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.; Prabhakaran, Ramprashad; Senor, David J.; Ammigan, Kavin; Bidhar, Sujit K.; Hurh, Patrick; Pellemoine, Frederique; Densham, Chris J.; Fitton, Michael; Bennett, Joe M.; Kim, Dohyun; Simos, N; Hagiwara, Masayuki; Kawamura, Naritoshi; Miego, 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 · Tue Dec 01 00:00:00 EST 2020 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2020.152413· OSTI ID:1661881

Ishida, Taku ^[1]; Wakai, Eiichi ^[2]; Makimura, Shunsuke ^[2];

^[3]; Edwards, Danny J. ^[3];

^[3]; Senor, David J. ^[3]; Ammigan, Kavin ^[4]; Bidhar, Sujit K. ^[2]; Hurh, Patrick ^[4]; Pellemoine, Frederique ^[4]; Densham, Chris J. ^[2]; Fitton, Michael ^[5]; Bennett, Joe M. ^[6]; Kim, Dohyun ^[7]; Simos, N ^[7]; Hagiwara, Masayuki ^[8]; Kawamura, Naritoshi ^[9]; Miego, Shin-Ichiro ^[10]; Yohehara, Katsuya ^[4]

J-PARC
VISITORS
BATTELLE (PACIFIC NW LAB)
Fermi National Accelerator Laboratory
STFC Rutherford Appleton Laboratory
Science and Technology Facilities Council, Rutherford Appleton Laboratory
Brookhaven National Laboratory
HIGH ENERGY ACCELERATOR RESEARCH INST.
J-PARC/KEK
J-PARC/JAEA

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 the beam center region with an irradiation temperature around 120 oC. Tensile tests showed increased hardness and a large decrease in ductility for the dual a+ß-phase Ti-6Al-4V Grade-5 and Grade-23 extra low interstitial alloys, with the near a-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 a-phase grain. The ß-phase grains did not contain any visible defects such as loops or black dots, while the diffraction patterns clearly indicated ?-phase precipitation in an advanced formation stage. The radiation-induced ?-phase transformation in the ß-phase could lead to greater loss of ductility in Ti-6Al-4V alloys in comparison with Ti-3Al-2.5V alloy with less ß-phase.google scho

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1661881

Report Number(s):: PNNL-SA-152944

Journal Information:: Journal of Nuclear Materials, Vol. 541

Country of Publication:: United States

Language:: English

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