TY - JOUR
T1 - Modification of microstructure and hardness for Cu-Ti alloy by means of energetic ion beam irradiation
AU - Ueyama, D.
AU - Semboshi, S.
AU - Saitoh, Y.
AU - Hori, F.
AU - Nishida, K.
AU - Soneda, N.
AU - Iwase, A.
N1 - Funding Information:
This research was carried out under the collaboration program between Osaka Prefecture University and the Japan Atomic Energy Agency (JAEA) and under the collaboration program between Osaka Prefecture University and Central Research Institute of Electric Power Industry. A part of this research was financially supported by Osaka Nuclear Science Association (ONSA).
PY - 2014/12/15
Y1 - 2014/12/15
N2 - Cu-Ti alloys were irradiated with 5.4 MeV Al ions, 7.3 MeV Fe ions, 10 MeV I ions, and 16 MeV Au ions at room temperature and the Vickers microhardness was measured. The hardness once increases by the irradiation with a low fluence, and then it remains almost constant even with increasing the ion fluence. The change in hardness was well correlated with the density of energy deposited through the elastic collisions and not the electronic excitation. The observation of atom probe tomography (APT) did not show any Ti clusters in the irradiated specimens. This result suggests that not Ti clusters but lattic defects (interstitial atoms, vacancies and/or their aggregates) contributed to the increase in hardness of Cu-Ti alloys.
AB - Cu-Ti alloys were irradiated with 5.4 MeV Al ions, 7.3 MeV Fe ions, 10 MeV I ions, and 16 MeV Au ions at room temperature and the Vickers microhardness was measured. The hardness once increases by the irradiation with a low fluence, and then it remains almost constant even with increasing the ion fluence. The change in hardness was well correlated with the density of energy deposited through the elastic collisions and not the electronic excitation. The observation of atom probe tomography (APT) did not show any Ti clusters in the irradiated specimens. This result suggests that not Ti clusters but lattic defects (interstitial atoms, vacancies and/or their aggregates) contributed to the increase in hardness of Cu-Ti alloys.
KW - Cu-Ti
KW - Deposited energy density
KW - Ion-irradiation Vickers hardness
KW - Three-dimensional atom probe
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U2 - 10.1016/j.nimb.2014.06.033
DO - 10.1016/j.nimb.2014.06.033
M3 - Article
AN - SCOPUS:84914158585
VL - 341
SP - 53
EP - 57
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
ER -