Fractal fracture and transformation toughening in CuNiAl single crystal

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

10 Scopus Citations
View graph of relations



Original languageEnglish
Pages (from-to)1337-1340
Journal / PublicationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number6
Publication statusPublished - 1997


The fracture toughness JIc(ρ) and fractal dimension Df of fractured surfaces of CuNiAl single crystal have been measured at temperatures in the range 20 °C to 120 °C, in which thermoelastic martensitic transformation takes place. The parent phase has higher fracture toughness than the martensite phase due to stress-induced transformation. The relationship between JIc(ρ) and Df has been studied. It was found that log JIc(ρ) is linearly related to Df if the failure involves a single mechanism. The slope of the plot may either be positive or negative for brittle or ductile failure, respectively. The difference in the JIc(ρ)-Df correlation can be understood in terms of the micromechanism of fracture.