Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 59, Issue -, Pages 14-21Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2012.02.024
Keywords
Nanomachining; Nanoindentation; Molecular dynamics; Plasticity; Subsurface damage
Categories
Funding
- National Natural Science Foundation of China [50575058, 50605012]
- ThyssenKrupp AG
- Bayer Material Science AG
- Salzgitter Mannesmann Forschung GmbH
- Robert Bosch GmbH
- Benteler Stahl/Rohr GmbH
- Bayer Technology Services GmbH
- state of NorthRhine Westfalia/Germany
- European Commission
Ask authors/readers for more resources
In this paper it is demonstrated how nanoindentation can be used to assess the subsurface damage induced by nanomachining. To accomplish this, a characteristic difference in the nanoindentation response between plastically deformed and undeformed material is exploited. Classical molecular dynamics simulations are performed to investigate the elementary mechanisms of the irreversible plastic processes that occur during nanomachining of a copper single crystal. To mimic the experimental characterization of subsurface damage, we perform nanoindentation simulations into the machined surface. The results show that the critical contact pressure required for dislocation nucleation, i.e. the pop-in load, decreases continuously with increasing machining depth, while the indentation hardness seems widely unaffected by prior nanomachining. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available