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Vol 13, Issue 1, 2021
Pages: 125 - 133
Research article
Metallic materials
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Published: 28.05.2021. Research article Metallic materials

SIGMA PHASE PRECIPITATION IN AUSTENITIC STAINLESS STEELS

By
Amna Hodžić ,
Amna Hodžić
Contact Amna Hodžić

University of Zenica , Zenica , Bosnia and Herzegovina

Almaida Gigovic-Gekic ,
Almaida Gigovic-Gekic

University of Zenica , Zenica , Bosnia and Herzegovina

Raza Sunulahpašić
Raza Sunulahpašić

University of Zenica , Zenica , Bosnia and Herzegovina

Abstract

The precipitation of sigma (σ) phase in austenitic stainless steels is a significant subject of many investigations. Exposure of these steels to elevated temperatures (from 600 °C to 900 °C) results in precipitation of σ phase (transformation product from delta (δ) ferrite) which is one of the main reasons for the deterioration austenitic stainless steels properties. It is therefore of considerable interest to study the conditions for σ phase formation, as well as the mechanism of the transformation. This review paper presents overview of precipitation characteristics (including morphologies and precipitation sites) as well as effect of σ phase on properties of austenitic stainless steels. It is particularly highlighted that the precipitation of hard, brittle and nonmagnetic σ phase occurring preferentially at δ/γ phase boundary and within δ ferrite islands (high Cr concentrated region) cause worse mechanical properties (impact toughness and elongation) and corrosion resistance. 

References

1.
Llorca-Isern N, López-Luque H, López-Jiménez I, Biezma M. V.: Identification of sigmaand chi phases in duplex stainless steels. Materials Characterization. 2016;112:20-29,.
2.
Khatak HS, Raj. B.: Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring. 2002;400,.
3.
Moslemi N, Redzuan N, Ahmad N, Hor T. N.:Effect of Current on Characteristic for 316 Stainless Steel Welded Joint Including Microstructure and Mechanical Properties. Procedia CIRP. 2015;26:560-564,.
4.
Konosu S, Mashiba H, Takeshima M, Ohtsuka T. Effects of pretest aging on creep crack growth properties of type 308 austenitic stainless steel weld metals. Engineering Failure Analysis. 2001;8(1):75-85,.
5.
Kožuh S, Gojić M, Ivanić I, Kosec B. Microstructure of welded austenitic stainless steel after annealing at 900 °C. Zavarivanje i zavarene konstrukcije. 2013;58:149–56.
6.
Sejč P, Kubíček R. Influence of Heat Input on the Content of Delta Ferrite in the Structure of 304L Stainless Steel GTA Welded Joints. 2012;19:8-14,.
7.
Hosein M. Homogenization Heat Treatment to Reduce the Failure of Heat Resistant Steel Castings. Metallurgy - Advances in Materials and Processes.
8.
Hsieh CC, Lin DY, Chang. T.C.:“Microstructural Evolution During the δ/σ/γ Phase Transformation of the SUS 309LSi stainless Steel after Aging under Various Nitrogen Atmospheric Ratios.” Materials Science and Engineering A. 2008;475(1–2):128-135,.
9.
Hsieh CC, Lin DY, Wu W. Precipitation Behavior of σ Phase in 19Cr-9Ni-2Mn and 18Cr-0.75Si Stainless Steels Hot-Rolled at 800 °C with Various Reduction Ratios”,Materials. Science and Engineering A. 2007;467(1–2):181-189,.
10.
Folkhard E. Welding Metallurgy of Stainless Steels. 1988.
11.
Yakel HL. Atom Distribution in σ Phases. I. Fe and Cr Atom Distributions in a Binary σ Phase Equilibrated at 1063, 1013 and 923 K. Acta Crystallogr B. 1983;39:20-28 ,.
12.
Padilha AF, Rios P. R.: Decomposition of Austenite in Austenitic Stainless Steels. ISIJ International. 2002;42(4):325-337,.
13.
Villanueva DME, Junior FCP, Plaut RL, Padilha A. F.: Comparative study on sigma phase precipitation of three types of stainless steels:austenitic, superferritic and duplex. Materials Science and Technology. 2006;22(9):1098-1104,.
14.
Restrepo Garcés G, Le Coze J, Garin JL, Mannheim R. L.: σ phase precipitation in two heat resistant steels – influence of carbides and microstructure. Scripta Materialia. 2004;50(5):651-654,.
15.
Weiss B, Stickler R. Phase instabilities during high-temperature exposure of 316 austenitic stainless steel, Metall. Trans. 1972;3(4):851–66.
16.
Kuboň Z, Stejskalová Š, Kander L. Effect of Sigma Phase on Fracture Behavior of Steels and Weld Joints of Components in Power Industry Working at Supercritical Conditions. Austenitic Stainless Steels - New Aspects.
17.
Hsieh CC, Wu W. Overview of Intermetallic Sigma Phase Precipitation in Stainless Steels, International Scholarly Research Network. ISRN Metallurgy. 2012:1-16,.
18.
Parrens C, Lacaze J, Malard B, Dupain JL, Poquillon D. Isothermal and Cyclic Aging of 310S Austenitic Stainless Steel. Metallurgical and Materials Transactions A, Springer Verlag/ASM International. 2017;48(6):2834-2843,.
19.
Plaut RL, Herrera C, Escriba DM, Rios PR, Padilha A. F.: A Short Review on Wrought Austenitic Stainless Steels at High Temperatures: Processing. Microstructure, Properties and Performance, Materials Research. 2007;10(4):453-460,.
20.
Gigović-Gekić A, Oruč M, Muhamedagić S, ON EFFECTOFDELTAFERRITECONTENT. In: THE TENSILE PROPERTIES IN NITRONIC 60 STEEL AT ROOM TEMPERATURE AND 750 °C,Materiali in Tehnologije. 2012. p. 519-523,.
21.

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