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TRIP Steel Deformation Behavior by Neutron Diffraction

Published online by Cambridge University Press:  02 May 2013

Stefanus Harjo ,
Noriyuki Tsuchida ,
Wu Gong ,
Jun Abe  and
Kazuya Aizawa
Stefanus Harjo
Affiliation:
J-PARC Center, Japan Atomic Energy Agency, Shirane 2-4, Shirakata, Tokaimura, Nakagun, Ibaraki, 319-1118, Japan
Noriyuki Tsuchida
Affiliation:
Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
Wu Gong
Affiliation:
J-PARC Center, Japan Atomic Energy Agency, Shirane 2-4, Shirakata, Tokaimura, Nakagun, Ibaraki, 319-1118, Japan
Jun Abe
Affiliation:
J-PARC Center, Japan Atomic Energy Agency, Shirane 2-4, Shirakata, Tokaimura, Nakagun, Ibaraki, 319-1118, Japan
Kazuya Aizawa
Affiliation:
J-PARC Center, Japan Atomic Energy Agency, Shirane 2-4, Shirakata, Tokaimura, Nakagun, Ibaraki, 319-1118, Japan
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Abstract

Deformation behaviors of two TRIP-type multiphase steels with different carbon contents were studied by in situ neutron diffraction measurement during tensile deformation at RT. The tensile test was conducted in a step-load controlling manner during the elastic region, and in a continuous manner with a constant crosshead speed by an initial strain rate of 1.8×10-5 s-1 during the plastic region. Austenite grains were observed to bear higher phase stresses than ferrite grains in both steels. Austenite peak intensities started to decrease at the onsets of plastic deformation in both steels, showing the occurrence of stress induced martensitic transformations. Martensite peaks were carefully analyzed to estimate phase strains, and as the results martensite grains were found to bear largest phase stresses during plastic deformation.

Keywords

neutron scatteringsteelstrength
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1528: Symposium VV – Advanced Materials Exploration with Neutrons and Synchrotron X-Rays , 2013 , mrsf12-1528-vv08-02
Copyright
Copyright © Materials Research Society 2013

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References

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