Dislocation sub-structures in stainless steel which had been deformed in creep were investigated by means of transmission electron microscopy. Creep tests were carried out at 823, 873 or 923K, using a wide range of stresses. The rupture lives ranged from 100 to 139000h. The dislocation sub-structure was found to depend upon the test temperature and stress. Uniformly distributed dislocations, dislocation cells, equiaxed sub-grains and elongated sub-grains were observed; depending upon the test conditions.

Dislocation Sub-Structure and Precipitation in Type-316 Stainless Steel Deformed in Creep M.D.Mathew, M.Sundararaman, S.L.Mannan: Materials Transactions, 1997, 38[1], 37-42