In-Situ Neutron Diffraction Study of the Deformation Behaviour of Two High-Manganese Austenitic Steels

Abstract:

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In-situ neutron diffraction experiments under tensile loading were carried out to study the micromechanical behaviour of two iron-manganese based steels, a TWIP (twinning induced plasticity) steel with 30 wt% Mn and a TRIP steel (transformation induced plasticity) with 20 wt% Mn. The former was loaded to 31.3% strain and the latter to 20% strain. The 30 wt.% Mn steel had a fully austenitic microstructure which remained stable over the loading range studied, while stress induced austenite to α´- and ε-martensite transformations occur in the 20 wt.% Mn steel which initially contained an α´-martensite in addition to the austenite. The evolution of lattice strains under tensile loading differs between the two steels, reflected their different plastic deformation mechanisms. A stronger grain-orientation dependent behaviour is observed during deformation for the 20 wt.% Mn in contrast to the 30wt.% Mn steel.

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Periodical:

Edited by:

Paolo Scardi and Cristy L. Azanza Ricardo

Pages:

474-479

DOI:

10.4028/www.scientific.net/MSF.681.474

Citation:

R. L. Peng et al., "In-Situ Neutron Diffraction Study of the Deformation Behaviour of Two High-Manganese Austenitic Steels", Materials Science Forum, Vol. 681, pp. 474-479, 2011

Online since:

March 2011

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$35.00

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