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Superabrasive Grinding Characteristics of Additively Manufactured Ti-6Al-4V

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Abstract

Extensive research on additive manufacturing (AM) has revealed its potential as well as its limitations. The components produced by AM usually do not meet the standard for direct end-use due to poor dimensional tolerance and surface finish. Therefore, subtractive manufacturing (SM) like machining and grinding are required to finish AM parts. The layer-by-layer deposition of the AM process yields components with high anisotropic properties and residual stress. Consequently, the SM characteristics of AM samples are reported to be very different from conventionally produced components. It necessitates significant research work on the SM characteristics of AM produced parts. The present study reports grinding of additively manufactured selective laser melted (SLM) Ti-6Al-4V and compares the grinding characteristics with rolled Ti-6Al-4V. The SLM samples were heat-treated before grinding to eliminate the effect of above-mentioned AM induced characteristics. The microstructure of the SLM samples did not reveal any sign of layered deposition owing to the heat treatment process. The samples were also found to be free from SLM-induced residual stress. Consequently, the differences observed in the grinding characteristics of SLM and rolled samples are not very substantial. The noticed differences in force, surface roughness, and residual stress can be attributed to their different hardness. Hence, the results of the present work suggest carrying out a proper heat treatment to the SLM-produced components before grinding so that the anomalous grinding behaviour can be avoided.

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Authors and Affiliations

  1. Machine Tool and Machining Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721 302, India

    Rakesh Kandulna, Anirban Naskar & S. Paul

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  1. Rakesh Kandulna
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  2. Anirban Naskar
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  3. S. Paul
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Correspondence to S. Paul.

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Kandulna, R., Naskar, A. & Paul, S. Superabrasive Grinding Characteristics of Additively Manufactured Ti-6Al-4V. Trans Indian Natl. Acad. Eng. 7, 197–205 (2022). https://doi.org/10.1007/s41403-021-00259-2

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