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

Yu, Xinghua; Mazumder, B.; Miller, M. K.; David, S. A.; Feng, Z.

doi:10.1179/1362171815Y.0000000002

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

Journal Article · Mon Jan 19 04:00:00 EST 2015 · Science and Technology of Welding and Joining

DOI:https://doi.org/10.1179/1362171815Y.0000000002· OSTI ID:1185609

Yu, Xinghua ^[1]; Mazumder, B. ^[1]; Miller, M. K. ^[1]; David, S. A. ^[2]; Feng, Z. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
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.

View Accepted Manuscript (DOE)

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

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Cited By (3)

Joint inhomogeneity in dissimilar friction stir welded martensitic and nanostructured ferritic steels Han, Wentuo; Wan, Farong; Yabuuchi, Kiyohiro Science and Technology of Welding and Joining, Vol. 23, Issue 8 https://doi.org/10.1080/13621718.2018.1456797	journal	March 2018
Microalloyed steels Price, David Ironmaking & Steelmaking, Vol. 36, Issue 3 https://doi.org/10.1179/174328109x401587	journal	April 2009
Microalloyed steels Baker, T. N. Ironmaking & Steelmaking, Vol. 43, Issue 4 https://doi.org/10.1179/1743281215y.0000000063	journal	March 2016

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

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