Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion

M. Song; C. Sun; J. Jang; C. H. Han; T. K. Kim; K. T. Hartwig; X. Zhang

doi:10.1016/j.jallcom.2013.04.198

Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion

M. Song, C. Sun, J. Jang, C. H. Han, T. K. Kim, K. T. Hartwig, X. Zhang

Materials and Fuels Complex

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

Multiscale microstructure refinement of a 12Cr-ODS steel by equal channel angular extrusion (ECAE) was investigated by numerous microscopy techniques. The as-HIPped material showed a bimodal microstructure. Three types of second phase particles, including Y₂O₃, (Cr, Fe)₂₃C ₆ and Cr oxide, were observed. After ECAE, the large matrix grains and Cr rich particles were effectively refined, and yttrium oxide nanoparticles surrounding ultrafine grain boundaries were redistributed. Geometry change of nanoscale yttrium oxide particles was also observed. An increased hardening by ~35% was related to ECAE induced refinement of microstructures.

Original language	English
Pages (from-to)	247-256
Number of pages	10
Journal	Journal of Alloys and Compounds
Volume	577
DOIs	https://doi.org/10.1016/j.jallcom.2013.04.198
State	Published - 2013

Keywords

ECAE or ECAP
Ferritic steel
Microstructure
ODS steel
Oxide dispersion strengthening

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10.1016/j.jallcom.2013.04.198

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@article{77eaf82e86da4c5aa7c08e60a3f1a4c6,

title = "Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion",

abstract = "Multiscale microstructure refinement of a 12Cr-ODS steel by equal channel angular extrusion (ECAE) was investigated by numerous microscopy techniques. The as-HIPped material showed a bimodal microstructure. Three types of second phase particles, including Y2O3, (Cr, Fe)23C 6 and Cr oxide, were observed. After ECAE, the large matrix grains and Cr rich particles were effectively refined, and yttrium oxide nanoparticles surrounding ultrafine grain boundaries were redistributed. Geometry change of nanoscale yttrium oxide particles was also observed. An increased hardening by ~35% was related to ECAE induced refinement of microstructures.",

keywords = "ECAE or ECAP, Ferritic steel, Microstructure, ODS steel, Oxide dispersion strengthening",

author = "M. Song and C. Sun and J. Jang and Han, {C. H.} and Kim, {T. K.} and Hartwig, {K. T.} and X. Zhang",

note = "Funding Information: We acknowledge financial support from DOE-NEUP under Contract No. DE-AC07-05ID14517-00088120. Technical assistance on ECAE processing from Mr. Robert Barber is greatly appreciated. J. Jing acknowledges the support by the National Research Foundation of Korea (NRF) Grant funded by the Korean Ministry of Education, Science and Technology ( 2011-0031584 ). We also acknowledge the use of microscopes at the Microscopy and Imaging Center at Texas A&M University.",

year = "2013",

doi = "10.1016/j.jallcom.2013.04.198",

language = "English",

volume = "577",

pages = "247--256",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion

AU - Song, M.

AU - Sun, C.

AU - Jang, J.

AU - Han, C. H.

AU - Kim, T. K.

AU - Hartwig, K. T.

AU - Zhang, X.

N1 - Funding Information: We acknowledge financial support from DOE-NEUP under Contract No. DE-AC07-05ID14517-00088120. Technical assistance on ECAE processing from Mr. Robert Barber is greatly appreciated. J. Jing acknowledges the support by the National Research Foundation of Korea (NRF) Grant funded by the Korean Ministry of Education, Science and Technology ( 2011-0031584 ). We also acknowledge the use of microscopes at the Microscopy and Imaging Center at Texas A&M University.

PY - 2013

Y1 - 2013

N2 - Multiscale microstructure refinement of a 12Cr-ODS steel by equal channel angular extrusion (ECAE) was investigated by numerous microscopy techniques. The as-HIPped material showed a bimodal microstructure. Three types of second phase particles, including Y2O3, (Cr, Fe)23C 6 and Cr oxide, were observed. After ECAE, the large matrix grains and Cr rich particles were effectively refined, and yttrium oxide nanoparticles surrounding ultrafine grain boundaries were redistributed. Geometry change of nanoscale yttrium oxide particles was also observed. An increased hardening by ~35% was related to ECAE induced refinement of microstructures.

AB - Multiscale microstructure refinement of a 12Cr-ODS steel by equal channel angular extrusion (ECAE) was investigated by numerous microscopy techniques. The as-HIPped material showed a bimodal microstructure. Three types of second phase particles, including Y2O3, (Cr, Fe)23C 6 and Cr oxide, were observed. After ECAE, the large matrix grains and Cr rich particles were effectively refined, and yttrium oxide nanoparticles surrounding ultrafine grain boundaries were redistributed. Geometry change of nanoscale yttrium oxide particles was also observed. An increased hardening by ~35% was related to ECAE induced refinement of microstructures.

KW - ECAE or ECAP

KW - Ferritic steel

KW - Microstructure

KW - ODS steel

KW - Oxide dispersion strengthening

UR - http://www.scopus.com/inward/record.url?scp=84878217714&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2013.04.198

DO - 10.1016/j.jallcom.2013.04.198

M3 - Article

AN - SCOPUS:84878217714

SN - 0925-8388

VL - 577

SP - 247

EP - 256

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion

Abstract

Keywords

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