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Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:The Chinese Journal of Nonferrous Metals

Volume:26

Issue:10

Page Number:2086-2092

ISSN No.:1004-0609

Key Words:"near alpha-Ti alloys; composition design; minor alloying; high-temperature oxidation"

CN No.:43-1238/TG

Abstract:The composition characteristics of near alpha-Ti alloy Ti 1100 with the guidance of a cluster-plus-glue-atom model were investigated. A new alloy series with the cluster formula of [Al-(Ti_(13.7)(Zr/Hf)_(0.3))](Al_(0.69)Sn_(0.18)Si_(0.12)-(Mo/Ta/Nb)_(0.03)) was designed by adding minor Hf, Ta, and Nb. The structures of alloys were characterized, and the oxidation resistance properties were measured. The results show that the Hf substitution for Zr doesn't influence the beta transition lamellar microstructure. While that various combinations of Ta and Nb to substitute for Mo could form equiaxed alpha microstructure. The oxidation-resistant capacities of designed alloys are enhanced obviously at 800 ℃ in comparison with that of Ti 1100. The oxidation mass gains of the designed alloys with Hf, Nb and Ta co-alloying after 100 h at 800 ℃ are about (2.20.2) mg/cm~2.

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