title: Mechanical properties and microstructural change of W-Y2O3 alloy under helium irradiation.
abstract: A wet-chemical method combined with spark plasma sintering was used to prepare a W-Y2O3 alloy. High-temperature tensile tests and nano-indentation microhardness tests were used to characterize the mechanical properties of the alloy. After He-ion irradiation, fuzz and He bubbles were observed on the irradiated surface. The irradiation embrittlement was reflected by the crack indentations formed during the microhardness tests. A phase transformation from α-W to γ-W was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Polycrystallization and amorphization were also observed in the irradiation damage layer. The W materials tended to exhibit lattice distortion, amorphization, polycrystallization and phase transformation under He-ion irradiation. The transformation mechanism predicted by the atomic lattice model was consistent with the available experimental observations. These findings clarify the mechanism of the structural transition of W under ion irradiation and provide a clue for identifying materials with greater irradiation resistance.
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Xiaoyue
authors.initials: X
authors.lastname: Tan
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Laima
authors.initials: L
authors.lastname: Luo
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Zan
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
authors.forename: Guangnan
authors.initials: G
authors.lastname: Luo
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
authors.forename: Junling
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Jigui
authors.initials: J
authors.lastname: Cheng
authors.affiliation: School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, People's Republic of China.
authors.forename: Dongping
authors.initials: D
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.|National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, People's Republic of China.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Wu