Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy
This study investigated the effects of the hot isostatic pressing process on the crack healing, microstructure, and mechanical properties of the laser repair-welded CM247LC precipitation-hardened superalloy. To ensure the strength of the repair-welded area, this study used the direct re-melting appr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-10-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/6/10/238 |
| _version_ | 1828367773068165120 |
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| author | Keng-Tu Hsu Huei-Sen Wang Hou-Guang Chen Po-Chun Chen |
| author_facet | Keng-Tu Hsu Huei-Sen Wang Hou-Guang Chen Po-Chun Chen |
| author_sort | Keng-Tu Hsu |
| collection | DOAJ |
| description | This study investigated the effects of the hot isostatic pressing process on the crack healing, microstructure, and mechanical properties of the laser repair-welded CM247LC precipitation-hardened superalloy. To ensure the strength of the repair-welded area, this study used the direct re-melting approach, and simulated the repair welding with the filler addition, which has a chemical composition matching that of the base superalloy. As expected, different types of cracks, including the solidification crack in the weld fusion zone and various types of liquidation cracks in the heat-affected zone, were observed. Through a proper hot isostatic pressing healing process, all cracks in the weld fusion zone and the heat-affected zone of the repair-welded pieces were healed. At the same time, some nano- and micro-sized carbides tended to form discontinuously along the healed crack trace. A micro-hardness test was conducted in the repair-welded area, and the results were similar to that of the as-cast material. |
| first_indexed | 2024-04-14T06:02:35Z |
| format | Article |
| id | doaj.art-76f0a8f62e45437db6a5bb94f2411bb4 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-04-14T06:02:35Z |
| publishDate | 2016-10-01 |
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| series | Metals |
| spelling | doaj.art-76f0a8f62e45437db6a5bb94f2411bb42022-12-22T02:08:41ZengMDPI AGMetals2075-47012016-10-0161023810.3390/met6100238met6100238Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC SuperalloyKeng-Tu Hsu0Huei-Sen Wang1Hou-Guang Chen2Po-Chun Chen3Department of Materials Science and Engineering, I-Shou University, Kaohsiung 84001, TaiwanDepartment of Materials Science and Engineering, I-Shou University, Kaohsiung 84001, TaiwanDepartment of Materials Science and Engineering, I-Shou University, Kaohsiung 84001, TaiwanDepartment of Materials Science and Engineering, I-Shou University, Kaohsiung 84001, TaiwanThis study investigated the effects of the hot isostatic pressing process on the crack healing, microstructure, and mechanical properties of the laser repair-welded CM247LC precipitation-hardened superalloy. To ensure the strength of the repair-welded area, this study used the direct re-melting approach, and simulated the repair welding with the filler addition, which has a chemical composition matching that of the base superalloy. As expected, different types of cracks, including the solidification crack in the weld fusion zone and various types of liquidation cracks in the heat-affected zone, were observed. Through a proper hot isostatic pressing healing process, all cracks in the weld fusion zone and the heat-affected zone of the repair-welded pieces were healed. At the same time, some nano- and micro-sized carbides tended to form discontinuously along the healed crack trace. A micro-hardness test was conducted in the repair-welded area, and the results were similar to that of the as-cast material.http://www.mdpi.com/2075-4701/6/10/238laser repair weldedhot isostatic pressingnickel base superalloy |
| spellingShingle | Keng-Tu Hsu Huei-Sen Wang Hou-Guang Chen Po-Chun Chen Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy Metals laser repair welded hot isostatic pressing nickel base superalloy |
| title | Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy |
| title_full | Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy |
| title_fullStr | Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy |
| title_full_unstemmed | Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy |
| title_short | Effects of the Hot Isostatic Pressing Process on Crack Healing of the Laser Repair-Welded CM247LC Superalloy |
| title_sort | effects of the hot isostatic pressing process on crack healing of the laser repair welded cm247lc superalloy |
| topic | laser repair welded hot isostatic pressing nickel base superalloy |
| url | http://www.mdpi.com/2075-4701/6/10/238 |
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