TY - JOUR
T1 - Tribological properties of AlTIN coating in sliding contact with Ti6Al4V
T2 - A helpful tool for disentangling the phenomena complexity during real turning operations
AU - Tebaldo, Vincenzo
AU - Kilpi, Lauri
AU - Ronkainen, Helena
AU - Faga, Maria Giulia
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The study focuses on the evaluation of the parameters affecting friction, wear performance and mechanisms of uncoated and AlTiN coated WC-Co against Ti6Al4V. To this purpose tribological and turning tests were carried out. The tribological tests highlighted that the friction coefficient increased by increasing temperature, while decreased by enhancing sliding speed. Titanium transfer on both coated and uncoated balls was observed, indicating that adhesion phenomena occurred in large extent. As the main effect, AlTiN hindered Ti6Al4V adhesion, thus increasing the friction coefficient, which was linearly proportional to the amount of material transfer from the titanium alloy to the ball surface. Analogously, craterisation phenomena, usually caused by adhesion, were less evident in turning operation when using AlTiN coated tools. Also the highest temperature at the workpiece-cutting tool interface could be partially explained by the highest friction coefficient observed for AlTiN materials.
AB - The study focuses on the evaluation of the parameters affecting friction, wear performance and mechanisms of uncoated and AlTiN coated WC-Co against Ti6Al4V. To this purpose tribological and turning tests were carried out. The tribological tests highlighted that the friction coefficient increased by increasing temperature, while decreased by enhancing sliding speed. Titanium transfer on both coated and uncoated balls was observed, indicating that adhesion phenomena occurred in large extent. As the main effect, AlTiN hindered Ti6Al4V adhesion, thus increasing the friction coefficient, which was linearly proportional to the amount of material transfer from the titanium alloy to the ball surface. Analogously, craterisation phenomena, usually caused by adhesion, were less evident in turning operation when using AlTiN coated tools. Also the highest temperature at the workpiece-cutting tool interface could be partially explained by the highest friction coefficient observed for AlTiN materials.
KW - AlTiN coating
KW - Ball on disc
KW - Titanium alloy
KW - Turning tests
UR - http://www.scopus.com/inward/record.url?scp=85043377817&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2018.02.023
DO - 10.1016/j.triboint.2018.02.023
M3 - Article
AN - SCOPUS:85043377817
SN - 0301-679X
VL - 123
SP - 71
EP - 80
JO - Tribology International
JF - Tribology International
ER -