Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity
Additive manufacturing (AM) is a proven time- and cost-effective method for repairing parts locally damaged after e.g. repetitive friction wear or corrosion. Repairing a hardfacing coating using AM technologies presents however several simultaneous challenges arising from the complex geometry and a...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
|
| Series: | Journal of Advanced Joining Processes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666330925000056 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832586192684580864 |
|---|---|
| author | Wilfried Pacquentin Pierre Wident Jérôme Varlet Thomas Cailloux Hicham Maskrot |
| author_facet | Wilfried Pacquentin Pierre Wident Jérôme Varlet Thomas Cailloux Hicham Maskrot |
| author_sort | Wilfried Pacquentin |
| collection | DOAJ |
| description | Additive manufacturing (AM) is a proven time- and cost-effective method for repairing parts locally damaged after e.g. repetitive friction wear or corrosion. Repairing a hardfacing coating using AM technologies presents however several simultaneous challenges arising from the complex geometry and a high probability of crack formation due to process-induced stress. We address the repair of a cobalt-based Stellite™ 6 hardfacing coating on an AISI 316L substrate performed using Laser Powder Directed Energy Deposition (LP-DED) and investigate the influence of key process features and parameters. We describe our process which successfully prevents crack formation both during and after the repair, highlighting the design of the preliminary part machining phase, induction heating of an extended part volume during the laser repair phase and the optimal scanning strategy. Local characterization using non-destructive testing, Vickers hardness measurements and microstructural examinations by scanning electron microscopy (SEM) show an excellent metallurgical quality of the repair and its interface with the original part. In addition, we introduce an innovative process qualification test assessing the repair quality and innocuity, which is based on the global response to induced cracks and probes the absence of crack attraction by the repair (ACAR11 ACAR stands for absence of crack attraction by the repair.). Here this ACAR test reveals a slight difference in mechanical behavior between the repair and the original coating which motivates further work to eventually make the repair imperceptible. |
| format | Article |
| id | doaj-art-4b0548cd19114711ade571c5e42e84b6 |
| institution | Kabale University |
| issn | 2666-3309 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Advanced Joining Processes |
| spelling | doaj-art-4b0548cd19114711ade571c5e42e84b62025-01-26T05:04:58ZengElsevierJournal of Advanced Joining Processes2666-33092025-06-0111100284Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuityWilfried Pacquentin0Pierre Wident1Jérôme Varlet2Thomas Cailloux3Hicham Maskrot4Université Paris-Saclay, CEA, Service de Physico-Chimie, 91191, Gif sur Yvette, France; Corresponding author.Université Paris-Saclay, CEA, Service de Recherches en Matériaux et Procédés Avancés, 91191, Gif sur Yvette, FranceUniversité Paris-Saclay, CEA, Service de Recherches en Matériaux et Procédés Avancés, 91191, Gif sur Yvette, FranceUniversité Paris-Saclay, CEA, Service de Recherches en Matériaux et Procédés Avancés, 91191, Gif sur Yvette, FranceUniversité Paris-Saclay, CEA, Service de Recherches en Matériaux et Procédés Avancés, 91191, Gif sur Yvette, FranceAdditive manufacturing (AM) is a proven time- and cost-effective method for repairing parts locally damaged after e.g. repetitive friction wear or corrosion. Repairing a hardfacing coating using AM technologies presents however several simultaneous challenges arising from the complex geometry and a high probability of crack formation due to process-induced stress. We address the repair of a cobalt-based Stellite™ 6 hardfacing coating on an AISI 316L substrate performed using Laser Powder Directed Energy Deposition (LP-DED) and investigate the influence of key process features and parameters. We describe our process which successfully prevents crack formation both during and after the repair, highlighting the design of the preliminary part machining phase, induction heating of an extended part volume during the laser repair phase and the optimal scanning strategy. Local characterization using non-destructive testing, Vickers hardness measurements and microstructural examinations by scanning electron microscopy (SEM) show an excellent metallurgical quality of the repair and its interface with the original part. In addition, we introduce an innovative process qualification test assessing the repair quality and innocuity, which is based on the global response to induced cracks and probes the absence of crack attraction by the repair (ACAR11 ACAR stands for absence of crack attraction by the repair.). Here this ACAR test reveals a slight difference in mechanical behavior between the repair and the original coating which motivates further work to eventually make the repair imperceptible.http://www.sciencedirect.com/science/article/pii/S2666330925000056Additive manufacturingDirect laser depositionHardfacing coatingRepairRepair innocuity assessmentMechanical characterization |
| spellingShingle | Wilfried Pacquentin Pierre Wident Jérôme Varlet Thomas Cailloux Hicham Maskrot Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity Journal of Advanced Joining Processes Additive manufacturing Direct laser deposition Hardfacing coating Repair Repair innocuity assessment Mechanical characterization |
| title | Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| title_full | Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| title_fullStr | Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| title_full_unstemmed | Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| title_short | Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| title_sort | temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity |
| topic | Additive manufacturing Direct laser deposition Hardfacing coating Repair Repair innocuity assessment Mechanical characterization |
| url | http://www.sciencedirect.com/science/article/pii/S2666330925000056 |
| work_keys_str_mv | AT wilfriedpacquentin temperatureinfluenceontherepairofahardfacingcoatingusinglasermetaldepositionandassessmentoftherepairinnocuity AT pierrewident temperatureinfluenceontherepairofahardfacingcoatingusinglasermetaldepositionandassessmentoftherepairinnocuity AT jeromevarlet temperatureinfluenceontherepairofahardfacingcoatingusinglasermetaldepositionandassessmentoftherepairinnocuity AT thomascailloux temperatureinfluenceontherepairofahardfacingcoatingusinglasermetaldepositionandassessmentoftherepairinnocuity AT hichammaskrot temperatureinfluenceontherepairofahardfacingcoatingusinglasermetaldepositionandassessmentoftherepairinnocuity |