The Structure Dependence of Deformation Behavior of Transformation-Induced Plasticity–Assisted Steel Monitoring by In-Situ Neutron Diffraction

Symposium: Neutron and X-Ray Studies for Probing Materials Behavior

Abstract

Tensile deformation behavior of two transformation-induced plasticity (TRIP)–assisted multiphase steels with slightly different microstructures due to different thermomechanical treatment conditions applied was investigated by in-situ neutron diffraction. The steel with lower austenite volume fraction (f γ  = 0.04) and higher volume fraction of needlelike bainite in the α-matrix exhibits higher yield stress (sample B, 600 MPa) but considerably lower elongation in comparison to the steel with higher austenite volume fraction (f γ  = 0.08), granular bainite, and polygonal ferrite matrix (sample A, 500 MPa). The neutron diffraction results have shown that the applied tensile load is redistributed at the yielding point in such a way that the retained austenite bears a significantly larger load than the α matrix during the TRIP-assisted steel deformation.

Notes

Acknowledgments

The authors gratefully acknowledge the support from the ISIS RAL facility (Project No. RB620316) and the FP6 Marie Curie Research Training Network MULTIMAT (MRTN-CT-2004-505226). The financial support from the project of the Scientific Grant Agency of Slovak Republic (Contract No. MS 1/3218/06) is gratefully acknowledged.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2008

Authors and Affiliations

  • O. Muránsky
    • 1
    • 2
  • P. Šittner
    • 3
  • J. Zrnik
    • 4
    • 5
  • E.C. Oliver
    • 6
  1. 1.Nuclear Physics Institute v.v.i68 RezCzech Republic
  2. 2.Australian Nuclear Science and Technology Organisation, PMB 1MenaiAustralia
  3. 3.Institute of PhysicsPragueCzech Republic
  4. 4.COMTES FHTPlzenCzech Republic
  5. 5.Technical University of KosiceKosiceSlovak Republic
  6. 6.ISIS FacilitySTFC Rutherford Appleton LaboratoryChilton, DidcotUnited Kingdom

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