Influence of scandium addition on the high-temperature grain size stabilization of oxide-dispersion-strengthened (ODS) ferritic alloy

被引：22

作者：

Li, Lulu ^{[1
]}

Xu, Weizong ^{[1
]}

Saber, Mostafa ^{[1
]}

Zhu, Yuntian ^{[1
]}

Koch, Carl C. ^{[1
]}

Scattergood, Ronald O. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 636卷

基金：

美国国家科学基金会;

关键词：

Mechanical alloying; Oxide-dispersion-strengthened alloy; Thermal stability; Sc stabilization; FE-CR ALLOYS; INTERMETALLIC COMPOUNDS; MARTENSITIC STEELS; THERMAL-STABILITY; RESISTANT STEELS; PARTICLES; TITANIUM; METALS; NANOCLUSTERS; BINARY;

D O I：

10.1016/j.msea.2015.03.117

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of 1-4 at% Sc addition on the thermal stability of mechanically alloyed ODS ferritic alloy was studied in this work. Sc addition was found to significantly stabilize grain size and microhardness at high temperatures. Grain sizes of samples with 1 and 4 at% Sc was found maintained in the nanoscale range at temperatures up to 1000 degrees C with hardness maintained at 5.6 and 6.7 GPa, respectively. The detailed microstructure was also investigated from EDS elemental mapping, where nanofeatures [ScTiO] were observed, while nanosized [YTiO] particles were rarely seen. This is probably due to the concentration difference between Sc and Y, leading to the formation of [ScTiO] favoring that of [YTiO]. Precipitation was considered as the major source for the observed high temperature stabilization. In addition, 14YT-Sc alloys without large second phases such as Ti-oxide can exhibit better performance compared to conventional ODS materials. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：565 / 571

页数：7

共 46 条

[1] The binary rare earth oxides [J].

Adachi, G ;

Imanaka, N .

CHEMICAL REVIEWS, 1998, 98 (04) :1479-1514

[2] On the role of alloy composition and processing parameters in nanocluster formation and dispersion strengthening in nanostuctured ferritic alloys [J].

Alinger, M. J. ;

Odette, G. R. ;

Hoelzer, D. T. .

ACTA MATERIALIA, 2009, 57 (02) :392-406

[3]

Alinger M.J., 2004, THESIS U CALIF, P341

[4] The development and stability of Y-Ti-O nanoclusters in mechanically alloyed Fe-Cr based ferritic alloys [J].

Alinger, MJ ;

Odette, GR ;

Hoelzer, DT .

JOURNAL OF NUCLEAR MATERIALS, 2004, 329 :382-386

[5] Mechanically alloyed metals [J].

Bhadeshia, HKDH .

MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (11-12) :1404-1411

[6] Creep behavior and deformation mechanisms in a nanocluster strengthened ferritic steel [J].

Brandes, M. C. ;

Kovarik, L. ;

Miller, M. K. ;

Daehn, G. S. ;

Mills, M. J. .

ACTA MATERIALIA, 2012, 60 (04) :1827-1839

[7] Morphology, structure, and chemistry of nanoclusters in a mechanically alloyed nanostructured ferritic steel [J].

Brandes, M. C. ;

Kovarik, L. ;

Miller, M. K. ;

Mills, M. J. .

JOURNAL OF MATERIALS SCIENCE, 2012, 47 (08) :3913-3923

[8] SANS and TEM study of Y2O3 particle distributions in oxide-dispersion strengthened EUROFER martensitic steel for fusion reactors [J].

Coppola, R. ;

Klimiankou, M. ;

Lindau, R. ;

May, R. P. ;

Valli, M. .

PHYSICA B-CONDENSED MATTER, 2004, 350 (1-3) :E545-E548

[9] ENTHALPIES OF FORMATION OF LIQUID AND SOLID BINARY-ALLOYS BASED ON 3D METALS .1. ALLOYS OF SCANDIUM, TITANIUM AND VANADIUM [J].

DEBOER, FR ;

BOOM, R ;

MIEDEMA, AR .

PHYSICA B & C, 1980, 101 (03) :294-319

[10] Helium entrapment in a nanostructured ferritic alloy [J].

Edmondson, P. D. ;

Parish, C. M. ;

Zhang, Y. ;

Hallen, A. ;

Miller, M. K. .

SCRIPTA MATERIALIA, 2011, 65 (08) :731-734

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