Fabrication and nanostructured surface layers of Al alloy by surface vibrational mechanical attrition

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)329-334
Journal / PublicationMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2002
Externally publishedYes


TitleSurface Engineering 2001 - Fundamentals and Applications
PlaceUnited States
CityBoston, MA
Period26 - 29 November 2002


Nanograins were introduced into the surface layers of an Al-alloy during surface vibrational mechanical attrition. Transmission electron microscopy revealed that microstructures developed with an increase in strain, in the following sequence, i.e., lamellar microbands of elongated subgrains, equiaxed submicro-, and nano-grains respectively. The grain subdivision into the subgrains was found to be the main mechanism responsible for grain refinement. The simultaneous evolution of high boundary misorientations was ascribed to the boundary rotation for accommodating further strains. Results showed that the grains could refine remarkably into the nanometer regime (