Lock-in Thermography for Surface Treatment Characterization in Gears
Mechanical gears are essential in power transmission systems across various industrial applications. Their performance is critically influenced by residual stresses from manufacturing processes like induction hardening, case hardening, and shot peening. Surface compressive residual stresses enhance...
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| Language: | English |
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MDPI AG
2025-02-01
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| Series: | Engineering Proceedings |
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| Online Access: | https://www.mdpi.com/2673-4591/85/1/2 |
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| author | Francesca Maria Curà Luca Corsaro Ludovica Tromba |
| author_facet | Francesca Maria Curà Luca Corsaro Ludovica Tromba |
| author_sort | Francesca Maria Curà |
| collection | DOAJ |
| description | Mechanical gears are essential in power transmission systems across various industrial applications. Their performance is critically influenced by residual stresses from manufacturing processes like induction hardening, case hardening, and shot peening. Surface compressive residual stresses enhance resistance to pitting fatigue, bending fatigue and crack propagation, improving overall hardness. In the present work, a Non-Destructive Thermographic method (Active thermography), based on measurement of the thermal diffusivity parameter, is presented to characterize the surface treatments applied to gears. Surface hardness was measured using a micro-hardness tester, and residual stresses were determined with an X-Ray diffractometer, showing variations due to surface treatments. The variation in the thermal diffusivity parameter, obtained using the Slope Method, was found to be an indicator of the surface treatments’ effectiveness. |
| format | Article |
| id | doaj-art-0500f4829c754ab09fbc198454ea133d |
| institution | OA Journals |
| issn | 2673-4591 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Engineering Proceedings |
| spelling | doaj-art-0500f4829c754ab09fbc198454ea133d2025-08-20T02:24:34ZengMDPI AGEngineering Proceedings2673-45912025-02-01851210.3390/engproc2025085002Lock-in Thermography for Surface Treatment Characterization in GearsFrancesca Maria Curà0Luca Corsaro1Ludovica Tromba2DIMEAS, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyDIMEAS, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyDIMEAS, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyMechanical gears are essential in power transmission systems across various industrial applications. Their performance is critically influenced by residual stresses from manufacturing processes like induction hardening, case hardening, and shot peening. Surface compressive residual stresses enhance resistance to pitting fatigue, bending fatigue and crack propagation, improving overall hardness. In the present work, a Non-Destructive Thermographic method (Active thermography), based on measurement of the thermal diffusivity parameter, is presented to characterize the surface treatments applied to gears. Surface hardness was measured using a micro-hardness tester, and residual stresses were determined with an X-Ray diffractometer, showing variations due to surface treatments. The variation in the thermal diffusivity parameter, obtained using the Slope Method, was found to be an indicator of the surface treatments’ effectiveness.https://www.mdpi.com/2673-4591/85/1/2active thermographylock-in thermographyresidual stressesgearssurface treatment |
| spellingShingle | Francesca Maria Curà Luca Corsaro Ludovica Tromba Lock-in Thermography for Surface Treatment Characterization in Gears Engineering Proceedings active thermography lock-in thermography residual stresses gears surface treatment |
| title | Lock-in Thermography for Surface Treatment Characterization in Gears |
| title_full | Lock-in Thermography for Surface Treatment Characterization in Gears |
| title_fullStr | Lock-in Thermography for Surface Treatment Characterization in Gears |
| title_full_unstemmed | Lock-in Thermography for Surface Treatment Characterization in Gears |
| title_short | Lock-in Thermography for Surface Treatment Characterization in Gears |
| title_sort | lock in thermography for surface treatment characterization in gears |
| topic | active thermography lock-in thermography residual stresses gears surface treatment |
| url | https://www.mdpi.com/2673-4591/85/1/2 |
| work_keys_str_mv | AT francescamariacura lockinthermographyforsurfacetreatmentcharacterizationingears AT lucacorsaro lockinthermographyforsurfacetreatmentcharacterizationingears AT ludovicatromba lockinthermographyforsurfacetreatmentcharacterizationingears |