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A comparative assessment of iron and cobalt-based hard-facing alloy deformation using HR-EBSD and HR-DIC
File | Description | Size | Format | |
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Hard facings - Acta.pdf | Accepted version | 3.01 MB | Adobe PDF | View/Open |
Title: | A comparative assessment of iron and cobalt-based hard-facing alloy deformation using HR-EBSD and HR-DIC |
Authors: | Zhao, C Stewart, D Jiang, J Dunne, FPE |
Item Type: | Journal Article |
Abstract: | Three iron-based alloys (Nitronic 60, Tristelle 5183 and RR2450) and a cobalt alloy (Stellite 6) are studied using bend-testing to induce progressive straining and both high resolution DIC and EBSD are utilized to provide quantitative characterization of the deformation mechanisms. The roles of austenite, ferrite and carbide/silicide phases are investigated, together with how each contributes to slip activation and localisation, GND development and hardening through to particle pull-out and fracture. The observed mechanisms are discussed in the context of galling performance. The results suggest that a distribution of fine precipitates, both intra-granular and at grain/phase boundaries, promote more homogeneous and distributed slip, and the development of distributed higher densities of GNDs. The latter promotes hardening which in turn also facilitates homogeneity of deformation and potentially better galling resistance. A uniform size of fine precipitates is also helpful; large silicides lead to particle fracture and pull-out, likely highly damaging under conditions of sliding contact and galling. |
Issue Date: | 15-Oct-2018 |
Date of Acceptance: | 12-Aug-2018 |
URI: | http://hdl.handle.net/10044/1/68967 |
DOI: | https://dx.doi.org/10.1016/j.actamat.2018.08.021 |
ISSN: | 1359-6454 |
Publisher: | Elsevier |
Start Page: | 173 |
End Page: | 186 |
Journal / Book Title: | Acta Materialia |
Volume: | 159 |
Copyright Statement: | © 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Keywords: | Science & Technology Technology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Hard-facing alloys EBSD DIC Galling HARDFACING ALLOYS WEAR-RESISTANCE DISLOCATION DENSITY STEELS COPPER DISTRIBUTIONS TEMPERATURE BOUNDARIES BEHAVIOR GRAIN 0912 Materials Engineering 0913 Mechanical Engineering Materials |
Publication Status: | Published |
Online Publication Date: | 2018-08-15 |
Appears in Collections: | Mechanical Engineering Materials |