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Effect of Machining Parameters on Cutting Force and Surface Integrity when High-Speed Turning AD730™ with PCBN Tools
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Division of Production and Materials Engineering, Lund University, Lund, Sweden.
Seco Tools AB, Fagersta, Sweden.
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2019 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 100, no 9-12, p. 2601-2615Article in journal (Refereed) Published
Abstract [en]

The novel wrought nickel-based superalloy, AD 730™, is a good candidate material for turbine disc applications at high temperatures beyond 650 °C. The present study focuses on the machining performance of this newly developed alloy under high-speed turning conditions with advanced PCBN tools. Meanwhile, the machined surface integrity as influenced by cutting speed and feed rate was also investigated. The surface integrity was thoroughly characterized in terms of surface roughness and morphology, machining-induced plastic deformation, white layer formation, and residual stresses. It has been found that the cutting speed and feed rate had a strong effect on the cutting forces and resultant surface integrity. The cutting forces required when machining the alloy were gradually reduced with increasing cutting speed, while at 250 m/min and above, the flank tool wear became stronger which led to increased thrust force and feed force. A higher feed rate, on the other hand, always resulted in higher cutting forces. Increasing the cutting speed and feed rate in general deteriorated the surface integrity. High cutting speeds within the range of 200–250 m/min and a low feed rate of 0.1 mm/rev are preferable in order to implement more cost-effective machining without largely reducing the surface quality achieved. The formation of tensile residual stresses on the machined AD 730™, however, could be of a concern where good fatigue resistance is critical.

Place, publisher, year, edition, pages
Springer London, 2019. Vol. 100, no 9-12, p. 2601-2615
Keywords [en]
Nickel-based superalloy, High-speed turning, Cutting forces, Surface integrity, AD730, Cubic boron nitride (CBN) tool
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-153292DOI: 10.1007/s00170-018-2792-1ISI: 000458310400032Scopus ID: 2-s2.0-85055531180OAI: oai:DiVA.org:liu-153292DiVA, id: diva2:1269391
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-03-05Bibliographically approved

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Chen, ZhePeng, Ru LinMoverare, Johan

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