The Influence of the Substitution of Si by Al on the Properties of Cold Rolled C-Mn-Si TRIP Steels.

• Meyer M. De

  Laboratory for Iron and Steelmaking, University of Ghent

• Vanderschueren D.

  OCAS NV, Research Centre of the SIDMAR Group, ARBED Flat Rolled Products Division

• Cooman B. C. De

  Laboratory for Iron and Steelmaking, University of Ghent

Abstract

The effect of the substitution of silicon by aluminium on the mechanical properties and the microstructure of cold rolled C-Mn-Si TRIP steels was investigated for different continuous annealing cycles. <br>The mechanical properties were evaluated using tensile testing. It was seen that the Al alloyed steel had very good mechanical properties with an improved formability compared to the conventional C-Mn-Si TRIP steel. The strain hardening behaviour was studied in detail. All the investigated specimens showed a very high n value but their strain dependence was different. For the conventional C-Mn-Si TRIP steel the maximum n value was reached at low strain, while the Al substituted TRIP steel showed a gradual increase of the n value. The latter effect resulted in a larger uniform elongation for the C-Mn-Al-Si TRIP steel.<br> Investigation of the microstructure using color etching and scanning electron microscopy revealed that the Al alloyed steel composition contained a larger amount of bainite with a finer structure than the C-Mn-Si TRIP steel. Furthermore, XRD measurements showed that the Al substitution resulted in a larger volume fraction of retained austenite.

Journal

• ISIJ International

  ISIJ International 39 (8), 813-822, 1999

  The Iron and Steel Institute of Japan

Keywords

• TRIP steels
• aluminium
• silicon
• retained austenite
• bainite
• strain hardening
• carbon content

Details

• CRID: 1390001206452449536
• NII Article ID: 10002464092
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.39.813
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/09151559
• ISSN: http://id.crossref.org/issn/00211583
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/39/8/39_8_813/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed