Details
| Original language | English |
|---|---|
| Pages (from-to) | 613-616 |
| Number of pages | 4 |
| Journal | Advanced Engineering Materials |
| Volume | 10 |
| Issue number | 7 |
| Early online date | 16 Jul 2008 |
| Publication status | Published - Jul 2008 |
Abstract
A model, which explains cohesive damage of PVD coated carbide cutting tools by the residual stress state of the coating-substrate composites, prognoses a critical damage zone in the substrate's subsurface. This model could be proven experimentally. In fact there is a range, which shows tensile residual stress even in unloaded state. For the complete confirmation of the model, i. e. that the tool's residual stress state is the only reason for the occurrence of cohesive damage, cutting tests with "perfect" coatings will have to be performed. This will be subject to further investigations. It was shown furthermore that strong compressive stress of the substrate is reduced by the coating process. Moderate compressive stress only shows minor changes and stress free specimens show moderate compressive stress after coating. Currently applied process chains induce mainly strong compressive stress into the substrate's subsurface. The development of new processes for the production of coated carbide cutting tools has to consider the residual stress state of the complete tool. Therefore residual stress depth distributions for stress reduced or stress free tools have to be determined, and more cutting tests have to be performed. The goal is to define a stress state which avoids tool damage due to residual stress.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Advanced Engineering Materials, Vol. 10, No. 7, 07.2008, p. 613-616.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of the Residual Stress State on Cohesive Damage of PVD-Coated Carbide Cutting Tools
AU - Denkena, Berend
AU - Breidenstein, Bernd
PY - 2008/7
Y1 - 2008/7
N2 - A model, which explains cohesive damage of PVD coated carbide cutting tools by the residual stress state of the coating-substrate composites, prognoses a critical damage zone in the substrate's subsurface. This model could be proven experimentally. In fact there is a range, which shows tensile residual stress even in unloaded state. For the complete confirmation of the model, i. e. that the tool's residual stress state is the only reason for the occurrence of cohesive damage, cutting tests with "perfect" coatings will have to be performed. This will be subject to further investigations. It was shown furthermore that strong compressive stress of the substrate is reduced by the coating process. Moderate compressive stress only shows minor changes and stress free specimens show moderate compressive stress after coating. Currently applied process chains induce mainly strong compressive stress into the substrate's subsurface. The development of new processes for the production of coated carbide cutting tools has to consider the residual stress state of the complete tool. Therefore residual stress depth distributions for stress reduced or stress free tools have to be determined, and more cutting tests have to be performed. The goal is to define a stress state which avoids tool damage due to residual stress.
AB - A model, which explains cohesive damage of PVD coated carbide cutting tools by the residual stress state of the coating-substrate composites, prognoses a critical damage zone in the substrate's subsurface. This model could be proven experimentally. In fact there is a range, which shows tensile residual stress even in unloaded state. For the complete confirmation of the model, i. e. that the tool's residual stress state is the only reason for the occurrence of cohesive damage, cutting tests with "perfect" coatings will have to be performed. This will be subject to further investigations. It was shown furthermore that strong compressive stress of the substrate is reduced by the coating process. Moderate compressive stress only shows minor changes and stress free specimens show moderate compressive stress after coating. Currently applied process chains induce mainly strong compressive stress into the substrate's subsurface. The development of new processes for the production of coated carbide cutting tools has to consider the residual stress state of the complete tool. Therefore residual stress depth distributions for stress reduced or stress free tools have to be determined, and more cutting tests have to be performed. The goal is to define a stress state which avoids tool damage due to residual stress.
UR - http://www.scopus.com/inward/record.url?scp=49249112755&partnerID=8YFLogxK
U2 - 10.1002/adem.200800063
DO - 10.1002/adem.200800063
M3 - Article
AN - SCOPUS:49249112755
VL - 10
SP - 613
EP - 616
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
SN - 1438-1656
IS - 7
ER -