Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition
This study focused on the mechanical and metallurgical characteristics of high-wear-resistance steel (HWS) deposited using directed energy deposition (DED) for metal substrate hardfacing or repairing. As post-deposition heat treatment changes the metallurgical characteristics of deposits, the effect...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/9/3/282 |
| _version_ | 1818550525377904640 |
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| author | Gyeong Yun Baek Gwang Yong Shin Ki Yong Lee Do Sik Shim |
| author_facet | Gyeong Yun Baek Gwang Yong Shin Ki Yong Lee Do Sik Shim |
| author_sort | Gyeong Yun Baek |
| collection | DOAJ |
| description | This study focused on the mechanical and metallurgical characteristics of high-wear-resistance steel (HWS) deposited using directed energy deposition (DED) for metal substrate hardfacing or repairing. As post-deposition heat treatment changes the metallurgical characteristics of deposits, the effect of post-deposition heat treatment on the mechanical properties was investigated via microstructure observation and by conducting hardness, wear, and impact tests. The obtained micro-images showed that the deposited HWS layers exhibit cellular and columnar dendrites, and the microstructure of heat-treated HWS (HT-HWS) transformed its phase during quenching and tempering. The hardness and wear resistance of the HT-HWS deposits were higher than those of the HWS deposited specimen, whereas the latter exhibited a higher fracture toughness. The matrix microstructure and carbide characteristics, which are characterized by the chemical composition of the materials, significantly influenced the mechanical properties. |
| first_indexed | 2024-12-12T08:47:37Z |
| format | Article |
| id | doaj.art-5ff19ddb650c48b18550ae9a353f44e0 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-12T08:47:37Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-5ff19ddb650c48b18550ae9a353f44e02022-12-22T00:30:25ZengMDPI AGMetals2075-47012019-03-019328210.3390/met9030282met9030282Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy DepositionGyeong Yun Baek0Gwang Yong Shin1Ki Yong Lee2Do Sik Shim3Department of Mechanical Engineering, Chonnam National Univ., 77 Yongbong-ro, Buk-gu, Gwangju 500-757, South KoreaSmart Manufacturing Process Technology Center, KITECH, Wolchul-dong, Buk-gu, Gwangju 500-460, South KoreaSmart Manufacturing Process Technology Center, KITECH, Wolchul-dong, Buk-gu, Gwangju 500-460, South KoreaDivision of Mechanical Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-Gu, Busan 49112, South KoreaThis study focused on the mechanical and metallurgical characteristics of high-wear-resistance steel (HWS) deposited using directed energy deposition (DED) for metal substrate hardfacing or repairing. As post-deposition heat treatment changes the metallurgical characteristics of deposits, the effect of post-deposition heat treatment on the mechanical properties was investigated via microstructure observation and by conducting hardness, wear, and impact tests. The obtained micro-images showed that the deposited HWS layers exhibit cellular and columnar dendrites, and the microstructure of heat-treated HWS (HT-HWS) transformed its phase during quenching and tempering. The hardness and wear resistance of the HT-HWS deposits were higher than those of the HWS deposited specimen, whereas the latter exhibited a higher fracture toughness. The matrix microstructure and carbide characteristics, which are characterized by the chemical composition of the materials, significantly influenced the mechanical properties.http://www.mdpi.com/2075-4701/9/3/282laser depositiontool steelhardnessweartoughness |
| spellingShingle | Gyeong Yun Baek Gwang Yong Shin Ki Yong Lee Do Sik Shim Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition Metals laser deposition tool steel hardness wear toughness |
| title | Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition |
| title_full | Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition |
| title_fullStr | Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition |
| title_full_unstemmed | Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition |
| title_short | Mechanical Properties of Tool Steels with High Wear Resistance via Directed Energy Deposition |
| title_sort | mechanical properties of tool steels with high wear resistance via directed energy deposition |
| topic | laser deposition tool steel hardness wear toughness |
| url | http://www.mdpi.com/2075-4701/9/3/282 |
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