Secondary phases effects on microstructure and mechanical properties of lanthanum-doped titanium‑zirconium‑molybdenum alloy

The size of the secondary phases affects the lanthanum-doped titanium‑zirconium‑molybdenum (La-TZM) alloy properties. In this study, the microstructure and mechanical properties of the La-TZM alloys were regulated by adding carbon and Ti/Zr elements, which resulted in different secondary phase chara...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 2021-02, Vol.95, p.105439, Article 105439
Main Authors: Hu, Bo-liang, Wang, Kuai-she, Hu, Ping, Xing, Hai-rui, Li, Shi-Lei, Ge, Song-wei, Han, Jia-yu, Hua, Xing-jiang, Fu, Jing-bo, Volinsky, Alex A.
Format: Article
Language:English
Subjects:
Alloys
La-TZM alloy
Lanthanum
Mechanical properties
Microstructure
Molybdenum
Molybdenum base alloys
Regulation
Secondary phases
Titanium carbide
Yield strength
Yield stress
Zirconium carbide
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Summary:The size of the secondary phases affects the lanthanum-doped titanium‑zirconium‑molybdenum (La-TZM) alloy properties. In this study, the microstructure and mechanical properties of the La-TZM alloys were regulated by adding carbon and Ti/Zr elements, which resulted in different secondary phase characteristics. Adding nano-TiC and ZrC decreased the micron secondary phase size of the La-TZM alloy by 26.7%, and increased the yield strength by 27%, reaching 1239 MPa. The effects of secondary phase size and distribution on yield strength were analyzed. This study contributes to the design and theoretical analysis of new molybdenum alloys. •Average size of micron secondary phases doped nano-TiC/ZrC is reduced by 26.7%.•The yield strength of doping nano TiC-ZrC alloy improved 22.6%, reaching 1239.42 MPa.•The effect of secondary phase size on yield strength were calculated.•The effect of secondary phase distribution on grain size were analyzed.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2020.105439