Evolution of the role of molybdenum in duplex stainless steels during thermal aging: From enhancing spinodal decomposition to forming heterogeneous precipitates

Lach, Timothy G.; Collins, David A.; Byun, Thak Sang

doi:10.1016/j.jnucmat.2021.153268

Evolution of the role of molybdenum in duplex stainless steels during thermal aging: From enhancing spinodal decomposition to forming heterogeneous precipitates

Journal Article · Sat Aug 28 00:00:00 EDT 2021 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2021.153268· OSTI ID:1819583

^[1]; Collins, David A. ^[1]; ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division

Thermal aging of ferrite in duplex stainless steels leads to a complex microstructural evolution that can give way to large deleterious changes in mechanical properties. The microstructural evolution mechanisms that happen concurrently are strongly linked to minor changes in composition. By characterizing duplex stainless steels with various compositions over a range of aging conditions, it was revealed that adding a modest amount of Mo to cast austenitic stainless steel (such as changing from grade CF3 to grade CF3M) not only increases the kinetics of spinodal decomposition and Ni-Si-Mn-rich G-phase precipitation, but it also forms a separate Mo-rich phase. At shorter equivalent aging times, Mo segregates from Fe and towards Cr accelerating spinodal decomposition. At longer aging times, Mo enriches in the Ni-Si-Mn clusters before phase separating into an adjoined Mo-rich cluster. We found that these phase changes and precipitation events result in a rather steep drop in fracture and impact toughness. These results will inform the design of similar alloys for use at high temperatures.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC05-00OR22725; AC05-76RL01830

OSTI ID:: 1819583

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 557; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (39)

Influence of Thermal Aging on the Microstructure and Mechanical Behavior of Dual-Phase, Precipitation-Hardened, Powder Metallurgy Stainless Steels Stewart, J. L.; Williams, J. J.; Chawla, N. Metallurgical and Materials Transactions A, Vol. 43, Issue 1 https://doi.org/10.1007/s11661-011-0844-3	journal	August 2011
Evaluation of thermal aging embrittlement of duplex stainless steels by electrochemical method Park, Jun Sang; Yoon, Young Ku Scripta Metallurgica et Materialia, Vol. 32, Issue 8 https://doi.org/10.1016/0956-716X(95)00119-G	journal	April 1995
Evaluation of thermal aging embrittlement in CF8 duplex stainless steel by small punch test Cheon, Jin Sik; Kim, In Sup Journal of Nuclear Materials, Vol. 278, Issue 1 https://doi.org/10.1016/S0022-3115(99)00213-5	journal	February 2000
Assessment of thermal embrittlement in duplex stainless steels 2003 and 2205 for nuclear power applications Tucker, J. D.; Miller, M. K.; Young, G. A. Acta Materialia, Vol. 87 https://doi.org/10.1016/j.actamat.2014.12.012	journal	April 2015
Non-uniform phase separation in ferrite of a duplex stainless steel Zhang, B.; Xue, F.; Li, S. L. Acta Materialia, Vol. 140 https://doi.org/10.1016/j.actamat.2017.08.044	journal	November 2017
Thermodynamics and kinetics of core-shell versus appendage co-precipitation morphologies: An example in the Fe-Cu-Mn-Ni-Si system Shu, Shipeng; Wells, Peter B.; Almirall, Nathan Acta Materialia, Vol. 157 https://doi.org/10.1016/j.actamat.2018.07.037	journal	September 2018
Effects of thermal aging and low-fluence neutron irradiation on the mechanical property and microstructure of ferrite in cast austenitic stainless steels Chen, Siwei; Miyahara, Yuichi; Nomoto, Akiyoshi Acta Materialia, Vol. 179 https://doi.org/10.1016/j.actamat.2019.08.029	journal	October 2019
Monte Carlo simulations of Cu/Ni–Si–Mn co-precipitation in duplex stainless steels Frazier, William E.; Lach, Timothy G.; Byun, Thak Sang Acta Materialia, Vol. 194 https://doi.org/10.1016/j.actamat.2020.03.053	journal	August 2020
Precipitation-site competition in duplex stainless steels: Cu clusters vs spinodal decomposition interfaces as nucleation sites during thermal aging Lach, Timothy G.; Frazier, William E.; Wang, Jing Acta Materialia, Vol. 196 https://doi.org/10.1016/j.actamat.2020.05.017	journal	September 2020
Atom probe tomography spatial reconstruction: Status and directions Larson, D. J.; Gault, B.; Geiser, B. P. Current Opinion in Solid State and Materials Science, Vol. 17, Issue 5 https://doi.org/10.1016/j.cossms.2013.09.002	journal	October 2013
Evaluation of the recovery of thermal aging embrittlement of CF8M cast stainless steels after reversion heat treatments Jang, Changheui; Jang, Hun; Hong, Sunghoon International Journal of Pressure Vessels and Piping, Vol. 131 https://doi.org/10.1016/j.ijpvp.2015.04.011	journal	July 2015
Effects of thermal aging on the fracture toughness of cast stainless steel CF8 Collins, David A.; Barkley, Emily L.; Lach, Timothy G. International Journal of Pressure Vessels and Piping, Vol. 173 https://doi.org/10.1016/j.ijpvp.2019.04.017	journal	June 2019
Embrittlement of RPV steels: An atom probe tomography perspective Miller, M. K.; Russell, K. F. Journal of Nuclear Materials, Vol. 371, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2007.05.003	journal	September 2007
Study of phase transformation and mechanical properties evolution of duplex stainless steels after long term thermal ageing (>20years) Pareige, C.; Novy, S.; Saillet, S. Journal of Nuclear Materials, Vol. 411, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2011.01.036	journal	April 2011
Kinetics of secondary phase precipitation during spinodal decomposition in duplex stainless steels: A kinetic Monte Carlo model – Comparison with atom probe tomography experiments Emo, Jonathan; Pareige, Cristelle; Saillet, Sébastien Journal of Nuclear Materials, Vol. 451, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2014.04.025	journal	August 2014
In situ TEM study of G-phase precipitates under heavy ion irradiation in CF8 cast austenitic stainless steel Chen, Wei-Ying; Li, Meimei; Zhang, Xuan Journal of Nuclear Materials, Vol. 464 https://doi.org/10.1016/j.jnucmat.2015.04.042	journal	September 2015
Kinetics of G-phase precipitation and spinodal decomposition in very long aged ferrite of a Mo-free duplex stainless steel Pareige, C.; Emo, J.; Saillet, S. Journal of Nuclear Materials, Vol. 465 https://doi.org/10.1016/j.jnucmat.2015.06.017	journal	October 2015
Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel Chen, Wei-Ying; Li, Meimei; Kirk, Marquis A. Journal of Nuclear Materials, Vol. 471 https://doi.org/10.1016/j.jnucmat.2015.08.032	journal	April 2016
Cracking behavior of thermally aged and irradiated CF-8 cast austenitic stainless steel Chen, Y.; Alexandreanu, B.; Chen, W. -Y. Journal of Nuclear Materials, Vol. 466 https://doi.org/10.1016/j.jnucmat.2015.08.047	journal	November 2015
Cluster dynamics modeling of Mn-Ni-Si precipitates in ferritic-martensitic steel under irradiation Ke, Jia-Hong; Ke, Huibin; Odette, G. Robert Journal of Nuclear Materials, Vol. 498 https://doi.org/10.1016/j.jnucmat.2017.10.008	journal	January 2018
Quantification of hardening contribution of G-Phase precipitation and spinodal decomposition in aged duplex stainless steel: APT analysis and micro-hardness measurements Badyka, R.; Monnet, G.; Saillet, S. Journal of Nuclear Materials, Vol. 514 https://doi.org/10.1016/j.jnucmat.2018.12.002	journal	February 2019
Prediction of J-R curves and thermoelectric power evolution of cast austenitic stainless steels after very long-term aging (200,000 h) at temperatures below 350 °C Saillet, Sébastien; Le Delliou, Patrick Journal of Nuclear Materials, Vol. 540 https://doi.org/10.1016/j.jnucmat.2020.152328	journal	November 2020
Degradation of impact toughness in cast stainless steels during long-term thermal aging Byun, Thak Sang; Collins, David A.; Lach, Timothy G. Journal of Nuclear Materials, Vol. 542 https://doi.org/10.1016/j.jnucmat.2020.152524	journal	December 2020
Thermal aging behaviors of duplex stainless steels used in nuclear power plant: A review Fan, Y.; Liu, T. G.; Xin, L. Journal of Nuclear Materials, Vol. 544 https://doi.org/10.1016/j.jnucmat.2020.152693	journal	February 2021
Correlative STEM-APT characterization of radiation-induced segregation and precipitation of in-service BWR 304 stainless steel Lach, Timothy G.; Olszta, Matthew J.; Taylor, Sandra D. Journal of Nuclear Materials, Vol. 549 https://doi.org/10.1016/j.jnucmat.2021.152894	journal	June 2021
Chi-phase precipitation in a duplex stainless steel Escriba, D. M.; Materna-Morris, E.; Plaut, R. L. Materials Characterization, Vol. 60, Issue 11 https://doi.org/10.1016/j.matchar.2009.04.013	journal	November 2009
Precipitation behavior of stainless steel weld overlay cladding exposed to a long-term thermal aging Cao, Xinyuan; Zhu, Ping; Wang, Wei Materials Characterization, Vol. 137 https://doi.org/10.1016/j.matchar.2018.01.018	journal	March 2018
Irradiation-induced precipitation and inverse coarsening of G-phase in austenitic stainless steel weld metal Lin, Xiaodong; Peng, Qunjia; Han, En-Hou Materials Characterization, Vol. 151 https://doi.org/10.1016/j.matchar.2019.03.035	journal	May 2019
Co-precipitation of nanoscale particles in steels with ultra-high strength for a new era Jiao, Z. B.; Luan, J. H.; Miller, M. K. Materials Today, Vol. 20, Issue 3 https://doi.org/10.1016/j.mattod.2016.07.002	journal	April 2017
Low temperature thermal aging of austenitic stainless steel welds: Kinetics and effects on mechanical properties Chandra, K.; Kain, Vivekanand; Bhutani, Vikas Materials Science and Engineering: A, Vol. 534 https://doi.org/10.1016/j.msea.2011.11.055	journal	February 2012
Effect of thermal aging on microstructure, hardness, tensile and impact properties of Alloy 617 Narayan Singh, Aditya; Moitra, A.; Bhaskar, Pragna Materials Science and Engineering: A, Vol. 710 https://doi.org/10.1016/j.msea.2017.10.078	journal	January 2018
Effects of long-term thermal aging on bulk and local mechanical behavior of ferritic-austenitic duplex stainless steels Schwarm, Samuel C.; Mburu, Sarah; Kolli, R. Prakash Materials Science and Engineering: A, Vol. 720 https://doi.org/10.1016/j.msea.2018.02.058	journal	March 2018
A comprehensive study of the effects of long-term thermal aging on the fracture resistance of cast austenitic stainless steels Collins, David A.; Carter, Emily L.; Lach, Timothy G. Nuclear Engineering and Technology https://doi.org/10.1016/j.net.2021.08.022	journal	August 2021
Irradiation-induced segregation at phase boundaries in austenitic stainless steel weld metal Lin, Xiaodong; Peng, Qunjia; Han, En-Hou Scripta Materialia, Vol. 149 https://doi.org/10.1016/j.scriptamat.2018.01.033	journal	May 2018
Morphology, crystallography and defects of the intermetallic -phase precipitated in a duplex ( + ) stainless steel Redjaïmia, A.; Proult, A.; Donnadieu, P. Journal of Materials Science, Vol. 39, Issue 7 https://doi.org/10.1023/B:JMSC.0000019999.27065.13	journal	April 2004
Accurate determination of the number density of G-phase precipitates in thermally aged duplex stainless steel Hamaoka, T.; Nomoto, A.; Nishida, K. Philosophical Magazine, Vol. 92, Issue 22 https://doi.org/10.1080/14786435.2012.674222	journal	August 2012
Effects of molybdenum on precipitation behaviours in aged cast stainless steels Hamaoka, Takumi; Konno, Toyohiko J.; Sawabe, Takashi Philosophical Magazine, Vol. 96, Issue 24 https://doi.org/10.1080/14786435.2016.1205231	journal	July 2016
An atom probe perspective on phase separation and precipitation in duplex stainless steels Guo, Wei; Garfinkel, David A.; Tucker, Julie D. Nanotechnology, Vol. 27, Issue 25 https://doi.org/10.1088/0957-4484/27/25/254004	journal	May 2016
APFIM and AEM investigation of CF8 and CF8M primary coolant pipe steels Miller, M. K.; Bentley, J. Materials Science and Technology, Vol. 6, Issue 3 https://doi.org/10.1179/mst.1990.6.3.285	journal	March 1990

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Evolution of the role of molybdenum in duplex stainless steels during thermal aging: From enhancing spinodal decomposition to forming heterogeneous precipitates

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