Specimens of a 9Cr–1 Mo steel have been deformed in tension at room temperature and the concentration and size distribution of deformation–induced carbide–nucleated voids was established as a function of strain. Additional specimens were annealed, after deformation, at 600 and 750°C, respectively; thin foils prepared from these specimens were used to monitor void shrinkage and the consequent reduction in void density as a function of annealing time. The results are compared with the behaviour predicted by an equation previously used by Volin and Balluffi to account for the shrinkage of ‘quenched-in’ voids in aluminium.
MST/213
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