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| DISTRIBUTION OF OXYGEN IN MOLYBDENUM-TITANIUM SOLID SOLUTIONS |
| SUNG CH-YI MA YING-LIANG |
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Cite this article:
SUNG CH-YI MA YING-LIANG. DISTRIBUTION OF OXYGEN IN MOLYBDENUM-TITANIUM SOLID SOLUTIONS. Acta Metall Sin, 1966, 9(2): 181-188.
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Abstract Internal friction in several molybdenum-titanium alloys containing oxygen was measured. Besides the 110℃ peak associated with the diffusion of oxygen between Mo-Mo interstitial sites, another peak around 55℃ was observed which was shown to be associated with the stress-induced micro-diffusion of oxygen between Mo-Ti interstitial sites. The activation energy for the latter process was found to be 22600 cal/g-atom. The condition for the appearance of the 55℃ peak is the presence of both titanium and oxygen in molybdenum.The partition functions and the potential energy difference of oxygen atoms in the two interstitial sites were calculated by means of a standard statistical method. Furthermore, it was shown that titanium would enlarge the solubility of oxygen in molybdenum, thus lowering the ductile-brittle transition temperature of molybdenum-titanium alloys.
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Received: 18 February 1966
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