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Ultrasonic ranking of toughness of tungsten carbideThe feasibility of using ultrasonic attenuation measurements to rank tungsten carbide alloys according to their fracture toughness was demonstrated. Six samples of cobalt-cemented tungsten carbide (WC-Co) were examined. These varied in cobalt content from approximately 2 to 16 weight percent. The toughness generally increased with increasing cobalt content. Toughness was first determined by the Palmqvist and short rod fracture toughness tests. Subsequently, ultrasonic attenuation measurements were correlated with both these mechanical test methods. It is shown that there is a strong increase in ultrasonic attenuation corresponding to increased toughness of the WC-Co alloys. A correlation between attenuation and toughness exists for a wide range of ultrasonic frequencies. However, the best correlation for the WC-Co alloys occurs when the attenuation coefficient measured in the vicinity of 100 megahertz is compared with toughness as determined by the Palmqvist technique.
Document ID
19830015349
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vary, A. (NASA Lewis Research Center Cleveland, OH, United States)
Hull, D. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
April 1, 1983
Subject Category
Quality Assurance And Reliability
Report/Patent Number
NAS 1.15:83358
NASA-TM-83358
E-1619
Meeting Information
Meeting: Symp. on Nondestructive Evaluation
Location: San Antonio, TX
Country: United States
Start Date: April 19, 1983
End Date: April 21, 1983
Accession Number
83N23620
Funding Number(s)
PROJECT: RTOP 506-53-1A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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