Defect recovery in proton irradiated Ti-modified stainless steel probed by positron annihilation

Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation

“…The subsequent decrease of these parameters with a minimum at 800°C was explained as caused by coarsening of the precipitates and decrease of positron trapping. Other authors studied cold worked Ti-modified D9 (15Ni-15Cr) austenitic SS and observed increase of the S-parameter or mean positron lifetime for the temperatures higher than 530°C which they attributed to positron trapping at precipitate-matrix interfaces of TiC precipitates in austenitic matrix [59][60][61]. The increase was not observed for the Tifree FeCrNi model alloy.…”

A study on the redistribution of ion-implanted nitrogen in Ti-modified austenitic steel

“…D9 is a Ti-modified austenitic stainless steel whose composition is enlisted in [11]. D9 samples have been solution annealed in vacuum at 1343 K for 30 min and subsequently at 1373 K for 5 min followed by furnace cooling.…”

Positron annihilation studies on D9 steel – Effect of Ti concentration

“…These results are discussed in the light of TiC precipitation with our earlier work on isochronal annealing of cold-worked D9. To explain the observations, we refer to our earlier work [9] wherein 20% cold-worked D9 (Ti 0.25 wt%) steel was isochronally annealed from 323 K to 1323 K in steps of 50 K for half-an-hour. Positron lifetime measurements were carried out at room temperature after each isochronal annealing treatment at various temperatures (Fig.…”