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Effect of Nb Addition on Properties of TiZr-based Amorphous Alloys |
ZHANG Yiming, ZHAO Ziyan, MU Juan( ) |
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Sciences and Engineering, Northeastern University, Shenyang 110004, China |
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Cite this article:
ZHANG Yiming, ZHAO Ziyan, MU Juan. Effect of Nb Addition on Properties of TiZr-based Amorphous Alloys. Chinese Journal of Materials Research, 2022, 36(6): 401-408.
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Abstract TiZr-based amorphous alloys with different Nb amount, given by (Ti45.7Zr33Ni3Cu5.8Be12.5)(1-0.01x)Nb x (x=0, 2, 4, 6, 8, and 10, denoted as Nb0, Nb2, Nb4, Nb6, Nb8, and Nb10) were prepared via copper mold casting method. Then the effect of Nb addition on the performance of the alloys was investigated by means of uniaxial compression testing, XRD, TEM and SEM+EDS. The results show that with the increasing Nb content the grain size and volume fraction of the β-phase increased, but the deformation-induced martensitic transformation was suppressed; The plasticity of the amorphous alloys was greatly improved, while the yield strength gradually decreased. Notably, the repeatability of the mechanical properties of the amorphous alloys was improved with the addition of Nb. For the amorphous alloys that may undergo deformation-induced phase transformation, such as Nb0~Nb4, homogenous α'' martensite with a small lath can effectively induce the formation of multiple shear bands. For the amorphous alloys that cannot undergo deformation-induced phase transformation, such as Nb6~Nb10, many dislocations may occur in the β-phase and they accumulated at boundaries to form dislocation steps, which would trigger the formation of multiple shear bands and finally improve the plasticity of amorphous alloys.
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Received: 09 March 2021
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Fund: National Natural Science Foundation of China(51771049);National Natural Science Foundation of China(51790484);National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact(JCKYS2020602005) |
About author: MU Juan, Tel: 15326117696, E-mail: muj@atm.neu.edu.cn
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