Author/Authors :
Sahoo، نويسنده , , S.K. and Hiwarkar، نويسنده , , V.D. and Jain، نويسنده , , L. and Samajdar، نويسنده , , I. and Pant، نويسنده , , P. and Dey، نويسنده , , G.K. and Srivastav، نويسنده , , D. and Tewari، نويسنده , , C. H. ahn and R. K. Banerjee ، نويسنده , , S.، نويسنده ,
Abstract :
Two types, A and B, of Zr–2.5Nb samples were subjected to compression tests. Both samples consisted of similar microstructure – hexagonal closed packed (hcp) α phase (the primary phase) and grain boundary bcc (body centered cubic) β phase. However, the hardness of the β phase differed between the samples – respectively being hard (sample A) and soft (sample B) relative to the primary phase. This difference was caused by the presence of fine ω precipitates. The relative hardness of β phase determined almost all aspects of deformed microstructure developments. In sample A, the primary phase had higher lattice strain and in-grain misorientation developments. In sample B, on the other hand, the softer β phase was clearly linked to more deformation twinning and associated grain size refinement and ‘texturing’ of the hcp α phase.
