. 15, no. 2, pp. 25–29, Aug. 2022.

Issue

Vol. 15 No. 2 (2005)

Section

Original Research Articles

License

Copyright (c) 2005 The Journal of Metals, Materials and Minerals (JMMM)

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Authors who publish in this journal agree to the following terms:

    1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.

 

    1. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.