For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Preface
Microstructural and Thermal Characterization of AZ31 and Ca-modified AZ31 Magnesium Alloys: Insight into Dynamic Recrystallization and Discontinuous Precipitation Phenomena
p.3
Modeling the Heterogeneity Spatial Distribution of Coarse Second Phase Particle on Recrystallization Behavior in 7XXX Al Alloy
p.13
Influence of Si and Mo on the Sigma-Phase Precipitation in S32750 Super Duplex Stainless Steel Slab
p.27
Enhancement of the Microstructure and Mechanical Properties of 1020 Carbon Steel and AISI 304 Stainless Steel Dissimilar Weld Using Different Post-Weld Heat Treatments
p.37
Metal Additive Manufacturing in Automotive Industry: A Review of Applications, Advantages, and Limitations
p.49
Measurement of Molten Steel Level Using a Single Camera in Top Side-Pouring Twin-Roll Casting
p.63
Effect of CNT on the Physical and Electrical Properties of CNT/UHMWPE Nanocomposite Sensor
p.75
Numerical Investigation of Failure in Epoxy-Based Adhesive Joints
p.87

Influence of Si and Mo on the Sigma-Phase Precipitation in S32750 Super Duplex Stainless Steel Slab

Article Preview

Abstract:

In this study, we investigated the effect of Si and Mo on the sigma-phase precipitation in S32750 super duplex stainless steel slab. The activity for Mo with increasing Si and Mo was calculated by the Wagner formula, and the equilibrium solidification phase diagrams of S32750 duplex stainless steels with different Si and Mo contents were calculated using the thermo-calc software. The sigma phase precipitated mainly at ferrite/austenite phase boundaries and grew up towards the interior of ferrite phase in S32750 SDSS slab. The area fraction and size of the sigma phases significantly increased with increasing Mo content and Si content. Also, the increment in Mo and Si content affected the Mo concentration in sigma phase. The sample（Mo:3.4%,Si：0.3%） had a lowest sigma-phase area fraction of 2.84% and had lowest Mo content in σ phase.The calculation results showed that the increase of Mo and Si content increased the initial precipitation temperature and maximum precipitation amount of σ phase in S32750 SDSS equilibrium phase diagram. The activity of Mo also increased with increasing Si content and Mo content. That is, Mo and Si elements promoted the precipitation of σ phase.

You might also be interested in these eBooks
Special and Structural Materials View Preview

Info:

Periodical:

Materials Science Forum (Volume 1103)

Pages:

27-35

DOI:

https://doi.org/10.4028/p-8yyrDi

Citation:

Cite this paper

Online since:

October 2023

Authors:

Xing Run Chen*, Ji Xiang Pan, Zhang Xin Qian

Keywords:

Activity, Mo Content, Precipitation Behavior, S32750 Super Duplex Stainless Steel (SDSS), Si Content, Sigma Phase, Slab

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2023 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

References

[1] K. Nagae, K. Ejiri, J. Hirabayashi, Y. Yamamoto, M. Hatakeyama and S. Sunada, Effect of sigma phase on corrosion behavior of duplex stainless steel, Mater. Trans. 63 (2022) 726-729.

DOI: 10.2320/matertrans.mt-ma2022002

Google Scholar

[2] W. Wolf, D. Kelly, D.B. Santos, Effect of aging temperature and time on secondary phase precipitation and texture in an ultrafine grained 2205 duplex stainless steel after cold rolling, Mater. Performance. Charact. 10 (2021) 297-316.

DOI: 10.1520/mpc20200049

Google Scholar

[3] D. Silva, T.A. Simes, D.A. Macedo, A. Bueno and R.M Gomes, Microstructural influence of sigma phase on pitting corrosion behavior of duplex stainless steel/NaCl electrolyte couple, Mater. Chem. Phys. 259 (2021) 124056.

DOI: 10.1016/j.matchemphys.2020.124056

Google Scholar

[4] A. Biserova-Tahchieva, D. Chatterjee, A. Helvoort, N. Llorca-Isern and J.M. Cabrera, Effect of the nanostructuring by high-pressure torsion process on the secondary phase precipitation in UNS S32750 Superduplex stainless steel, Mater. Charact. 183 (2022) 111639.

DOI: 10.1016/j.matchar.2021.111639

Google Scholar

[5] T. Osuki, K. Ogawa, Modelling of effects of cold work on sigma phase growth rate in super duplex stainless steel, ISIJ Int. 61 (2021) 487-492.

DOI: 10.2355/isijinternational.isijint-2020-481

Google Scholar

[6] E. Silva, V. Albuquerque, J.P. Leite, A. Varela, E. Moura and J. Tavares, Phase transformations evaluation on a UNS S31803 duplex stainless steel based on nondestructive testing, Mat. Sci. Eng. A. 516 (2019) 126-130.

DOI: 10.1016/j.msea.2009.03.004

Google Scholar

[7] M.V. Biezma, U. Martin, P. Linhardt, J. Ress, C. Rodriguez and D.M. Bastidas, Non-destructive techniques for the detection of sigma phase in duplex stainless steel: a comprehensive review, Engineering Failure Analysis.122 (2021) 105227.

DOI: 10.1016/j.engfailanal.2021.105227

Google Scholar

[8] Q. Wang, L.J. Wang, Y.H. Sun, A.M. Zhao, W. Zhang, J.M. Li, H.B. Dong and K.C. Chou, The influence of Ce micro-alloying on the precipitation of intermetallic sigma phase during solidification of super-austenitic stainless steels, J. Alloys Compd. 815 (2020) 152418(1-8).

DOI: 10.1016/j.jallcom.2019.152418

Google Scholar

[9] L. Changmin, L. Youngchai, L. Changhee and H. Seunggab, Precipitation behavior of the sigma phase with Ni and Mn content variations in superaustenitic stainless steel weld metal, Mater. Charact.144 (2018) 148-154.

DOI: 10.1016/j.matchar.2018.07.006

Google Scholar

[10] L. Changmin, R. Sungjoo, L. Changhee and H. Seunggab, Influence of Si on sigma phase precipitation and pitting corrosion in superaustenitic stainless steel weld metal, Mater. Chem. Phys. 207 (2018) 91-97.

DOI: 10.1016/j.matchemphys.2017.12.055

Google Scholar

[11] Y.L. Bai , Y.H. Yang, J.C. Cao, Y. Gu and J. Pu. Effect of Mn on σ phase and toughness of 22Cr% duplex stainless steel by aging treatment at 700 ℃, J. Mater. Eng. 45 (2017) 71-79.

Google Scholar

[12] G.P. Li, H.X. Pei , J.C. Li and S.L. Zhang, Influence of σ phases on the microstructure and properties of S32760 super duplex stainless steel, Chin. J. Eng. 38 (2016) 364-370.

Google Scholar

[13] Z.Y. Luo, J.Y. Li, Precipitation behavior of σ phase in UNS S32760 super duplex stainless steel, Trans. Mater. Heat Treatment. 36 (2015) 110-115.

Google Scholar

[14] H.H. Lu, H.K. Guo, Y. Luo, Z.G. Liu, W.Q. Li, J.C. Li and W. Liang, Microstructural evolution, precipitation and mechanical properties of hot rolled 27Cr-4Mo-2Ni ferritic steel during 800 ℃aging, Mater. Des. 160 (2018) 999-1009.

DOI: 10.1016/j.matdes.2018.10.039

Google Scholar

[15] I. Alvarez-Armas, S. Degallaix-Moreuil, Duplex stainless steels, Wiley, 2013.

DOI: 10.1002/9781118557990

Google Scholar

[16] C. Wang, Y. Wu, Y. Guo, J. Guo and L. Zhou, Precipitation behavior of sigma phase and its influence on mechanical properties of a Ni-Fe based alloy, J. Alloys Compd. 784 (2019) 266-275.

DOI: 10.1016/j.jallcom.2019.01.048

Google Scholar

[17] I.J. Marques, F.J. Silva, T. Santos, Rapid precipitation of intermetallic phases during isothermal treatment of duplex stainless steel joints produced by friction stir welding, J. Alloys Compd. 820 (2020) 153170.

DOI: 10.1016/j.jallcom.2019.153170

Google Scholar

[18] A. Keplinger, C. Martinez, M. Hausbauer and M. Kapp. Early stages of deleterious phases in super and hyper duplex stainless steel and their effect on toughness, Berg Huettenmaenn Monatsh. 165 (2020) 33-39.

DOI: 10.1007/s00501-019-00936-4

Google Scholar

[19] R.O. Sousa, P. Lacrrda, P.J. Ferreira and L.M.M. Ribeiro, On the precipitation of sigma and chi phases in a cast super duplex stainless steel, Metall. Mater. Trans. A. 50 (2019) 4758-4778.

DOI: 10.1007/s11661-019-05396-6

Google Scholar

[20] Niklas Pettersson, Rachel F.A. Pettersson, Sten Wessman, Precipitation of chromium nitrides in the super duplex stainless steel 2507, Metall. Mater. Trans. A. 46 (2015) 1062-1072.

DOI: 10.1007/s11661-014-2718-y

Google Scholar

[21] J. Zhang, Computational thermodynamics of metallurgical melts and solutions, Metallurgical Industry Press, Beijing, 2007.

Google Scholar

[22] M. Martins, L.C. Casteletti, Sigma phase morphologies in cast and aged super duplex stainless steel, Mater. Charact. 60 (2009) 792-795.

DOI: 10.1016/j.matchar.2009.01.005

Google Scholar

[23] R. Magnabosco, D. Santos, Intermetallic phases formation during short aging between 850℃ and 950℃ of a superduplex stainless steel, J. Mater. Res. Technol. 1 (2012) 71-74.

DOI: 10.1016/s2238-7854(12)70013-3

Google Scholar

[24] H. Sieurin, R. Sandström, Sigma phase precipitation in duplex stainless steel 2205, Mater. Sci. Eng. A. 444 (2007) 271-276.

DOI: 10.1016/j.msea.2006.08.107

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.