Anisotropic swelling and microcracking of neutron irradiated Ti3AlC2-Ti5Al2C3 materials

Caen Ang; Chinthaka Silva; Chunghao Shih; Takaaki Koyanagi; Yutai Katoh; Steven J. Zinkle

doi:10.1016/j.scriptamat.2015.11.008

Anisotropic swelling and microcracking of neutron irradiated Ti₃AlC₂-Ti₅Al₂C₃ materials

Caen Ang, Chinthaka Silva, Chunghao Shih, Takaaki Koyanagi, Yutai Katoh, Steven J. Zinkle

Advanced Nuclear Materials

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

M_{n + 1}AX_n (MAX) phase materials based on Ti-Al-C have been irradiated at 400 °C (673 K) with fission neutrons to a fluence of 2 × 10²⁵ n/m² (E > 0.1 MeV), corresponding to ~ 2 displacements per atom (dpa). We report preliminary results of microcracking in the Al-containing MAX phase, which contained the phases Ti₃AlC₂ and Ti₅Al₂C₃. Equibiaxial ring-on-ring tests of irradiated coupons showed that samples retained 10% of pre-irradiated strength. Volumetric swelling of up to 4% was observed. Phase analysis and microscopy suggest that anisotropic lattice parameter swelling caused microcracking. Variants of titanium aluminum carbide may be unsuitable materials for irradiation at light water reactor-relevant temperatures.

Original language	English
Pages (from-to)	74-78
Number of pages	5
Journal	Scripta Materialia
Volume	114
DOIs	https://doi.org/10.1016/j.scriptamat.2015.11.008
State	Published - Mar 15 2016

Funding

The authors would like to thank Anne Campbell, Chad Parish, Felipe Mora, Brian Eckhart, Michael McAlister, Patricia Tedder, Jordan Couch, Marie Williams, Bill Comings, Kenneth Curtis and Kurt Terrani. This research was supported by the U.S. Department of Energy , Office of Science, Fusion Energy Sciences. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy
Office of Science
Fusion Energy Sciences	DE-AC05-00OR22725

Keywords

Anisotropic swelling
Lattice parameter
MAX phase
Microcracking
Neutron irradiation

Access to Document

10.1016/j.scriptamat.2015.11.008

Cite this

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title = "Anisotropic swelling and microcracking of neutron irradiated Ti3AlC2-Ti5Al2C3 materials",

abstract = "Mn + 1AXn (MAX) phase materials based on Ti-Al-C have been irradiated at 400 °C (673 K) with fission neutrons to a fluence of 2 × 1025 n/m2 (E > 0.1 MeV), corresponding to ~ 2 displacements per atom (dpa). We report preliminary results of microcracking in the Al-containing MAX phase, which contained the phases Ti3AlC2 and Ti5Al2C3. Equibiaxial ring-on-ring tests of irradiated coupons showed that samples retained 10% of pre-irradiated strength. Volumetric swelling of up to 4% was observed. Phase analysis and microscopy suggest that anisotropic lattice parameter swelling caused microcracking. Variants of titanium aluminum carbide may be unsuitable materials for irradiation at light water reactor-relevant temperatures.",

keywords = "Anisotropic swelling, Lattice parameter, MAX phase, Microcracking, Neutron irradiation",

author = "Caen Ang and Chinthaka Silva and Chunghao Shih and Takaaki Koyanagi and Yutai Katoh and Zinkle, {Steven J.}",

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T1 - Anisotropic swelling and microcracking of neutron irradiated Ti3AlC2-Ti5Al2C3 materials

AU - Ang, Caen

AU - Silva, Chinthaka

AU - Shih, Chunghao

AU - Koyanagi, Takaaki

AU - Katoh, Yutai

AU - Zinkle, Steven J.

PY - 2016/3/15

Y1 - 2016/3/15

N2 - Mn + 1AXn (MAX) phase materials based on Ti-Al-C have been irradiated at 400 °C (673 K) with fission neutrons to a fluence of 2 × 1025 n/m2 (E > 0.1 MeV), corresponding to ~ 2 displacements per atom (dpa). We report preliminary results of microcracking in the Al-containing MAX phase, which contained the phases Ti3AlC2 and Ti5Al2C3. Equibiaxial ring-on-ring tests of irradiated coupons showed that samples retained 10% of pre-irradiated strength. Volumetric swelling of up to 4% was observed. Phase analysis and microscopy suggest that anisotropic lattice parameter swelling caused microcracking. Variants of titanium aluminum carbide may be unsuitable materials for irradiation at light water reactor-relevant temperatures.

AB - Mn + 1AXn (MAX) phase materials based on Ti-Al-C have been irradiated at 400 °C (673 K) with fission neutrons to a fluence of 2 × 1025 n/m2 (E > 0.1 MeV), corresponding to ~ 2 displacements per atom (dpa). We report preliminary results of microcracking in the Al-containing MAX phase, which contained the phases Ti3AlC2 and Ti5Al2C3. Equibiaxial ring-on-ring tests of irradiated coupons showed that samples retained 10% of pre-irradiated strength. Volumetric swelling of up to 4% was observed. Phase analysis and microscopy suggest that anisotropic lattice parameter swelling caused microcracking. Variants of titanium aluminum carbide may be unsuitable materials for irradiation at light water reactor-relevant temperatures.

KW - Anisotropic swelling

KW - Lattice parameter

KW - MAX phase

KW - Microcracking

KW - Neutron irradiation

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