TY - JOUR
T1 - Temperature-dependent helium induced microstructural evolution in equiatomic NiCo and NiFe concentrated solid solution alloys
AU - Liu, Shaofei
AU - Chen, Da
AU - Zhao, Shijun
AU - Lin, Weitong
AU - Meng, Fanling
AU - Zhao, Yilu
AU - Yeli, Guma
AU - He, Feng
AU - Li, Yiran
AU - Niu, Huan
AU - Kai, Ji jung
N1 - Publisher Copyright:
© 2020
PY - 2021/3
Y1 - 2021/3
N2 - Irradiation temperature and the species of elemental constituents are two pivotal factors in determining the helium (He) radiation behaviors. However, their synergistic effect on the He-induced defect evolution in single-phase concentrated solid-solution alloys (SP-CSSAs) has rarely been studied. In this work, the evolution of He cavities and dislocation structural damages in two equiatomic SP-CSSAs, i.e., NiCo and NiFe, were investigated at 673 K, 773 K and 873 K with 275 keV He+ ions. He cavity formation behaviors were diverse at different temperature regimes. NiFe was found to have a stronger suppression effect on He cavity growth at 673 K. However, with the increasing temperature, a more pronounced increment of He cavity size was exhibited in NiFe. Unlike the evolution of He cavities, the growth of dislocation loops tends to be delayed in NiFe over the studied irradiation temperatures. The underlying mechanisms for the temperature-dependent defect evolution in NiCo and NiFe are discussed.
AB - Irradiation temperature and the species of elemental constituents are two pivotal factors in determining the helium (He) radiation behaviors. However, their synergistic effect on the He-induced defect evolution in single-phase concentrated solid-solution alloys (SP-CSSAs) has rarely been studied. In this work, the evolution of He cavities and dislocation structural damages in two equiatomic SP-CSSAs, i.e., NiCo and NiFe, were investigated at 673 K, 773 K and 873 K with 275 keV He+ ions. He cavity formation behaviors were diverse at different temperature regimes. NiFe was found to have a stronger suppression effect on He cavity growth at 673 K. However, with the increasing temperature, a more pronounced increment of He cavity size was exhibited in NiFe. Unlike the evolution of He cavities, the growth of dislocation loops tends to be delayed in NiFe over the studied irradiation temperatures. The underlying mechanisms for the temperature-dependent defect evolution in NiCo and NiFe are discussed.
KW - Dislocation loop
KW - He cavity
KW - Irradiation temperature
KW - Single-phase concentrated solid-solution alloy
UR - http://www.scopus.com/inward/record.url?scp=85098459846&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2020.152715
DO - 10.1016/j.jnucmat.2020.152715
M3 - 文章
AN - SCOPUS:85098459846
SN - 0022-3115
VL - 545
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
M1 - 152715
ER -