Instrumented Indentation of Carbides in a Martensitic Matrix and in a Sintered Sample

Instrumented Indentation of Carbides in a Martensitic Matrix and in a Sintered Sample Niobium carbide (NbC) has high wear and corrosion resistance and retains these characteristics at high temperatures. In industrial applications, as well as in academia, NbC can be found in various configurations, such as carbides dispersed in the microstructure of steel or as sintered components. The aim of this study is to use the instrumented indentation (nanoindentation) technique to evaluate the properties of carbides present in the martensitic matrix of a cast steel or as a sintered specimen. In the case of the cast alloy, the sample had an MC-type carbide volume fraction of approximately 5%. In the second case, the NbC specimen was sintered using spark-plasma sintering (SPS). Additional specimen characterization was conducted using X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX). Nanoindentation analyses were conducted with loads up to 10 mN, allowing hardness impressions with dimensions significantly smaller than the size of the carbides in the cast specimens. The results indicated relatively uniform values of 22 GPa and 348 GPa for the hardness and reduced elastic modulus of the sintered specimen, respectively. The EDX analysis results of the cast specimen indicated that the MC-type carbides had regions with different chemical compositions. Differences in the carbide chemical compositions were also observed when different regions of the cast specimen were compared. Nevertheless, similar properties were obtained in all regions, with a trend for the carbides in the cast specimen to present a higher hardness and lower modulus than those in the sintered specimen. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experimental Mechanics Springer Journals

Instrumented Indentation of Carbides in a Martensitic Matrix and in a Sintered Sample

Loading next page...
 
/lp/springer_journal/instrumented-indentation-of-carbides-in-a-martensitic-matrix-and-in-a-S9YUzHGGD0
Publisher
Springer US
Copyright
Copyright © 2017 by Society for Experimental Mechanics
Subject
Engineering; Continuum Mechanics and Mechanics of Materials; Characterization and Evaluation of Materials; Optics, Lasers, Photonics, Optical Devices; Structural Mechanics; Vibration, Dynamical Systems, Control; Classical Mechanics
ISSN
0014-4851
eISSN
1741-2765
D.O.I.
10.1007/s11340-017-0300-4
Publisher site
See Article on Publisher Site

Abstract

Niobium carbide (NbC) has high wear and corrosion resistance and retains these characteristics at high temperatures. In industrial applications, as well as in academia, NbC can be found in various configurations, such as carbides dispersed in the microstructure of steel or as sintered components. The aim of this study is to use the instrumented indentation (nanoindentation) technique to evaluate the properties of carbides present in the martensitic matrix of a cast steel or as a sintered specimen. In the case of the cast alloy, the sample had an MC-type carbide volume fraction of approximately 5%. In the second case, the NbC specimen was sintered using spark-plasma sintering (SPS). Additional specimen characterization was conducted using X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX). Nanoindentation analyses were conducted with loads up to 10 mN, allowing hardness impressions with dimensions significantly smaller than the size of the carbides in the cast specimens. The results indicated relatively uniform values of 22 GPa and 348 GPa for the hardness and reduced elastic modulus of the sintered specimen, respectively. The EDX analysis results of the cast specimen indicated that the MC-type carbides had regions with different chemical compositions. Differences in the carbide chemical compositions were also observed when different regions of the cast specimen were compared. Nevertheless, similar properties were obtained in all regions, with a trend for the carbides in the cast specimen to present a higher hardness and lower modulus than those in the sintered specimen.

Journal

Experimental MechanicsSpringer Journals

Published: Jun 14, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off