Reduction of the hot cracking sensitivity of CM-247LC superalloy processed by laser cladding using induction preheating
In the present work, the repair of CM-247LC superalloy has been investigated by using a laser cladding process. Since this material is well known for its high hot-cracking susceptibility in Heat Affected Zone during welding, repairing is quite challenging. In a first stage, a detailed investigation...
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| Veröffentlicht in: | Journal of materials processing technology 2020-03, Vol.277, p.116461, Article 116461 |
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| container_title | Journal of materials processing technology |
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| creator | Bidron, G. Doghri, A. Malot, T. Fournier-dit-Chabert, F. Thomas, M. Peyre, P. |
| description | In the present work, the repair of CM-247LC superalloy has been investigated by using a laser cladding process. Since this material is well known for its high hot-cracking susceptibility in Heat Affected Zone during welding, repairing is quite challenging. In a first stage, a detailed investigation of the effect of cladding parameters on the crack susceptibility was carried out on coupons that received a low pre-heating condition. However, despite a reduction of crack sensitivity for low energy inputs, this material has systematically shown some evidence of cracking in the HAZ. In a second stage, attempts were made to reduce crack defects by using an induction preheating, with higher temperatures in the range of 800–1100 °C. With the highest pre-heating temperatures near 1100 °C, the partial dissolution of large γ’ precipitates, combined with re-precipitation of secondary and smaller γ' precipitates were helpful to prevent hot cracking. |
| doi_str_mv | 10.1016/j.jmatprotec.2019.116461 |
| format | Article |
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Since this material is well known for its high hot-cracking susceptibility in Heat Affected Zone during welding, repairing is quite challenging. In a first stage, a detailed investigation of the effect of cladding parameters on the crack susceptibility was carried out on coupons that received a low pre-heating condition. However, despite a reduction of crack sensitivity for low energy inputs, this material has systematically shown some evidence of cracking in the HAZ. In a second stage, attempts were made to reduce crack defects by using an induction preheating, with higher temperatures in the range of 800–1100 °C. 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| source | Elsevier ScienceDirect Journals |
| subjects | Chemical precipitation Cladding CM-247LC Crack sensitivity Engineering Sciences Heat affected zone Heating Laser Laser beam cladding Laser beam welding Maintenance Materials Precipitates Preheating Reduction Superalloys |
| title | Reduction of the hot cracking sensitivity of CM-247LC superalloy processed by laser cladding using induction preheating |
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