Relationship between martensitic plate size and austenitic grain size in martensitic transformations

P. LA ROCA; L. ISOLA; J.A.MALARRÍA; PH. VERMAUT

APPLIED PHYSICS LETTERS

AMER INST PHYSICS

Lugar: New York; Año: 2015 vol. 106 p. 221903 - 221903

0003-6951

A systematic experimental analysis based on an assessment of the mean martensite plate size (h_plate) in subgrain domains was implemented to characterize the martensite morphology in polycrystalline Cu-based shape memory alloys. In the grain size range below 100 μm, a linear relationship between the average width of the martensite plates and the mean grain size was obtained for a thermal-induced martensite transformation (TMT). This evaluation allows us to perform an analysis of how microstructural length scales affect the martensitic transformation.