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General methodology to estimate the dislocation density from microhardness measurements
journal contribution
posted on 2017-09-01, 00:00 authored by A A H Ameri, N N Elewa, Mahmud AshrafMahmud Ashraf, J P Escobedo-DiazA general methodology to estimate dislocation density in cubic metals using microhardness measurements has been established. The proposed methodology is based on the Indention Size Effect (ISE) and microstructural strengthening mechanisms. The methodology was validated using published experimental data of a pure Nickel (FCC) and Tungsten (BCC), as well as our own data on dual phase (BCC and FCC) lean duplex stainless steel 2101(LDSS 2101). The estimations of dislocation densities for LDSS 2101 phases were confirmed via X-ray diffraction measurements. Our results collectively validated the proposed approach as a general method to estimate dislocation density with acceptable accuracy.
History
Journal
Materials characterizationVolume
131Pagination
324 - 330Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1044-5803Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2017, ElsevierUsage metrics
Keywords
disclocation densityindentation and hardnessmicrostructurex-ray diffractionScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials Science, Characterization & TestingMaterials ScienceDislocation densityX-RAY-DIFFRACTIONSTRAIN GRADIENT PLASTICITYDUPLEX STAINLESS-STEELLINE-PROFILE ANALYSISINDENTATION SIZEHARDNESSNANOHARDNESSNUCLEATIONAUSTENITEEVOLUTIONMechanical Engineering