Improving the microstructure and mechanical properties of Zr-Ti alloy by nickel addition

JOURNAL OF ALLOYS AND COMPOUNDS

卷:737

Article

Liu, Chao¹  Qin, Jiaqian²  Feng, Zhihao^1,3  Zhang, Shiliang¹  Ma, Mingzhen¹  Zhang, Xinyu¹  Liu, Riping¹ 

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

[2] Chulalongkorn Univ, Met & Mat Sci Res Inst, Surface Coatings Technol Met & Mat Res Unit, Bangkok 10330, Thailand

[3] Hebei Univ Sci & Technol, Sch Mat Sci & Engn, Shijiiazhuang 050000, Peoples R China

关键词: Zr-Ti alloy;    Nickel addition;    C14 laves-phase;    Mechanical properties;   

DOI  :  10.1016/j.jallcom.2017.12.046

来源: Elsevier

【 摘 要 】

The microstructure and mechanical properties of (Zr-Ti)(1-chi)Ni-chi(chi = 0, 1, 3, and 5 wt.%) alloys were studied. With the addition of nickel (Ni), the phase composition of alloys changes from alpha phase to alpha phase + hexagonal close packed (hcp) C14 Laves-phase. The thickness of lamellar alpha phase decreases with increasing Ni content. Optical microscopy and transmission electron microscopy results indicated that C14 Laves-phase is formed on the boundary. The Zr-Ti-3wt.%Ni alloys exhibits better ultimate compressive strength and compressive plasticity (1715 MPa and 9.70%) than that of Zr-Ti alloys (1598 MPa and 12.40%). The decrease of the average thickness of the lamellar alpha-phases (from 0.183 mu m to 0.065 mu m) leads to the improvement of the strength of the alloy. Additionally, the solid solution strengthening and the second phase strengthening are also important reasons for the improvement of the strength. (c) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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