Improvement in tribological behavior of commercial pure titanium (CP-Ti) by surface mechanical attrition treatment (SMAT)

Improvement in tribological behavior of commercial pure titanium (CP-Ti) by surface mechanical... In the present work, commercial pure titanium (CP-Ti) samples were subjected to surface mechanical attrition treatment (SMAT) under different durations in order to improve surface properties and produce an ultrafine grain layer. Cross section and surface of SMATed samples were analyzed through optical microscopy (OM) and scanning electron microscopy (SEM) methods. The finest grain size on surface, measured with X-ray diffraction (XRD) test, was 12.2 nm. While the initial grain size was measured to be averagely 70 μm. Hardness of SMATed samples increased by 2.8 times. Increase in hardness was due to plastic deformation and work-hardening. SMAT led to improvement of wear properties in CP-Ti so that its friction coefficient decreased by 66%. On the other hand, wear rate of CP-Ti samples decreased by about 60%. According to the established relationships between hardness and wear rate, increase in surface hardness and creation of a deformed layer led to reduction of wear rate. Surface roughness continuously increased with SMAT. Surface roughness after SMAT was increased by almost 6 times. Increase in surface roughness was due to impact of balls on samples surfaces leading to formation of valleys and peaks. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology International Elsevier

Improvement in tribological behavior of commercial pure titanium (CP-Ti) by surface mechanical attrition treatment (SMAT)

Loading next page...
 
/lp/elsevier/improvement-in-tribological-behavior-of-commercial-pure-titanium-cp-ti-M9pAMxc9Ob
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0301-679X
eISSN
1879-2464
D.O.I.
10.1016/j.triboint.2017.11.044
Publisher site
See Article on Publisher Site

Abstract

In the present work, commercial pure titanium (CP-Ti) samples were subjected to surface mechanical attrition treatment (SMAT) under different durations in order to improve surface properties and produce an ultrafine grain layer. Cross section and surface of SMATed samples were analyzed through optical microscopy (OM) and scanning electron microscopy (SEM) methods. The finest grain size on surface, measured with X-ray diffraction (XRD) test, was 12.2 nm. While the initial grain size was measured to be averagely 70 μm. Hardness of SMATed samples increased by 2.8 times. Increase in hardness was due to plastic deformation and work-hardening. SMAT led to improvement of wear properties in CP-Ti so that its friction coefficient decreased by 66%. On the other hand, wear rate of CP-Ti samples decreased by about 60%. According to the established relationships between hardness and wear rate, increase in surface hardness and creation of a deformed layer led to reduction of wear rate. Surface roughness continuously increased with SMAT. Surface roughness after SMAT was increased by almost 6 times. Increase in surface roughness was due to impact of balls on samples surfaces leading to formation of valleys and peaks.

Journal

Tribology InternationalElsevier

Published: Mar 1, 2018

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