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Ta/Zr-Alloyed V–Cr–Ti Alloys via a Cluster-Plus-Glue-Atom Model for BCC Solid Solutions

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Abstract

A cluster formula of [M − V14]M1 was formed for vanadium alloys based on a cluster-plus-glue-atom model for BCC solid solutions, where the clusters [M − V14] were centered by one solute M and surrounded by fourteen solvent atoms V, and M could also be served as a glue atom to link clusters. The [M − V14]M1 formula with M = V1/3Cr1/3Ti1/3, an equal-molar combination of V, Cr and Ti, corresponded to the typical V–4Cr–4Ti alloy (wt.%). Based on this formula, a series of new alloys with Ta and Zr substitution for V and Ti respectively in M, were designed and molded into ϕ3 mm rods by copper-mold suction-cast method. These alloys were solid-solutioned at 1273 K for 2 h followed by water-quenching. For Zr-added alloys, the second phase V2Zr was prone to be precipitated, that made alloys much brittle and worse corrosion-resistant in Cl− solution. While Ta-alloyed alloys exhibited a single BCC structure, the Vickers hardness HV of alloys were enhanced obviously. Among them, the Ta-added alloy with M = Ta1/3Cr1/3Ti1/3 (V79.21Ta13.4Cr3.85Ti3.54 wt.%) displayed both higher microhardness and better corrosion-resistance in Cl− solution.

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Acknowledgments

The present work was financially supported by the National Natural Science Foundation of China (Nos. 11174044, 51131002 and 51171035), the International Science and Technology Cooperation Program of China (No. 2015DFR60370), and the Fundamental Research Funds for the Central Universities (No. DUT14LAB12).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    C. Pang, Q. Wang, J. D. Che, B. B. Jiang, G. Q. Chen & C. Dong

  2. Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China

    R. Q. Zhang, X. Dai & R. Tang

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  1. C. Pang
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  2. Q. Wang
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  3. J. D. Che
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  7. G. Q. Chen
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  8. R. Tang
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  9. C. Dong
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Correspondence to Q. Wang.

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Pang, C., Wang, Q., Che, J.D. et al. Ta/Zr-Alloyed V–Cr–Ti Alloys via a Cluster-Plus-Glue-Atom Model for BCC Solid Solutions. Trans Indian Inst Met 69, 1557–1562 (2016). https://doi.org/10.1007/s12666-015-0729-z

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  • DOI: https://doi.org/10.1007/s12666-015-0729-z

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