Vibration absorption of as-built and post-heat-treated Ti-6Al-4V alloy fabricated by laser powder bed fusion additive manufacturing

Masaaki NAKAI; Kohei NAGAYA; Kosuke UEKI; Hideki KYOGOKU

doi:10.55713/jmmm.v34i3.1963

Authors

Masaaki NAKAI Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
Kohei NAGAYA Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
Kosuke UEKI Graduate School of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
Hideki KYOGOKU Fundamental Technology for Next Generation Research Institute, Kindai University, 1 Takaya Umenobe, Higashihiroshima, Hiroshima 739-2116, Japan

DOI:

https://doi.org/10.55713/jmmm.v34i3.1963

Keywords:

Additive manufacturing, Ti-6Al-4V, Vibration absorption, Anisotropy, Post-heat treatment

Abstract

Vibration absorption of the Ti-6Al-4V alloy fabricated by laser powder bed fusion additive manufacturing (LPBF-AM) was evaluated following as-built and post-heat treatment (i.e., solution treatment followed by water quenching). The base plate was heated at 50°C or 200°C during building. Results showed that the vibration absorption of the as-built Ti-6Al-4V alloy was higher when the base plate was heated at 50°C than at 200°C. Further, the vibration absorption indicated strong anisotropy, with the highest vibration absorption in the direction perpendicular to the building direction and transverse to the laser scanning direction. However, after solution treatment followed by water quenching, the anisotropy in the vibration absorption of the LPBF-AMed Ti-6Al-4V alloy practically disappeared, and relatively high values were obtained parallel to each direction.

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