Influence of layer thickness on mechanical properties of multilayered NiFe samples processed by electrodeposition. (15th January 2016)

• Record Type: Journal Article
• Authors: Kurmanaeva, L.; McCrea, J.; Jian, J.; Fiebig, J.; Wang, H.; Mukherjee, A.K.; Lavernia, E.J.
• Is Part Of: Materials & design. Volume 90(2016)
• Page Start: 389
• Page End: 395
• Publication Date: 2016-01-15
• Subjects: Ni–Fe -- Electrodeposition -- Multilayered structure -- Nanoindentation -- EDS; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.10.137
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Multilayered (ML) NiFe thick foils have been studied in order to provide insight in synthesizing structure-modulated sheets with superior mechanical properties. The specific electrodeposition parameters were selected to produce ML samples with modulated grain size distribution and layer thicknesses varied from 30 nm up to 5 μm. The influence of layer thickness on mechanical behavior was characterized by coupling nanoindentation tests and SEM/EDS study. Hardness results show that with decreasing layer thickness the strength of ML samples reaches a maximum value and remains relatively constant when layer thickness is less than 100 nm. The measured properties are discussed in the context of layer configuration, overall dimensions, and change in phase and chemical composition. Graphical abstract: Highlights: Pulsed electrodeposition from a single bath was used to prepare nanostructured multilayered materials with layer thicknesses in the range between 5 μm and 30 nm. An architecture with alternating layers of similar chemical composition, and layer modulation was accomplished by introducing changes in grain size. With decreasing of layer thickness the hardness of multilayered samples reached a maximum value of 5.9 GPa in the sample with 100 nm layer thickness. The elastic moduli of multilayered nanostructured samples was lower than that of typical Invar alloys with 64 wt. % Fe (141-148 GPa) and this was attributed to strain induced phase transformation.