Tensile behavior of dual-phase titanium alloys under high-intensity proton beam exposure: Radiation-induced omega phase transformation in Ti-6Al-4V

Ishida, Taku; Wakai, Eiichi; Makimura, Shunsuke; Casella, Andrew M.; Edwards, Danny J.; Senor, David J.; Ammigan, Kavin; Hurh, Patrick G.; Densham, Christopher J.; Fitton, Michael D.; Bennett, Joe M.; Kim, Dohyun; Simos, Nikolaos; Hagiwara, Masayuki; Kawamura, Naritoshi; Meigo, Shin-ichiro; Yohehara, Katsuya

doi:10.1016/j.jnucmat.2020.152413

Title: Tensile behavior of dual-phase titanium alloys under high-intensity proton beam exposure: Radiation-induced omega phase transformation in Ti-6Al-4V

Journal Article · Sat Jul 25 00:00:00 EDT 2020 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2020.152413· OSTI ID:1647076

Ishida, Taku ^[1]; Wakai, Eiichi ^[2]; Makimura, Shunsuke ^[1]; Casella, Andrew M. ^[3]; Edwards, Danny J. ^[3]; Senor, David J. ^[3]; Ammigan, Kavin ^[4]; Hurh, Patrick G. ^[4]; Densham, Christopher J. ^[5]; Fitton, Michael D. ^[5]; Bennett, Joe M. ^[5]; Kim, Dohyun ^[6]; Simos, Nikolaos ^[6]; Hagiwara, Masayuki ^[1]; Kawamura, Naritoshi ^[1]; Meigo, Shin-ichiro ^[2]; Yohehara, Katsuya ^[4]

J-PARC; KEK, Tsukuba
J-PARC
PNL, Richland
Fermilab
Rutherford
Brookhaven

A high-intensity proton beam exposure with 181 MeV energy has been conducted at Brookhaven Linac Isotope Producer facility on various material specimens for accelerator targetry applications, including titanium alloys as a beam window material. The radiation damage level of the analyzed capsule was 0.25 dpa at beam center region with an irradiation temperature around 120 °C. Tensile tests showed increased hardness and a large decrease in ductility for the dual α+β-phase Ti-6Al-4V Grade-5 and Grade-23 extra low interstitial alloys, with the near α-phase Ti-3Al-2.5V Grade-9 alloy still exhibiting uniform elongation of a few % after irradiation. Transmission Electron Microscope analyses on Ti-6Al-4V indicated clear evidence of a high-density of defect clusters with size less than 2 nm in each α-phase grain. The β-phase grains did not contain any visible defects such as loops or black dots, while the diffraction patterns clearly indicated ω-phase precipitation in an advanced formation stage. Finally, the radiation-induced ω-phase transformation in the β-phase could lead to greater loss of ductility in Ti-6Al-4V alloys in comparison with Ti-3Al-2.5V alloy with less β-phase.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: RaDIATE COLLABORATION

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1647076

Alternate ID(s):: OSTI ID: 1646542

Report Number(s):: FERMILAB-PUB-20-451-AD; oai:inspirehep.net:1792754; TRN: US2202468

Journal Information:: Journal of Nuclear Materials, Vol. 541; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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