σ-Phase Formation in Super Austenitic Stainless Steel During Directional Solidification and Subsequent Phase Transformations

被引：48

作者：

Marin, Raphael ^{[1
,2
,3
]}

Combeau, Herve ^{[1
]}

Zollinger, Julien ^{[1
]}

Dehmas, Moukrane ^{[2
]}

Rouat, Bernard ^{[1
]}

Lamontagne, Aude ^{[3
]}

Loukachenko, Natalia ^{[3
]}

Lhenry-Robert, Lucile ^{[3
]}

机构：

[1] Univ Lorraine, Dept Met & Mat Sci & Engn, Inst Jean Lamour, CNRS,UMR 7198, Nancy 54000, France

[2] Univ Toulouse, CIRIMAT, CNRS, Toulouse, France

[3] Ctr Rech Mat Creusot CRMC, Industeel, Le Creusot 71200, France

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2020年 / 51卷 / 07期

关键词：

PRECIPITATION; BEHAVIOR;

D O I：

10.1007/s11661-020-05794-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The solidification path and the sigma-phase precipitation mechanism in the S31254 (UNS designation) steel are investigated thanks to Quenching during Directional Solidification (QDS) experiments accompanied by scanning electron microscopy observations and electron backscattered diffraction (EBSD) analysis. Considering experimental conditions, the gamma-austenite is found to be the primary solidifying phase (1430 degrees C), followed by delta-ferrite (1400 degrees C, approximate to 87 pct solid fraction). The sigma-phase appears in the solid-state through the eutectoid decomposition of the delta-ferrite: delta -> sigma + gamma(2) (1210 degrees C), whereas the sigma-phase is predicted to form from the austenite at 1096 degrees C in equilibrium conditions. The resulting temperatures of solidification path and phase transformation are compared with Gulliver-Scheil model and equilibrium calculations predicted using Thermo-Calc (c) software. It is shown that the thermodynamics calculations agree with experimental results of solidification path. The EBSD analysis show that the delta-ferrite has delta NW2 ORs with the sigma-phase.

引用

页码：3526 / 3534

页数：9

共 32 条

[1]

Bain EC, 1927, T AM I MIN MET ENG, V75, P166

[2] Dilution and microsegregation in dissimilar metal welds between super austenitic stainless steel and nickel base alloys [J].

Banovic, SW ;

DuPont, JN ;

Marder, AR .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2002, 7 (06) :374-383

[3] THE SPACE GROUP OF THE SIGMA-FECR CRYSTAL STRUCTURE [J].

BERGMAN, BG ;

SHOEMAKER, DP .

JOURNAL OF CHEMICAL PHYSICS, 1951, 19 (04) :515-515

[4]

BRODY HD, 1965, THESIS

[5] Study of microstructure and solute partitioning in a cast Ti-48Al-2Cr-2Nb alloy by quenching during directional solidification technique [J].

Charpentier, M ;

Daloz, D ;

Hazotte, A ;

Gautier, E ;

Lesoult, G ;

Grange, M .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34A (10) :2139-2148

[6] Effects of solution treatment and continuous cooling on σ-phase precipitation in a 2205 duplex stainless steel [J].

Chen, TH ;

Yang, JR .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 311 (1-2) :28-41

[7]

Dantzig J.A., 2016, Solidification: -Revised Expanded

[8]

Hall E.O., 1966, METALLURGICAL REV, V11, P61

[9]

HATTERSLEY B, 1966, J IRON STEEL I, V204, P683

[10]

Hsieh C.-C., 2012, ISRN Metallurgy, P1

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