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dc.contributor.authorGVK, Sai Srikanthen_US
dc.contributor.authorTan, Ming Jenen_US
dc.contributor.authorLiu, Zhenyunen_US
dc.identifier.citationGVK, S. S., Tan, M. J. & Liu, Z. (2019). Plastic Instability in Co-Cr-Ni-Mo alloy wires drawn with different drawing practices. Materials Science and Engineering A, 747, 80-97.
dc.description.abstractPlastic instability of Co-35Ni-20Cr-10Mo alloy was studied by inflicting the material to the different drawing process, namely Full Die Drawing (FDD) and Half Die Drawing (HDD). The wires were subjected to different plastic deformations, by varying the amount of cold work (CW) reduction, and the strain hardening exponent (γ) and strain rate sensitivity (m) were determined from the logarithmic plots of the true stress and strain curves. The experimental results indicated that wires drawn with FDD practice, when compared with the HDD drawn wires, had a lower instability until 75% CW, after which it increased significantly when drawn to 95% CW. The lower instability in the FDD wires at 75% CW, was attributed to the smaller grain size, higher dislocation density and lower twin spacing which contributed to higher γ and m. Plastic strain localization because of shear band formation was noticed in the FDD 95% CW wires, which contributed to lowered ductility and increased instability in the wire due to reduced γ and m. This phenomenon was not observed in HDD wires. Therefore, the results illustrate that the drawing technique employed to process the material has a significant impact on the plastic instability of the material, with the FDD practice recommended for lower CW deformations and HDD for higher CW deformations.en_US
dc.description.sponsorshipEconomic Development Board (EDB)en_US
dc.relation.ispartofMaterials Science and Engineering Aen_US
dc.rights© 2019 Elsevier B.V. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titlePlastic Instability in Co-Cr-Ni-Mo alloy wires drawn with different drawing practicesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.organizationResearch & Development, Heraeus Materials Singapore Pte Ltden_US
dc.subject.keywordsPlastic Instabilityen_US
dc.subject.keywordsStrain Rate Sensitivityen_US
dc.description.acknowledgementThis work was supported financially by EDB (Economic Development Board) Singapore (COY-15-IPP-140010/198501914Z) under the EDB-IPP scheme through a grant to Heraeus Materials Singapore Pte Ltd Singapore.en_US
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