Full Content is available to subscribers

Subscribe/Learn More  >

Nanoindentation Characterization of Ultrafine-Grained Surface Layer by Turning Versus Grinding

[+] Author Affiliations
A. W. Warren, Y. B. Guo

University of Alabama, Tuscaloosa, AL

Paper No. MicroNano2008-70152, pp. 251-256; 6 pages
  • 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems
  • 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems
  • Clear Water Bay, Kowloon, Hong Kong, June 3–5, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4294-0 | eISBN: 0-7918-3819-6
  • Copyright © 2008 by ASME


Hard turning and grinding are competing precision machining processes for the manufacture of mechanical components such as bearings, gears, cams, etc. Surface hardening at gentle machining conditions has often been reported and is attributed to ultrafine-grained and size effect. However, there are controversial results about surface hardness. Due to the great importance of surface property to component performance such as fatigue and wear, it is imperative to clarify surface hardening mechanisms. The purpose of this paper is to investigate surface hardening and mechanism. Hard turning and grinding of AISI 52100 steel was conducted using gentle machining conditions. Surface integrity was then analyzed in terms of surface microstructure, microhardness, and nanohardness. The research findings showed that the apparent softening measured using microindentation in near surface is not due to thermal effects, but rather a misinterpretation of hardness values due to improper testing technique. Hard turning induces a thicker plastically deformed ultrafine-grained (50∼100 nm) layer than grinding. However, the grinding induced grain size may be smaller that by turning, which produces higher hardness on the ground surface.

Copyright © 2008 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In