TY - JOUR
T1 - 炭素の固溶がチタン積層造形合金の結晶組織形成に及ぼす影響
AU - Kariya, Shota
AU - Ichikawa, Eri
AU - Ammarueda, Issariyapat
AU - Umeda, Junko
AU - Chen, Biao
AU - Bahador, Abdolah
AU - Kondoh, Katsuyoshi
N1 - Publisher Copyright:
© 2024 Journal of the Japan Society of Powder and Powder Metallurgy. All rights reserved.
PY - 2024/10
Y1 - 2024/10
N2 - In this study, titanium (Ti) alloy with carbon (C) solid solution was fabricated by laser powder bed fusion (LPBF) from Ti-TiC mixture powder to investigate the effect of C solid solution on microstructure and tensile properties of LPBF Ti alloy. XRD and TEM analysis showed that part of TiC particles was decomposed from the surface during melting process of LPBF and C was solid soluted in α-Ti for Ti-(0.09~0.4 wt%) C. The solid solution of carbon changed the microstructure of the LPBF Ti alloy to fine acicular microstructure due to the martensitic phase transformation. This was also observed in Ti-0.4 wt% C, where solid solution of carbon was not confirmed, suggesting that in Ti-0.4 wt% C, C was once solid solution and precipitated as TiC after phase transformation. LPBF Ti-C alloys showed good strength-ductility, UTS and elongation at break for Ti-0.2 wt% C were 746 MPa and 26.3%, respectively.
AB - In this study, titanium (Ti) alloy with carbon (C) solid solution was fabricated by laser powder bed fusion (LPBF) from Ti-TiC mixture powder to investigate the effect of C solid solution on microstructure and tensile properties of LPBF Ti alloy. XRD and TEM analysis showed that part of TiC particles was decomposed from the surface during melting process of LPBF and C was solid soluted in α-Ti for Ti-(0.09~0.4 wt%) C. The solid solution of carbon changed the microstructure of the LPBF Ti alloy to fine acicular microstructure due to the martensitic phase transformation. This was also observed in Ti-0.4 wt% C, where solid solution of carbon was not confirmed, suggesting that in Ti-0.4 wt% C, C was once solid solution and precipitated as TiC after phase transformation. LPBF Ti-C alloys showed good strength-ductility, UTS and elongation at break for Ti-0.2 wt% C were 746 MPa and 26.3%, respectively.
KW - carbon solid solution
KW - laser powder bed fusion
KW - precipitation
KW - TiC
KW - titanium
UR - http://www.scopus.com/inward/record.url?scp=85207073721&partnerID=8YFLogxK
U2 - 10.2497/jjspm.23-00079
DO - 10.2497/jjspm.23-00079
M3 - 文章
AN - SCOPUS:85207073721
SN - 0532-8799
VL - 71
SP - 517
EP - 523
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
IS - 10
ER -