Journal
SCIENTIFIC REPORTS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-00335-0
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Funding
- National Natural Science Foundation of China [51571075, 51274077, 51271068]
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The effect of substitution of Nb by Mo in Nb40Ti30Ni30 was investigated with respect to microstructural features and hydrogen dissolution, diffusion and permeation. As-cast Nb(40-x)MoxTi(30)Ni(30) (x=0, 5, 10) alloys consist of primary bcc-Nb phase and binary eutectic (bcc-Nb+B2-TiNi). The substitution of Nb by Mo reduces the hydrogen solubility in alloys, but may increase (x=5) or decrease (x=10) the apparent hydrogen diffusivity and permeability. As-cast Nb35Mo5Ti30Ni30 exhibits a combined enhancement of hydrogen permeability and embrittlement resistance as compared to Nb40Ti30Ni30 . This work confirms that Mo is a desirable alloying element in Nb that can contribute to a reduction in hydrogen absorption and an increase in intrinsic hydrogen diffusion, thus improving embrittlement resistance with minimal permeability penalty.
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