The Braking Behaviors of Cu-Based Metallic Brake Pad for High-Speed Train Under Different Initial Braking Speed

The Braking Behaviors of Cu-Based Metallic Brake Pad for High-Speed Train Under Different Initial... The purpose of this research was to study the braking behaviors of Cu-based composite pad under real operating conditions of high-speed train. A series of pad-on-disk braking tests was performed with the initial braking speed (IBS) from 80 to 380 km/h. Results showed that the coefficient of friction (COF) of the brake pad demonstrated a three-stage feature with the increase in IBS. It decreased from 0.395 to 0.358 with the increase in IBS from 80 to 200 km/h, then increased to 0.398 when IBS reached 320 km/h; and fell again to 0.379 at 380 km/h. Similarly, the pad also displayed three wear regimes as IBS increased, i.e., (1) mild wear (80–160 km/h), (2) moderate wear (200–250 km/h), and (3) severe wear (300–380 km/h). Surface morphologies and phase analyses indicate that the evolution of the COF mainly depends upon the state of friction film. The formation or completion of friction film regularly contributes to a lower COF and wear rate, while the destruction of friction film results in a higher COF and wear rate. Besides, the “lubricants” induced by high braking temperature are also responsible for the change in the COF. As IBS increased, the key wear mechanisms changed from abrasion, plowing, and oxidation to delamination at 250 km/h. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology Letters Springer Journals

The Braking Behaviors of Cu-Based Metallic Brake Pad for High-Speed Train Under Different Initial Braking Speed

Loading next page...
 
/lp/springer_journal/the-braking-behaviors-of-cu-based-metallic-brake-pad-for-high-speed-fU7hKNWBhG
Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Materials Science; Tribology, Corrosion and Coatings; Surfaces and Interfaces, Thin Films; Theoretical and Applied Mechanics; Physical Chemistry; Nanotechnology
ISSN
1023-8883
eISSN
1573-2711
D.O.I.
10.1007/s11249-017-0914-9
Publisher site
See Article on Publisher Site

Abstract

The purpose of this research was to study the braking behaviors of Cu-based composite pad under real operating conditions of high-speed train. A series of pad-on-disk braking tests was performed with the initial braking speed (IBS) from 80 to 380 km/h. Results showed that the coefficient of friction (COF) of the brake pad demonstrated a three-stage feature with the increase in IBS. It decreased from 0.395 to 0.358 with the increase in IBS from 80 to 200 km/h, then increased to 0.398 when IBS reached 320 km/h; and fell again to 0.379 at 380 km/h. Similarly, the pad also displayed three wear regimes as IBS increased, i.e., (1) mild wear (80–160 km/h), (2) moderate wear (200–250 km/h), and (3) severe wear (300–380 km/h). Surface morphologies and phase analyses indicate that the evolution of the COF mainly depends upon the state of friction film. The formation or completion of friction film regularly contributes to a lower COF and wear rate, while the destruction of friction film results in a higher COF and wear rate. Besides, the “lubricants” induced by high braking temperature are also responsible for the change in the COF. As IBS increased, the key wear mechanisms changed from abrasion, plowing, and oxidation to delamination at 250 km/h.

Journal

Tribology LettersSpringer Journals

Published: Sep 6, 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 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

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
Access to DeepDyve database
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off