Fe-Cr-MO Based ODS Alloys Via Spark Plasma Sintering: A Combinational Characterization Study by TEM and APT

Y. Q. Wu; K. N. Allahar; J. Burns; B. Jaques; I. Charit; D. P. Butt; J. I. Cole

doi:10.1002/crat.201300173

Fe-Cr-MO Based ODS Alloys Via Spark Plasma Sintering: A Combinational Characterization Study by TEM and APT

Y. Q. Wu, K. N. Allahar, J. Burns, B. Jaques, I. Charit, D. P. Butt, J. I. Cole

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

10 Scopus citations

Abstract

Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe-16Cr-3Mo (wt.%) based ODS alloys. Spark plasma sintering (SPS) was used to consolidate the ODS alloys from powders that were milled with 0.5 wt.% Y₂O₃ powder only or with Y₂O₃ powder and 1 wt.% Ti. TEM characterization revealed that both alloys have a bimodal structure of nanometer-size (∼ 100 - 500 nm) and micronsize grains with nanostructured oxide precipitates formed along and close to grain boundaries with diameters ranging from five to tens of nanometers. APT provides further quantitative analyses of the oxide precipitates, and also reveals Mo segregation at grain boundaries next to oxide precipitates. The alloys with and without Ti are compared based on their microstructures.

Original language	American English
Pages (from-to)	645-652
Number of pages	8
Journal	Crystal Research and Technology
Volume	49
Issue number	9
DOIs	https://doi.org/10.1002/crat.201300173
State	Published - Sep 2014

Keywords

ODS
segregation
TEM
APT
SPS

EGS Disciplines

Materials Science and Engineering

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10.1002/crat.201300173

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@article{70f4fc44839447678ff24e4d0ce75eff,

title = "Fe-Cr-MO Based ODS Alloys Via Spark Plasma Sintering: A Combinational Characterization Study by TEM and APT",

abstract = "Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe-16Cr-3Mo (wt.%) based ODS alloys. Spark plasma sintering (SPS) was used to consolidate the ODS alloys from powders that were milled with 0.5 wt.% Y2O3 powder only or with Y2O3 powder and 1 wt.% Ti. TEM characterization revealed that both alloys have a bimodal structure of nanometer-size (∼ 100 - 500 nm) and micronsize grains with nanostructured oxide precipitates formed along and close to grain boundaries with diameters ranging from five to tens of nanometers. APT provides further quantitative analyses of the oxide precipitates, and also reveals Mo segregation at grain boundaries next to oxide precipitates. The alloys with and without Ti are compared based on their microstructures.",

keywords = "ODS, segregation, TEM, APT, SPS",

author = "Wu, {Y. Q.} and Allahar, {K. N.} and J. Burns and B. Jaques and I. Charit and Butt, {D. P.} and Cole, {J. I.}",

note = "Publisher Copyright: {\textcopyright} 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

year = "2014",

month = sep,

doi = "10.1002/crat.201300173",

language = "American English",

volume = "49",

pages = "645--652",

number = "9",

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TY - JOUR

T1 - Fe-Cr-MO Based ODS Alloys Via Spark Plasma Sintering

T2 - A Combinational Characterization Study by TEM and APT

AU - Wu, Y. Q.

AU - Allahar, K. N.

AU - Burns, J.

AU - Jaques, B.

AU - Charit, I.

AU - Butt, D. P.

AU - Cole, J. I.

PY - 2014/9

Y1 - 2014/9

N2 - Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe-16Cr-3Mo (wt.%) based ODS alloys. Spark plasma sintering (SPS) was used to consolidate the ODS alloys from powders that were milled with 0.5 wt.% Y2O3 powder only or with Y2O3 powder and 1 wt.% Ti. TEM characterization revealed that both alloys have a bimodal structure of nanometer-size (∼ 100 - 500 nm) and micronsize grains with nanostructured oxide precipitates formed along and close to grain boundaries with diameters ranging from five to tens of nanometers. APT provides further quantitative analyses of the oxide precipitates, and also reveals Mo segregation at grain boundaries next to oxide precipitates. The alloys with and without Ti are compared based on their microstructures.

AB - Nanoscale oxides play an important role in oxide dispersion strengthened (ODS) alloys for improved high temperature creep resistance and enhanced radiation damage tolerance. In this study, transmission electron microscopy (TEM) and atom probe tomography (APT) were combined to investigate two novel Fe-16Cr-3Mo (wt.%) based ODS alloys. Spark plasma sintering (SPS) was used to consolidate the ODS alloys from powders that were milled with 0.5 wt.% Y2O3 powder only or with Y2O3 powder and 1 wt.% Ti. TEM characterization revealed that both alloys have a bimodal structure of nanometer-size (∼ 100 - 500 nm) and micronsize grains with nanostructured oxide precipitates formed along and close to grain boundaries with diameters ranging from five to tens of nanometers. APT provides further quantitative analyses of the oxide precipitates, and also reveals Mo segregation at grain boundaries next to oxide precipitates. The alloys with and without Ti are compared based on their microstructures.

KW - ODS

KW - segregation

KW - TEM

KW - APT

KW - SPS

UR - http://www.scopus.com/inward/record.url?scp=84908220771&partnerID=8YFLogxK

UR - https://scholarworks.boisestate.edu/mse_facpubs/205

U2 - 10.1002/crat.201300173

DO - 10.1002/crat.201300173

M3 - Article

SN - 0232-1300

VL - 49

SP - 645

EP - 652

JO - Crystal Research and Technology

JF - Crystal Research and Technology

IS - 9

ER -

Fe-Cr-MO Based ODS Alloys Via Spark Plasma Sintering: A Combinational Characterization Study by TEM and APT

Abstract

Keywords

EGS Disciplines

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