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The fracture toughness of ultrafine WC-Co Alloys
Bibliography: pages 147-152.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Centre for Materials Engineering
2016
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| _version_ | 1867613935037841408 |
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| access_status_str | Open Access |
| author | Sacks, Natasha |
| author2 | Allen, Colin |
| author_browse | Allen, Colin Sacks, Natasha |
| author_facet | Allen, Colin Sacks, Natasha |
| author_sort | Sacks, Natasha |
| collection | Thesis |
| description | Bibliography: pages 147-152. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/20181 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:44:02.808Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Centre for Materials Engineering |
| publisherStr | Centre for Materials Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/20181 The fracture toughness of ultrafine WC-Co Alloys Sacks, Natasha Allen, Colin Materials Engineering Bibliography: pages 147-152. This thesis examines the fracture toughness behaviour of a series of cemented carbides having carbide grain sizes between 0.35f.Lm and 4f.Lm, cobalt contents ranging from 6 to 15wt%, and vanadium carbide contents from 0 to 0.8wt%. A series of twenty-four ultrafine WC-Co alloys were sintered from powders produced through three different production routes, namely, the spray conversion process and two variations of the conventional powder production methods. A further twelve WC-Co alloys with three different carbide grain size distributions were produced through conventional powder metallurgy processes. Two different fracture toughness test methods have been used to determine the toughness measurements, namely, the Palmqvist Indentation test and the Short Rod test. A Terra Tek Fractometer machine was used to automatically determine the Short Rod toughness values. The Palmqvist testing was carried out on a Vickers hardness machine using indenting loads of 20, 30 and 50kg. The Palmqvist crack lengths were measured by summing the individual crack lengths emanating from the corners of the hardness indentation. These crack lengths were used in a formula developed by Shetty et al., to calculate the Palmqvist fracture toughness. The influence of annealing at 800°C and 900°C on the Palmqvist crack lengths has also been assessed. Microstructural parameters have been determined using ASTM procedures and microscopy techniques and the influence of these parameters on the fracture toughness has also been assessed. 2016-07-04T08:39:44Z 2016-07-04T08:39:44Z 1999 Master Thesis Masters MSc http://hdl.handle.net/11427/20181 eng application/pdf Centre for Materials Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Materials Engineering Sacks, Natasha The fracture toughness of ultrafine WC-Co Alloys |
| thesis_degree_str | Master's |
| title | The fracture toughness of ultrafine WC-Co Alloys |
| title_full | The fracture toughness of ultrafine WC-Co Alloys |
| title_fullStr | The fracture toughness of ultrafine WC-Co Alloys |
| title_full_unstemmed | The fracture toughness of ultrafine WC-Co Alloys |
| title_short | The fracture toughness of ultrafine WC-Co Alloys |
| title_sort | fracture toughness of ultrafine wc co alloys |
| topic | Materials Engineering |
| url | http://hdl.handle.net/11427/20181 |
| work_keys_str_mv | AT sacksnatasha thefracturetoughnessofultrafinewccoalloys AT sacksnatasha fracturetoughnessofultrafinewccoalloys |