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Modeling effect of surface roughness on nanoindentation tests

Chen, Ling LU ; Ahadi, Aylin LU ; Zhou, Jinming LU and Ståhl, Jan-Eric LU (2013) 14th CIRP Conference on Modeling of Machining Operations (CIRP CMMO) 8. p.334-339
Abstract
Surface roughness is a commonly used criterion for characterization of surface quality in a machining operation. In the study of micro-scale mechanical properties of machined surface and cutting tool with nanoindentation, prefect surface finish on the test specimen is often required for the reliable result. However, the prefect surface finish is often difficult to obtain from the machining operation due to the limitation of the cutting tool geometry and machining dynamics. In presented paper, the effect of surface roughness on nanoindentation measurement was investigated by using finite element method. A 3D finite element model with three levels of surface roughness was developed to simulate the load-displacement indentation process with a... (More)
Surface roughness is a commonly used criterion for characterization of surface quality in a machining operation. In the study of micro-scale mechanical properties of machined surface and cutting tool with nanoindentation, prefect surface finish on the test specimen is often required for the reliable result. However, the prefect surface finish is often difficult to obtain from the machining operation due to the limitation of the cutting tool geometry and machining dynamics. In presented paper, the effect of surface roughness on nanoindentation measurement was investigated by using finite element method. A 3D finite element model with three levels of surface roughness was developed to simulate the load-displacement indentation process with a Berkovich indenter. The material used in the simulation is AISI 316L stainless steel and it was modeled as an elastic-plastic von Misses material. Three levels of surface roughness, Ra, are used in the simulation, including 2 nm, 20 nm and 37 nm. The mechanical properties were calculated by combined simulation with the Oliver-Pharr method. The hardness and reduced modulus from the simulation was found to decrease with an increase of roughness. The scatter of load-depth curves and deviation of hardness and reduced modulus are affected by the changing of roughness. The height of pile-up was little affected by the surface roughness from the simulation. Combined effect of indenter tip radius and surface roughness was also investigated. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Procedia CIRP
volume
8
pages
334 - 339
publisher
Elsevier
conference name
14th CIRP Conference on Modeling of Machining Operations (CIRP CMMO)
conference location
Turine, Italy
conference dates
2013-06-13 - 2013-06-14
external identifiers
  • scopus:84881182538
  • wos:000360917000057
ISSN
2212-8271
DOI
10.1016/j.procir.2013.06.112
language
English
LU publication?
yes
id
be72d950-058d-416a-b2d8-af302c4aa2f5 (old id 3734702)
date added to LUP
2013-05-06 10:04:30
date last changed
2019-04-30 02:01:51
@inproceedings{be72d950-058d-416a-b2d8-af302c4aa2f5,
  abstract     = {Surface roughness is a commonly used criterion for characterization of surface quality in a machining operation. In the study of micro-scale mechanical properties of machined surface and cutting tool with nanoindentation, prefect surface finish on the test specimen is often required for the reliable result. However, the prefect surface finish is often difficult to obtain from the machining operation due to the limitation of the cutting tool geometry and machining dynamics. In presented paper, the effect of surface roughness on nanoindentation measurement was investigated by using finite element method. A 3D finite element model with three levels of surface roughness was developed to simulate the load-displacement indentation process with a Berkovich indenter. The material used in the simulation is AISI 316L stainless steel and it was modeled as an elastic-plastic von Misses material. Three levels of surface roughness, Ra, are used in the simulation, including 2 nm, 20 nm and 37 nm. The mechanical properties were calculated by combined simulation with the Oliver-Pharr method. The hardness and reduced modulus from the simulation was found to decrease with an increase of roughness. The scatter of load-depth curves and deviation of hardness and reduced modulus are affected by the changing of roughness. The height of pile-up was little affected by the surface roughness from the simulation. Combined effect of indenter tip radius and surface roughness was also investigated.},
  author       = {Chen, Ling and Ahadi, Aylin and Zhou, Jinming and Ståhl, Jan-Eric},
  issn         = {2212-8271},
  language     = {eng},
  location     = {Turine, Italy},
  pages        = {334--339},
  publisher    = {Elsevier},
  title        = {Modeling effect of surface roughness on nanoindentation tests},
  url          = {http://dx.doi.org/10.1016/j.procir.2013.06.112},
  volume       = {8},
  year         = {2013},
}