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Microstructure and properties of hydrogenated TB8 alloy

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Abstract

Thermohydrogen processing can enhance workability, decrease flow stress and deforming temperature of titanium alloys. In this study, thermohydrogen processing was carried out for metastable β-type TB8 alloy. The microstructures of hydrogenated TB8 alloy were investigated based on scanning electron microscopy (SEM), transmission electronic microscopy (TEM) as well as X-ray diffraction (XRD) analysis. The results reveal that δ hydride phase forms in the hydrogenated TB8 alloy, but the amount of β phase increases with hydrogen content increasing. Single β phase appears when the hydrogen content reaches 0.7 wt%. The alloying elements redistribute in the hydrogenated TB8 alloy, and hydrogen leads to the reduction of the alloying elements in β phase. The room-temperature compression tests were performed on a MTS809 machine. It is found that the room-temperature yield strength of hydrogenated TB8 alloy decreases. And minimum yield strength is obtained at a hydrogen content of 0.5 wt%. The ductility does not decrease within 0.7 wt% hydrogen content. These results provide theoretical basis for improving the formability and promoting the applications of TB8 alloy.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Nos. 51175137 and 51205102), and the Anhui Provincial Natural Science Foundation (No. 1308085JGD02).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China

    Ping Li, Bao-Guo Yuan, Ke-Min Xue & Zheng Jiang

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  1. Ping Li
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  2. Bao-Guo Yuan
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Correspondence to Ping Li.

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Li, P., Yuan, BG., Xue, KM. et al. Microstructure and properties of hydrogenated TB8 alloy. Rare Met. 36, 242–246 (2017). https://doi.org/10.1007/s12598-014-0260-0

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