The microstructural evolution upon compressive loading was identified for metastable Ti-Nb-Ta-M (M=In, Ag, or Cr)β alloys with different phase stability against β→α" martensitic transformation. With increasing degree of deformation, martensitic transformation and deformation twinning are initially operative followed by slip of dislocations for the less stabilized In- and Ag-containing alloys, whereas slip is initially operative followed by fine deformation twinning for the relatively more stable Cr-containing alloy. As a result of the cumulative interactions between slip dislocations, α" martensite and deformation twins, a pronounced grain refinement of the β grains to the nanoscale (50~100 nm) occurs in the In- and Ag-containing alloys with low stacking fault energy. A plausible mechanism is proposed for the easy deformation-induced nanostructuring.
|Number of pages||10|
|Publication status||Published - 2010|
|Event||World Premier International Research Center Advanced Institute for Materials Research Annual Workshop - Miyagi Prefecture, Japan|
Duration: 1 Mar 2009 → 6 Mar 2009
|Workshop||World Premier International Research Center Advanced Institute for Materials Research Annual Workshop|
|City||Miyagi Prefecture, Japan|
|Period||1/03/09 → 6/03/09|