Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Stability of Y–Ti–O precipitates in friction stir welded nanostructured ferritic alloys

Journal Article · · Science and Technology of Welding and Joining
 [1];  [1];  [1];  [2];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division

Nanostructured ferritic alloys, which have complex microstructures which consist of ultrafine ferritic grains with a dispersion of stable oxide particles and nanoclusters, are promising materials for fuel cladding and structural applications in the next generation nuclear reactor. This paper evaluates microstructure of friction stir welded nanostructured ferritic alloys using electron microscopy and atom probe tomography techniques. Atom probe tomography results revealed that nanoclusters are coarsened and inhomogeneously distributed in the stir zone and thermomechanically affected zone. Three hypotheses on coarsening of nanoclusters are presented. Finally, the hardness difference in different regions of friction stir weld has been explained.

Research Organization:
Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185609
Journal Information:
Science and Technology of Welding and Joining, Journal Name: Science and Technology of Welding and Joining Journal Issue: 3 Vol. 20; ISSN 1362-1718
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Friction Stir Welding of Oxide Dispersion Strengthened Alloy MA956 book February 2011
Atom Probe Microscopy book January 2012
Local Electrode Atom Probe Tomography: A User's Guide book January 2013
Atom-Probe Tomography book January 2014
Laser welding of oxide dispersion-strengthened alloy MA754 journal January 1992
Intercalation vortices and related microstructural features in the friction-stir welding of dissimilar metals journal November 1998
Computer-aided design of transformation toughened blast resistant naval hull steels: Part I journal January 2007
Morphology, structure, and chemistry of nanoclusters in a mechanically alloyed nanostructured ferritic steel journal January 2012
New grain formation during warm deformation of ferritic stainless steel journal January 1998
Friction welding of FeAl40 Grade 3 ODS alloy journal December 1998
A model of continuous dynamic recrystallization journal May 2003
Continuous dynamic recrystallization during friction stir welding of high strength aluminum alloys journal September 2000
Characterization of microstructural strengthening in the heat-affected zone of a blast-resistant naval steel journal October 2010
Limits of detectability for clusters and solute segregation to grain boundaries journal October 2013
Stability of ferritic MA/ODS alloys at high temperatures journal March 2005
Microstructural evolution in friction stir welding of nanostructured ODS alloys journal August 2010
TEM examination of microstructural evolution during processing of 14CrYWTi nanostructured ferritic alloys journal August 2004
Characterization of precipitates in MA/ODS ferritic alloys journal June 2006
Radiation response of a 9 chromium oxide dispersion strengthened steel to heavy ion irradiation journal March 2008
Study of PM2000 microstructure evolution following FSW process journal April 2009
Some microstructural characterisations in a friction stir welded oxide dispersion strengthened ferritic steel alloy journal April 2009
Mechanical properties of irradiated ODS-EUROFER and nanocluster strengthened 14YWT journal July 2009
Microstructure and mechanical properties of friction stir processed ODS ferritic steels journal October 2011
Direct observation of ion-irradiation-induced chemical mixing journal November 2011
Microstructure and mechanical properties of friction stir welded oxide dispersion strengthened alloy journal January 2013
Joining of 14YWT and F82H by friction stir welding journal November 2013
Effect of friction pressure on the properties of friction welded MA956 iron-based superalloy journal January 2007
Temperature dependence of strengthening mechanisms in the nanostructured ferritic alloy 14YWT: Part II—Mechanistic models and predictions journal January 2013
Friction stir welding and processing journal August 2005
Relationship between grain size and Zener–Holloman parameter during friction stir processing in AZ31 Mg alloys journal September 2004
The anatomy of grain boundaries: Their structure and atomic-level solute distribution journal October 2013
Aberration-Corrected X-Ray Spectrum Imaging and Fresnel Contrast to Differentiate Nanoclusters and Cavities in Helium-Irradiated Alloy 14YWT journal March 2014
Atomic structure of nanoclusters in oxide-dispersion-strengthened steels journal October 2011
Dislocation movement through random arrays of obstacles journal October 1966
Statistical Treatment of Penetrable Obstacles journal February 1967

Cited By (3)

Joint inhomogeneity in dissimilar friction stir welded martensitic and nanostructured ferritic steels journal March 2018
Microalloyed steels journal April 2009
Microalloyed steels journal March 2016

Similar Records

Effect of friction stir welding and post-weld heat treatment on a nanostructured ferritic alloy
Journal Article · Mon Dec 07 23:00:00 EST 2015 · Journal of Nuclear Materials · OSTI ID:1286916

Microstructural Development and Mechanical Properties of Friction Stir Welded Ferritic Stainless Steel AISI 409
Journal Article · Tue Oct 15 00:00:00 EDT 2019 · Journal of Materials Engineering and Performance · OSTI ID:22970409

Friction stir welding and self-ion irradiation effects on microstructure and mechanical properties changes within oxide dispersion strengthened steel $\mathrm{MA956}$
Journal Article · Tue May 17 00:00:00 EDT 2022 · Journal of Nuclear Materials · OSTI ID:1872037