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

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:
 [1];  [1]; ORCiD logo [2];  [1];  [1]
  1. Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Madrid (Spain). Materalia Research Group, Physical Metallurgy Dept.
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
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.
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. doi:10.1016/j.scriptamat.2019.01.036.
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. doi:10.1016/j.scriptamat.2019.01.036.
@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}
}

Journal Article:
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This content will become publicly available on January 30, 2020
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