Deformation Behavior of a Double Soaked Medium Manganese Steel with Varied Martensite Strength

Glover, Alexandra; Gibbs, Paul J.; Liu, Cheng; Brown, Donald W.; Clausen, Bjørn; Speer, John G.; De Moor, Emmanuel

doi:10.3390/met9070761

Deformation Behavior of a Double Soaked Medium Manganese Steel with Varied Martensite Strength

Journal Article · Mon Jul 01 00:00:00 EDT 2019 · Metals

DOI:https://doi.org/10.3390/met9070761· OSTI ID:1532420

Glover, Alexandra; Gibbs, Paul J.; Liu, Cheng; Brown, Donald W.; Clausen, Bjørn; Speer, John G.; De Moor, Emmanuel

The effects of athermal martensite on yielding behavior and strain partitioning during deformation is explored using in situ neutron diffraction for a 0.14C–7.14Mn medium manganese steel. Utilizing a novel heat treatment, termed double soaking, samples with similar microstructural composition and varied athermal martensite strength and microstructural characteristics, which composed the bulk of the matrix phase, were characterized. It was found that the addition of either as-quenched or tempered athermal martensite led to an improvement in mechanical properties as compared to a ferrite plus austenite medium manganese steel, although the yielding and work hardening behavior were highly dependent upon the martensite characteristics. Specifically, athermal martensite was found to promote continuous yielding and improve the work hardening rate during deformation. The results of this study are particularly relevant when considering the effect of post-processing thermal heat treatments, such as tempering or elevated temperature service environments, on the mechanical properties of medium manganese steels containing athermal martensite.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: Advanced Steel Processing and Products Research Center (ASPPRC); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1532420

Alternate ID(s):: OSTI ID: 1558073

Report Number(s):: LA-UR--19-25605; PII: met9070761

Journal Information:: Metals, Journal Name: Metals Journal Issue: 7 Vol. 9; ISSN 2075-4701; ISSN MBSEC7

Publisher:: MDPICopyright Statement

Country of Publication:: Switzerland

Language:: English

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