Fig. 4: Interstitial O and its correction.

a The O contents of the alloys determined by HCGE in at%. N contents were below 200 at-ppm for all alloys. b Vickers hardness H of quenched Ti-9Mo solid solutions as a function of O content xO, taken from ref. 28. The green line shows a Labusch-like fit to the data. The dashed part indicates the extrapolation to zero O. As reference, the top axis shows the O content wO in wt%. The range of O correction by extrapolation is shown as single-hatched area in both images. The double-hatched area indicates the range of O correction by interpolation.