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Hardmetals - microstructural design, testing and property maps

Abstract

The production of WC/Co hardmetals and their analogues is considered a mature technology, however lately there has been new research results where the concept of microstructural design was used to produce alternatives to the conventional two-phase structure. This Industry is currently well served by a range of baseline established standards, which, if properly followed with good attention to correct quality procedures, will ensure consistent products. However, there are certain key properties such as corrosion, fatigue, impact wear or high temperature strength and toughness that are often measured but not always by standard tests methods. Microstructural design potential is reviewed, particularly the possibilities of performance improvement via changes in size, shape and distribution of the phases as well as recent developments in testing, specifically S-N fatigue and abrasive wear. Finally, the concept of property mapping is introduced as a tool for providing a framework for optimizing properties. Its utility in correlating performance properties and their relationships with microstructural parameters is evaluated. Two property maps are discussed: one where the property is plotted against a microstructural feature (microstructure property maps) such as WC grain size or Co binder phase content against coercivity or hardness and one where different properties, such as hardness  More>>
Authors:
Roebuck, B; Gee, M G; Morrell, R [1] 
  1. NPL Materials Centre, National Physical Laboratory, Teddington, Middlesex (United Kingdom)
Publication Date:
Jul 01, 2001
Product Type:
Conference
Report Number:
INIS-AT-0034
Resource Relation:
Conference: 15. International Plansee seminar, Reutte (Austria), May 2001; Other Information: PBD: 2001; Related Information: In: Powder metallurgical high performance materials. Proceedings. Volume 4: late papers, by Kneringer, G.; Roedhammer, P.; Wildner, H. [eds.], 574 pages.
Subject:
36 MATERIALS SCIENCE; ABRASION; CERMETS; COERCIVE FORCE; DESIGN; FATIGUE; FRACTURE PROPERTIES; GRAIN SIZE; HARDNESS; MAGNETIC PROPERTIES; MATERIALS TESTING; MICROSTRUCTURE; PHASE STUDIES; TUNGSTEN CARBIDES; WEAR RESISTANCE
Sponsoring Organizations:
UK Department of Trade and Industry (United Kingdom)
OSTI ID:
20299675
Research Organizations:
Plansee Holding AG (Austria)
Country of Origin:
Austria
Language:
English
Other Identifying Numbers:
TRN: AT0200482060935
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
page(s) 245-266
Announcement Date:

Citation Formats

Roebuck, B, Gee, M G, and Morrell, R. Hardmetals - microstructural design, testing and property maps. Austria: N. p., 2001. Web.
Roebuck, B, Gee, M G, & Morrell, R. Hardmetals - microstructural design, testing and property maps. Austria.
Roebuck, B, Gee, M G, and Morrell, R. 2001. "Hardmetals - microstructural design, testing and property maps." Austria.
@misc{etde_20299675,
title = {Hardmetals - microstructural design, testing and property maps}
author = {Roebuck, B, Gee, M G, and Morrell, R}
abstractNote = {The production of WC/Co hardmetals and their analogues is considered a mature technology, however lately there has been new research results where the concept of microstructural design was used to produce alternatives to the conventional two-phase structure. This Industry is currently well served by a range of baseline established standards, which, if properly followed with good attention to correct quality procedures, will ensure consistent products. However, there are certain key properties such as corrosion, fatigue, impact wear or high temperature strength and toughness that are often measured but not always by standard tests methods. Microstructural design potential is reviewed, particularly the possibilities of performance improvement via changes in size, shape and distribution of the phases as well as recent developments in testing, specifically S-N fatigue and abrasive wear. Finally, the concept of property mapping is introduced as a tool for providing a framework for optimizing properties. Its utility in correlating performance properties and their relationships with microstructural parameters is evaluated. Two property maps are discussed: one where the property is plotted against a microstructural feature (microstructure property maps) such as WC grain size or Co binder phase content against coercivity or hardness and one where different properties, such as hardness and toughness are mapped against each other (comparative property maps). (nevyjel)}
place = {Austria}
year = {2001}
month = {Jul}
}