1970 Volume 28 Issue 4 Pages 1014-1023
Interstitial order-disorder transformation regarding oxygen atoms dissolved in alpha-titanium has been studied by neutron diffraction on single crystals in the range from 17 to 28 at% O. Occupation probabilities of the oxygen atoms in the octahedral interstitial sites are determined quantitatively with the variation of composition and temperature. The change of the long-range order with increasing temperature reveals a two-step process attributed to the disordering of the oxygen atoms. The static displacement of the titanium atoms parallel to the c-axis increases almost linearly with the oxygen concentration. The results are compared with the previous works in Parts I, II and III.
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