Influence of processing on the microstructure and mechanical properties of 14YWT

Hoelzer, David T.; Unocic, Kinga A.; Sokolov, Mikhail A.; Byun, Thak Sang

doi:10.1016/j.jnucmat.2015.12.011

Title: Influence of processing on the microstructure and mechanical properties of 14YWT

Journal Article · Mon Dec 14 23:00:00 EST 2015 · Journal of Nuclear Materials

DOI: https://doi.org/10.1016/j.jnucmat.2015.12.011 · OSTI ID:1241464

Hoelzer, David T. ^[1]; Unocic, Kinga A. ^[1]; Sokolov, Mikhail A. ^[1]; Byun, Thak Sang ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

In this study, the investigation of the mechanical alloying (MA) conditions for producing the advanced oxide dispersion strengthened (ODS) 14YWT ferritic alloy led to significant improvements in balancing the strength, ductility and fracture toughness properties while still maintaining the salient microstructural features consisting of ultra-fine grains and high concentration of Y-, Ti- and O-enriched nanoclusters. The implemented changes to the processing conditions included reducing the contamination of the powder during ball milling, applying a pre-extrusion annealing treatment on the ball milled powder and exploring different extrusion temperatures at 850 °C (SM170 heat), 1000 °C (SM185) and 1150 °C (SM200). The microstructural studies of the three 14YWT heats showed similarities in the dispersion of nanoclusters and sub-micron size grains, indicating the microstructure was insensitive to the different extrusion conditions. Compared to past 14YWT heats, the three new heats showed lower strength, but higher ductility levels between 25 and 800 °C and significantly higher fracture toughness values between 25 °C and 700 °C. The lower contamination levels of O, C and N achieved with improved ball milling conditions plus the slightly larger grain size were identified as important factors for improving the balance in mechanical properties of the three heats of 14YWT.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1241464

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 471; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (38)

The role of nitrogen in the embrittlement of steel Briant, C. L.; Banerji, S. K.; Ritter, A. M. Metallurgical Transactions A, Vol. 13, Issue 11 https://doi.org/10.1007/BF02645939	journal	November 1982
Alloying design of oxide dispersion strengthened ferritic steel for long life FBRs core materials Ukai, S.; Harada, M.; Okada, H. Journal of Nuclear Materials, Vol. 204 https://doi.org/10.1016/0022-3115(93)90200-I	journal	September 1993
Perspective of ODS alloys application in nuclear environments Ukai, Shigeharu; Fujiwara, Masayuki Journal of Nuclear Materials, Vol. 307-311, p. 749-757 https://doi.org/10.1016/S0022-3115(02)01043-7	journal	December 2002
Mechanical and microstructural properties of a hipped RAFM ODS-steel Lindau, R.; Möslang, A.; Schirra, M. Journal of Nuclear Materials, Vol. 307-311 https://doi.org/10.1016/S0022-3115(02)01045-0	journal	December 2002
Tensile and fracture toughness properties of MA957: implications to the development of nanocomposited ferritic alloys Alinger, M. J.; Odette, G. R.; Lucas, G. E. Journal of Nuclear Materials, Vol. 307-311 https://doi.org/10.1016/S0022-3115(02)01220-5	journal	December 2002
Atom probe tomography of nanoscale particles in ODS ferritic alloys Miller, M. K.; Kenik, E. A.; Russell, K. F. Materials Science and Engineering: A, Vol. 353, Issue 1-2 https://doi.org/10.1016/S0921-5093(02)00680-9	journal	July 2003
The effect of deformation on grain growth in Zener pinned systems Bate, P. Acta Materialia, Vol. 49, Issue 8 https://doi.org/10.1016/S1359-6454(01)00033-7	journal	May 2001
On the role of alloy composition and processing parameters in nanocluster formation and dispersion strengthening in nanostuctured ferritic alloys Alinger, M. J.; Odette, G. R.; Hoelzer, D. T. Acta Materialia, Vol. 57, Issue 2 https://doi.org/10.1016/j.actamat.2008.09.025	journal	January 2009
Characterization of oxide nanoprecipitates in an oxide dispersion strengthened 14YWT steel using aberration-corrected STEM Hirata, A.; Fujita, T.; Liu, C. T. Acta Materialia, Vol. 60, Issue 16 https://doi.org/10.1016/j.actamat.2012.06.042	journal	September 2012
Stability of ferritic MA/ODS alloys at high temperatures Miller, M. K.; Hoelzer, D. T.; Kenik, E. A. Intermetallics, Vol. 13, Issue 3-4 https://doi.org/10.1016/j.intermet.2004.07.036	journal	March 2005
Unusual thermal stability of nano-structured ferritic alloys Wang, X. L.; Liu, C. T.; Keiderling, U. Journal of Alloys and Compounds, Vol. 529 https://doi.org/10.1016/j.jallcom.2012.02.143	journal	July 2012
Characterization of precipitates in MA/ODS ferritic alloys Miller, M. K.; Russell, K. F.; Hoelzer, D. T. Journal of Nuclear Materials, Vol. 351, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2006.02.004	journal	June 2006
Fracture toughness and tensile properties of nano-structured ferritic steel 12YWT Sokolov, M. A.; Hoelzer, D. T.; Stoller, R. E. Journal of Nuclear Materials, Vol. 367-370 https://doi.org/10.1016/j.jnucmat.2007.03.143	journal	August 2007
Direct correlation between morphology of (Fe,Cr)23C6 precipitates and impact behavior of ODS steels Klimiankou, M.; Lindau, R.; Möslang, A. Journal of Nuclear Materials, Vol. 367-370 https://doi.org/10.1016/j.jnucmat.2007.03.150	journal	August 2007
Influence of particle dispersions on the high-temperature strength of ferritic alloys Hoelzer, D. T.; Bentley, J.; Sokolov, M. A. Journal of Nuclear Materials, Vol. 367-370, p. 166-172 https://doi.org/10.1016/j.jnucmat.2007.03.151	journal	August 2007
CEA developments of new ferritic ODS alloys for nuclear applications de Carlan, Y.; Bechade, J. -L.; Dubuisson, P. Journal of Nuclear Materials, Vol. 386-388 https://doi.org/10.1016/j.jnucmat.2008.12.156	journal	April 2009
High temperature irradiation effects in selected Generation IV structural alloys Nanstad, R. K.; McClintock, D. A.; Hoelzer, D. T. Journal of Nuclear Materials, Vol. 392, Issue 2 https://doi.org/10.1016/j.jnucmat.2009.03.022	journal	July 2009
High temperature fracture characteristics of a nanostructured ferritic alloy (NFA) Byun, Thak Sang; Kim, Jeoung Han; Yoon, Ji Hyun Journal of Nuclear Materials, Vol. 407, Issue 2 https://doi.org/10.1016/j.jnucmat.2010.09.031	journal	December 2010
Review on the EFDA work programme on nano-structured ODS RAF steels Baluc, N.; Boutard, J. L.; Dudarev, S. L. Journal of Nuclear Materials, Vol. 417, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2010.12.065	journal	October 2011
Development of Al added high-Cr ODS steels for fuel cladding of next generation nuclear systems Kimura, A.; Kasada, R.; Iwata, N. Journal of Nuclear Materials, Vol. 417, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2010.12.300	journal	October 2011
Microstructure and impact properties of ferritic ODS ODM401 (14%Cr-ODS of MA957 type) Hadraba, Hynek; Kazimierzak, Bohumil; Stratil, Ludek Journal of Nuclear Materials, Vol. 417, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2011.01.066	journal	October 2011
Effect of neutron irradiation on nanoclusters in MA957 ferritic alloys Miller, M. K.; Hoelzer, D. T. Journal of Nuclear Materials, Vol. 418, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2011.07.031	journal	November 2011
Radiation stability of nanoclusters in nano-structured oxide dispersion strengthened (ODS) steels Certain, A.; Kuchibhatla, S.; Shutthanandan, V. Journal of Nuclear Materials, Vol. 434, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2012.11.021	journal	March 2013
Effect of crack length-to-width ratio on crack resistance of high Cr-ODS steels at high temperature for fuel cladding application Chaouadi, R.; Ramesh, M.; Gavrilov, S. Journal of Nuclear Materials, Vol. 442, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.02.017	journal	November 2013
Structure of complex oxide nanoparticles in a Fe–14Cr–2W–0.3Ti–0.3Y2O3 ODS RAF steel Unifantowicz, P.; Płociński, T.; Williams, C. A. Journal of Nuclear Materials, Vol. 442, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.04.048	journal	November 2013
Effect of bulk oxygen on 14YWT nanostructured ferritic alloys Cunningham, N. J.; Wu, Y.; Etienne, A. Journal of Nuclear Materials, Vol. 444, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2013.09.013	journal	January 2014
Temperature dependence of strengthening mechanisms in the nanostructured ferritic alloy 14YWT: Part II—Mechanistic models and predictions Kim, Jeoung Han; Byun, Thak Sang; Hoelzer, David T. Materials Science and Engineering: A, Vol. 559 https://doi.org/10.1016/j.msea.2012.08.041	journal	January 2013
Temperature dependence of strengthening mechanisms in the nanostructured ferritic alloy 14YWT: Part I—Mechanical and microstructural observations Kim, Jeoung Han; Byun, Thak Sang; Hoelzer, David T. Materials Science and Engineering: A, Vol. 559 https://doi.org/10.1016/j.msea.2012.08.042	journal	January 2013
EFTEM and Spectrum Imaging of Mechanically Alloyed Oxide-Dispersion-Strengthened 12YWT and 14YWT Ferritic Steels Bentley, J.; Hoelzer, D. T.; Coffey, D. W. Microscopy and Microanalysis, Vol. 10, Issue S02 https://doi.org/10.1017/S1431927604886276	journal	August 2004
TEM Characterization of Tensile-Tested 14YWT Nanostructured Ferritic Alloys Bentley, J.; Hoelzer, Dt Microscopy and Microanalysis, Vol. 14, Issue S2 https://doi.org/10.1017/S1431927608088296	journal	August 2008
Interfacial energies of textured silicon iron in the presence of oxygen Hondros, E. D.; Stuart, L. E. H. The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics, Vol. 17, Issue 148 https://doi.org/10.1080/14786436808223024	journal	April 1968
Role of alloying elements in nanostructured ferritic steels Miller, M. K.; Parish, C. M. Materials Science and Technology, Vol. 27, Issue 4 https://doi.org/10.1179/1743284710Y.0000000039	journal	April 2011
Nano-mesoscopic structure control in 9Cr–ODS ferritic steels Ukai, S.; Ohtsuka, S. Energy Materials, Vol. 2, Issue 1 https://doi.org/10.1179/174892407X210357	journal	March 2007
Interfacial Segregation of Nitrogen in Iron Hondros, E. D. Metal Science Journal, Vol. 1, Issue 1 https://doi.org/10.1179/msc.1967.1.1.36	journal	January 1967
High-energy synchrotron x-ray techniques for studying irradiated materials Park, Jun-Sang; Zhang, Xuan; Sharma, Hemant Journal of Materials Research, Vol. 30, Issue 9 https://doi.org/10.1557/jmr.2015.50	journal	March 2015
Effect of Ti and W on the Mechanical Properties and Microstructure of 12% Cr Base Mechanical-alloyed Nano-sized ODS Ferritic Alloys Kim, Ick-Soo; Choi, Byung-Young; Kang, Chang-Yong ISIJ International, Vol. 43, Issue 10 https://doi.org/10.2355/isijinternational.43.1640	journal	January 2003
Towards Radiation Tolerant Nanostructured Ferritic Alloys Miller, Michael K.; Hoelzer, David T.; Russell, Kaye F. Materials Science Forum, Vol. 654-656 https://doi.org/10.4028/www.scientific.net/MSF.654-656.23	journal	June 2010
Influence of nitrogen on the notch toughness of heat-treated 0.3-percent-carbon steels at low temperatures Geil, G. W.; Carwile, N. L.; Digges, T. G. Journal of Research of the National Bureau of Standards, Vol. 48, Issue 3 https://doi.org/10.6028/jres.048.027	journal	March 1952

Cited By (6)

Hot Deformation Behavior and Microstructure Evolution of 14Cr ODS Steel Zhao, Qian; Yu, Liming; Ma, Zongqing Materials, Vol. 11, Issue 6 https://doi.org/10.3390/ma11061044	journal	June 2018
Formation mechanisms of Y–Al–O complex oxides in 9Cr-ODS steels with Al addition Zhou, Xiaosheng; Ma, Zongqing; Yu, Liming Journal of Materials Science, Vol. 54, Issue 10 https://doi.org/10.1007/s10853-018-03293-8	journal	February 2019
Characterisation of atomic-scale defects in ODS ferritic alloys by positron annihilation Druzhkov, A. P.; Perminov, D. A. Philosophical Magazine, Vol. 99, Issue 7 https://doi.org/10.1080/14786435.2018.1563309	journal	January 2019
Development of next generation tempered and ODS reduced activation ferritic/martensitic steels for fusion energy applications Zinkle, S. J.; Boutard, J. L.; Hoelzer, D. T. Nuclear Fusion, Vol. 57, Issue 9 https://doi.org/10.1088/1741-4326/57/9/092005	journal	June 2017
Microstructure Evolution in ODS Alloys with a High-Volume Fraction of Nano Oxides Svoboda, Jiří; Horník, Vít; Stratil, Luděk Metals, Vol. 8, Issue 12 https://doi.org/10.3390/met8121079	journal	December 2018
ODS EUROFER Steel Strengthened by Y-(Ce, Hf, La, Sc, and Zr) Complex Oxides Husák, Roman; Hadraba, Hynek; Chlup, Zdeněk Metals, Vol. 9, Issue 11 https://doi.org/10.3390/met9111148	journal	October 2019

Similar Records

Influence of processing on the microstructure and mechanical properties of 14YWT

Journal Article · Mon Apr 25 00:00:00 EDT 2016 · Journal of Nuclear Materials · OSTI ID:1327106

Hoelzer, D. T.; Unocic, K. A.; Sokolov, Mikhail A.; +1 more

Report on the Production by Mechanical Alloying of New Heats of 14YWT

Technical Report · Fri Aug 30 00:00:00 EDT 2019 · OSTI ID:1560432

Hoelzer, David T.

Tensile fracture characteristics of nanostructured ferritic alloy 14YWT

Journal Article · Thu Dec 31 23:00:00 EST 2009 · Journal of Nuclear Materials · OSTI ID:993452

Kim, Jeoung H; Byun, Thak Sang; Hoelzer, David T

Related Subjects

36 MATERIALS SCIENCE

Title: Influence of processing on the microstructure and mechanical properties of 14YWT

Citation Formats

References (38)

Cited By (6)

Similar Records

Related Subjects