期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2022.143308
关键词
Zi-Ti alloy; Phase composition; Mechanical properties; Corrosion performance
类别
资金
- National Natural Science Foundation of China [51801052]
- China Postdoctoral Science Foun-dation [2021M700490]
- Postdoctoral Science Foundation of Hebei [B2020005005]
- Natural Science Foundation of Tianjin City China [19JCZDJC38300]
- Foundation Strengthening Program [2019-JCJQ-00]
By increasing the Ni content, the (Zr-Ti)2Ni Laves phase content of the alloy was enhanced. The elastic modulus and yield strength of the alloys with Ni element were significantly increased, and part of the alloy's compressive strength was improved. Additionally, the corrosion resistance of the alloys was also significantly improved.
A series of (50Zr-50Ti)-xNi alloys were prepared by employing the vacuum arc melting method within a furnace. The phase composition and microstructure of the (50Zr-50Ti)-xNi alloys were analyzed by performing TEM, XRD measurements and other microscopic analysis methods. In addition, the mechanical and corrosion properties of the (50Zr-50Ti)-xNi alloys were analyzed by carrying out both compression and electrochemical tests. By increasing the Ni content, an enhancement in the (Zr-Ti)2Ni Laves phase content of the alloy was detected. Compared with the Zr-Ti binary alloy, the compressive ductility of the (50Zr-50Ti)-xNi alloys is decreased, while both exhibit brittle fracture. However, both the elastic modulus and yield strength of the (50Zr-50Ti)-xNi alloys with Ni element are significantly increased, and part of the alloy's compressive strength is improved. The alloy has a maximum compressive strength of 1615 MPa and a maximum yield strength of 1075 MPa. The corrosion resistance of the alloys are also significantly improved due to the stabilizing effect of the Ni element on the passivation film. The alloy has the best corrosion resistance when the Ni content is 4 at%.
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