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Journal of Materials Science

, Volume 50, Issue 1, pp 279–286 | Cite as

Microstructural evolution and solidification cracking susceptibility of Fe–18Mn–0.6C–xAl steel welds

  • Jaehong Yoo
  • Bongyoon Kim
  • Younghwan Park
  • Changhee LeeEmail author
Original Paper

Abstract

In this work, the solidification behavior and solidification cracking of Fe–18Mn–0.6C–xAl (x = 1.49, 2.37, 4.79, 6.04 wt%) alloys were investigated. A longitudinal Varestraint test was applied to evaluate the solidification cracking tendency of Al-added high-Mn steel welds. In terms of total crack length and maximum crack length at 4 % applied strain, the solidification cracking susceptibility of high-Mn steel decreased with increasing Al content. Addition of Al suppressed the formation of low melting point eutectics (γ + (Fe,Mn)3C) along the grain boundaries during the final stage of solidification, which resulted in the decrease of solidification cracking tendency. The Al segregated extensively to the dendrite core opposite to Mn and C during solidification, which promoted the formation of δ ferrite. Further, the transition of the solidification sequence from the primary austenitic to primary ferritic mode provided a noticeable improvement in solidification cracking resistance in high-Mn steel welds similar to austenitic stainless steel welds.

Keywords

Ferrite Weld Metal Fusion Zone Solidification Mode Dendrite Core 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors would like to thank the POSCO Technical Research Laboratory for financial support of this research.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Jaehong Yoo
    • 1
  • Bongyoon Kim
    • 1
  • Younghwan Park
    • 2
  • Changhee Lee
    • 1
    Email author
  1. 1.Division of Materials Science and EngineeringHanyang UniversitySeoulRepublic of Korea
  2. 2.POSCO Technical Research LabPohangRepublic of Korea

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