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The kinetics of formation and growth of TiC precipitates in Ti-modified stainless steel studied by positron annihilation spectroscopy by Padma Gopalan; R Rajaraman; B Viswanathan; K.P Gopinathan; S Venkadesan is a Materials Science article available to read on EtoBox.

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The formation and growth of TiC precipitates in Ti-modi®ed austenitic stainless steel (D-9 alloy) is monitored by positron lifetime spectroscopy. From isochronal annealing studies various recovery stages are identi®ed. TiC precipitates are found to be more stable in 20% cold worked alloy than in a 17.5% cold worked sample. From the isothermal annealing studies, it is found that TiC precipitation is controlled by dislocations. The limited temperature dependence of dislocation controlled TiC precipitation is governed by an apparent activation energy of 1.6 eV. In 20% cold worked alloy, TiC precipitates are found to be stable against growth even after 1000 h of annealing at 923 K. For higher annealing temperatures, TiC precipitate coarsening occurs due to recrystallisation.

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Author

Padma Gopalan; R Rajaraman; B Viswanathan; K.P Gopinathan; S Venkadesan

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-3115)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)