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Effect of titanium concentration in the D9 composition on the defect recovery has been investigated using positron lifetime measurements. As‐received and creep‐tested samples of 20% cold‐worked D9 having different weight percent of titanium namely, 0.18, 0.23, 0.25 and 0.36 have been investigated.As‐received Ti variants of D9 have also been isothermally annealed at 973 K and positron lifetime studies have been carried out to confirm the evolution of TiC precipitates during the initial annealing stages. These results are discussed in the light of TiC precipitation with our earlier work on isochronal annealing of cold‐worked D9. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Resonant nuclear reaction analysis can be used for the study of diffusion behaviour of minor alloying elements in reactor structural materials. In the present paper,15N(p,αγ)12Cand30Si(p,γ)31Preactions have been used to profile the ion-implanted15Nand30Siin D9 alloy (titanium-modified austenitic stainless steel). The diffusion coefficients at various temperatures have been estimated from the broadening of the implantation profiles during thermal annealing, and the activation energies are deduced.

Novel nanocarbon hybrids of single-walled carbon nanotubes and dispersed nanodiamond: Structure and hierarchical defects evolution irradiated with gamma rays