TY - JOUR
T1 - Microstructure and tensile fracture behavior of three-stage heat treated inconel 718 alloy produced via laser powder bed fusion process
AU - Zhao, Jun Ren
AU - Hung, Fei Yi
AU - Lui, Truan Sheng
N1 - Funding Information:
The authors are grateful to the Instrument Center of NationalCheng Kung University and the Ministry of Science andTechnology of Taiwan (Grant No. MOST 107-2221-E-006-012-MY2) for their financial support of thisresearch.
Funding Information:
The authors are grateful to the I nstrument Center of National Cheng Kung University and the Ministry of Science and Technology of Taiwan (Grant No. MOST 1 07-2221-E-006-012-MY2) for their financial support of this research.
Publisher Copyright:
© 2020 The Authors.
PY - 2020
Y1 - 2020
N2 - In this study, Laser Powder Bed Fusion (LPBF) Inconel 718 is subjected to various heattreatments, namely double aging, solid solution + double aging, and homogenization +solid-solution + double aging, to investigate the effect of heat treatment on room- and high-temperature tensile properties. The results show that all three heat treatments increasehardness and room-temperature tensile strength, but greatly reduce ductility. With anincrease in tensile test temperature, the stress-induced Portevin-Le Chatelier (PLC) effectcan effectively prevent the occurrence of oxidation at grain boundaries and maintain a cer-tain ductility in the range of room temperature to 600°C. However, when the temperatureis 650°C, the PLC effect disappears, resulting in a high-temperature embrittlement effect.
AB - In this study, Laser Powder Bed Fusion (LPBF) Inconel 718 is subjected to various heattreatments, namely double aging, solid solution + double aging, and homogenization +solid-solution + double aging, to investigate the effect of heat treatment on room- and high-temperature tensile properties. The results show that all three heat treatments increasehardness and room-temperature tensile strength, but greatly reduce ductility. With anincrease in tensile test temperature, the stress-induced Portevin-Le Chatelier (PLC) effectcan effectively prevent the occurrence of oxidation at grain boundaries and maintain a cer-tain ductility in the range of room temperature to 600°C. However, when the temperatureis 650°C, the PLC effect disappears, resulting in a high-temperature embrittlement effect.
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U2 - 10.1016/j.jmrt.2020.01.030
DO - 10.1016/j.jmrt.2020.01.030
M3 - Article
AN - SCOPUS:85084154234
SN - 2238-7854
VL - 9
SP - 3357
EP - 3367
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
IS - 3
ER -