Title: Preliminary Study on Machining of Additively Manufactured Ti-6Al-4V

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
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  1. Texas A & M University, College Station, TX (United States)
  2. Kansas City National Security Campus (KCNSC), Kansas City, MO (United States)
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We report additively manufactured metals differ from their conventionally produced counterparts due to the inherent material inhomogeneity, porosity, and thermal stress induced by the process. These differences make the machining of additively manufactured metals more difficult and cause premature tool failure or unexpected surface finish at certain conditions. This study takes the first step to investigate and identify the causes of these issues, particularly for Ti-6Al-4V. Printed and wrought samples, as well as heat treatment effect, are compared in a dry cutting condition at a cutting speed of 90 m/min in terms of cutting power, vibration, temperature, and produced surface finish. The results show a lower cutting power and more vibration for as-printed Ti samples, indicating a less ductile microstructure and inclusion of pores. Heat treatment can eliminate these phenomena. There is no significant difference found in the produced surface finish at the current cutting condition.

Research Organization:
Kansas City Nuclear Security Campus (KCNSC), Kansas City, MO (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002839
OSTI ID:
1876552
Report Number(s):
NSC-614-4002; DE-NA0002839
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Journal Name: JOM. Journal of the Minerals, Metals & Materials Society Journal Issue: 3 Vol. 74; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (11)

Additive Manufacturing: Making Imagination the Major Limitation journal March 2014
Titanium alloys and their machinability—a review journal August 1997
Surface integrity of machined additively manufactured Ti alloys journal September 2018
Additive manufacturing of Ti6Al4V alloy: A review journal February 2019
Machining of Additively Manufactured Parts: Implications for Surface Integrity journal January 2016
Investigation on High Speed Turning of Titanium Alloys journal January 2013
Microstructure and Mechanical Properties of Wrought and Additive Manufactured Ti-6Al-4V Cylindrical Bars journal January 2015
Tool-Work Thermocouple Temperature Measurements—Theory and Implementation Issues journal November 1993
Microstructure and mechanical properties of Ti–6Al–4V manufactured by electron beam melting process journal December 2013
The Martensitic Transformation and Mechanical Properties of Ti6Al4V Prepared via Selective Laser Melting journal January 2019
A Review of Heat Treatments on Improving the Quality and Residual Stresses of the Ti–6Al–4V Parts Produced by Additive Manufacturing journal July 2020

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Related Subjects

36 MATERIALS SCIENCE
Ti-6-4
additive manufacturing
machinability
titanium