Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion
This study reports an anomalous temperature-dependent tensile behavior of laser-beam powder bed fusion (PBF-LB) processed Cu–Cr–Zr alloy. The yield strength of the alloy initially decreases as the temperature increases to 200±5 MPa and then increases to 350±11 MPa at 500°C before reducing to 234±6 M...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Additive Manufacturing Letters |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772369024000446 |
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| author | Dasom Kim Naoki Takata Junji Umeda Toshihiko Shimizu Makoto Kobashi |
| author_facet | Dasom Kim Naoki Takata Junji Umeda Toshihiko Shimizu Makoto Kobashi |
| author_sort | Dasom Kim |
| collection | DOAJ |
| description | This study reports an anomalous temperature-dependent tensile behavior of laser-beam powder bed fusion (PBF-LB) processed Cu–Cr–Zr alloy. The yield strength of the alloy initially decreases as the temperature increases to 200±5 MPa and then increases to 350±11 MPa at 500°C before reducing to 234±6 MPa at 600°C. The microstructure consists of elongated Cu grains with a high concentration of Cr solute (∼1 mass%), resulting from rapid solidification during the PBF-LB process. Transmission electron microscopy for the specimens deformed at 500°C revealed the presence of numerous nanoscale Cr-rich particles embedded inside the supersaturated solid solution of the Cu matrix. Nanoscale particles can act as barriers to dislocation motion, leading to an increase in internal stress during plastic deformation at elevated temperatures. This work provides the high potential of post heat treatments for achieving superior mechanical performance using high solute supersaturation formed by the PBF-LB process. |
| format | Article |
| id | doaj-art-ad0b721630cf4d8ab8e5ff4cda09dc0a |
| institution | OA Journals |
| issn | 2772-3690 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Additive Manufacturing Letters |
| spelling | doaj-art-ad0b721630cf4d8ab8e5ff4cda09dc0a2025-08-20T02:34:19ZengElsevierAdditive Manufacturing Letters2772-36902024-12-011110023610.1016/j.addlet.2024.100236Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusionDasom Kim0Naoki Takata1Junji Umeda2Toshihiko Shimizu3Makoto Kobashi4Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 JapanDepartment of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 Japan; Corresponding author.Aichi Center for Industry and Science Technology, 1267-1 Akiai, Yakusa-cho, Toyota 470-0356 JapanTKE Co. Ltd., 3-13-2 Kusunoki, Yatomi, 498-0066 JapanDepartment of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 JapanThis study reports an anomalous temperature-dependent tensile behavior of laser-beam powder bed fusion (PBF-LB) processed Cu–Cr–Zr alloy. The yield strength of the alloy initially decreases as the temperature increases to 200±5 MPa and then increases to 350±11 MPa at 500°C before reducing to 234±6 MPa at 600°C. The microstructure consists of elongated Cu grains with a high concentration of Cr solute (∼1 mass%), resulting from rapid solidification during the PBF-LB process. Transmission electron microscopy for the specimens deformed at 500°C revealed the presence of numerous nanoscale Cr-rich particles embedded inside the supersaturated solid solution of the Cu matrix. Nanoscale particles can act as barriers to dislocation motion, leading to an increase in internal stress during plastic deformation at elevated temperatures. This work provides the high potential of post heat treatments for achieving superior mechanical performance using high solute supersaturation formed by the PBF-LB process.http://www.sciencedirect.com/science/article/pii/S2772369024000446Powder bed fusionCu–Cr–Zr alloyMicrostructurePrecipitationHigh-temperature strength |
| spellingShingle | Dasom Kim Naoki Takata Junji Umeda Toshihiko Shimizu Makoto Kobashi Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion Additive Manufacturing Letters Powder bed fusion Cu–Cr–Zr alloy Microstructure Precipitation High-temperature strength |
| title | Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion |
| title_full | Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion |
| title_fullStr | Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion |
| title_full_unstemmed | Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion |
| title_short | Anomalous temperature-dependent strength of copper alloy manufactured by laser-beam powder bed fusion |
| title_sort | anomalous temperature dependent strength of copper alloy manufactured by laser beam powder bed fusion |
| topic | Powder bed fusion Cu–Cr–Zr alloy Microstructure Precipitation High-temperature strength |
| url | http://www.sciencedirect.com/science/article/pii/S2772369024000446 |
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