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A Study on Drilling Machinability of γ-TiAl Alloy

Hyunseok Yang Woo-Chul Jung Man-Sik Kong Changhee Lee
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 4 | 951-954 | DOI: 10.24425/amm.2021.136403
Keywords γ-TiAl alloy drilling Machinability Thrust Torque
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Abstract

Intermetallic γ-TiAl alloy has excellent properties at high temperatures and is thus attracting attention as a substitute for nickel-based superalloy parts for turbine engines. However, γ-TiAl alloy is reported to be a difficult material to be machined due to its low ductility at room temperature, tensile strength, and thermal conductivity. In this study, a system capable of measuring thrust force (Tf) and torque (Tc) during the drilling process was constructed, and drilling processability according to the heat treated microstructure of γ-TiAl alloy was compared. As a result, it was confirmed that the thrust and torque of the γ-TiAl alloy having a microstructure in which the grains were refined by the heat treatment process was relatively low and rapidly stabilized, which is advantageous for drilling.
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Bibliography

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Authors and Affiliations

Hyunseok Yang
1 2
ORCID: ORCID
Woo-Chul Jung
1
ORCID: ORCID
Man-Sik Kong
1
ORCID: ORCID
Changhee Lee
2
  1. Advanced Materials & Processing Center, Institute for Advanced Engineering, Yongin, South Korea
  2. Hanyang University, Division of Materials Science and Engineering, Seoul, South Korea

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