Surface integrity in micro-grinding of Ti6Al4V considering the specific micro-grinding energy
Paper in proceedings, 2020

Surface integrity is one of the most significant quality aspects of micro-grinding of difficult-to-cut materials. On the other hand, specific grinding energy is a fundamental parameter for describing the micro-grinding process. This paper addresses the surface integrity of the micro-ground surface of a titanium alloy under different cutting speeds and feed-rate-to-depth-of-cut (vw/ae) ratios at the same chip thickness. Three different cutting speeds and vw/ae ratios have been chosen and the residual stress of the workpiece, as well as the specific micro-grinding energy, have been investigated. The results showed that almost the same minimum specific grinding energy was obtained at tested cutting speed and vw/aeratio. The results of the XRD analysis showed that contrary to the specific micro-grinding energy, the residual stresses of the ground surface changed by varying the cutting speed and vw/ae ratio. Higher cutting speeds resulted in lower compressive residual stress, and higher vw/ae ratios resulted in higher compressive stresses. This can be attributed to higher temperatures in the chip-formation process compared to the plastic deformation in micro-grinding at higher cutting speeds and lower vw/ae ratios which was proved via SEM micrographs.

Grinding

Surface Integrity

Titanium alloy

Micro-grinding

Author

Mohammadali Kadivar

Chalmers, Industrial and Materials Science, Materials and manufacture

Bahman Azarhoushang

Furtwangen University (HFU)

Amir Daneshi

Furtwangen University (HFU)

Peter Krajnik

Chalmers, Industrial and Materials Science, Materials and manufacture

Procedia CIRP

22128271 (ISSN)

Vol. 87 13-18

5th CIRP Conference on Surface Integrity, CSI 2020
, ,

Areas of Advance

Production

Subject Categories

Manufacturing, Surface and Joining Technology

DOI

10.1016/j.procir.2020.02.069

More information

Latest update

1/4/2021 8