Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels

Vivas Mendez, Javier; De-Castro, David; Poplawsky, Jonathan D.; San-Martin, D; Capdevila, C.

doi:10.1016/j.scriptamat.2019.01.036

Title: Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels

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Abstract

It is well known the effectiveness of ausforming on increasing the dislocation density of fresh martensite. Here, this work demonstrates, using atom probe tomography, that this increase in the dislocation density has a strong influence on the nucleation of nanoprecipitates during tempering. Therefore, ausforming might be a powerful processing route for the two-fold improvement of ferritic/martensitic steels where creep resistance is of paramount importance. Firstly, ausforming refines the martensitic microstructure (high strength and toughness), and secondly, it increases the number density of thermally stable nanoprecipitates (creep resistance).

Authors:

Vivas Mendez, Javier ^[1]; De-Castro, David ^[1];

^[2]; San-Martin, D ^[1]; Capdevila, C. ^[1]

Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Madrid (Spain). Materalia Research Group, Physical Metallurgy Dept.
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)

Publication Date:: 2019-01-30

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC); Spanish Ministerio de Economía y Competitividad (MINECO)

OSTI Identifier:: 1493123

Grant/Contract Number:: AC05-00OR22725; BES-2014-069863

Resource Type:: Accepted Manuscript

Journal Name:: Scripta Materialia

Additional Journal Information:: Journal Volume: 164; Journal Issue: C; Journal ID: ISSN 1359-6462

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Vivas Mendez, Javier, De-Castro, David, Poplawsky, Jonathan D., San-Martin, D, and Capdevila, C. Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels.  United States: N. p., 2019. 
Web.  doi:10.1016/j.scriptamat.2019.01.036.

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                    Vivas Mendez, Javier, De-Castro, David, Poplawsky, Jonathan D., San-Martin, D, & Capdevila, C. Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels.  United States.  https://doi.org/10.1016/j.scriptamat.2019.01.036

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                    Vivas Mendez, Javier, De-Castro, David, Poplawsky, Jonathan D., San-Martin, D, and Capdevila, C. Wed .  
"Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels".  United States.  https://doi.org/10.1016/j.scriptamat.2019.01.036.  https://www.osti.gov/servlets/purl/1493123.

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@article{osti_1493123,

  title        = {Direct observation of creep strengthening nanoprecipitate formation in ausformed ferritic/martensitic steels},

  author       = {Vivas Mendez, Javier and De-Castro, David and Poplawsky, Jonathan D. and San-Martin, D and Capdevila, C.},

  abstractNote = {It is well known the effectiveness of ausforming on increasing the dislocation density of fresh martensite. Here, this work demonstrates, using atom probe tomography, that this increase in the dislocation density has a strong influence on the nucleation of nanoprecipitates during tempering. Therefore, ausforming might be a powerful processing route for the two-fold improvement of ferritic/martensitic steels where creep resistance is of paramount importance. Firstly, ausforming refines the martensitic microstructure (high strength and toughness), and secondly, it increases the number density of thermally stable nanoprecipitates (creep resistance).},

  doi          = {10.1016/j.scriptamat.2019.01.036},

  journal      = {Scripta Materialia},

  number       = C,

  volume       = 164,

  place        = {United States},

  year         = {2019},

  month        = {1}

}

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