PSI - Issue 33

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 33 (2021) 1152–1161

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo The wear mechanism of the different tested conditions was investigated by means of Scanning Electron Microscope analyses on the sample worn surfaces, and the results were related to the friction coefficient and to the wear rate. The ability of laser-cladding to reduce the consumption of disk brake materials was stated. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access art cle under the CC BY-NC-ND lic nse (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: Laser-cladding; Gray Cast Iron; Wear; Disc Brake. In this research, two laser-cladding coatings were proposed to increase the wear performances of cast iron discs brake. The wear resistance was evaluated through pin-on-disc and block-on-ring laboratory tests. Commercial pads material was used as counterpart in the tribological system. Conventional grey cast iron samples were used as reference material. During the tests, the coefficient of friction with the sliding distance was continuously recorded and the wear rate for both disc and pad materials was calculated at the end of each tests. The wear mechanism of the different tested conditions was investigated by means of Scanning Electron Microscope analyses on the sample worn surfaces, and the results were related to the friction coefficient and to the wear rate. The ability of laser-cladding to reduce the consumption of disk brake materials was stated. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo K ywords: Laser-cladding; Gray Cast Iron; Wea ; Disc Brake. Abstract Lamellar grey cast iron (type A) with a pearlitic matrix has excellent vibration damping properties, good thermal capacity and conductivity, good castability and machinability. Such properties, together with the low cost, make this material the most used in the European market for the production of cars discs brake. Recent studies have demonstrated that a part of the total non-exhaust emission produced by a car derives directly from braking systems. During their use, wear debris in the form of solid airborne particles are created from both disc and friction pads wear. Reducing these emissions by increasing the wear resistance of braking systems would therefore contribute to both decreasing pollution and increasing brake disks life. In this research, two laser-cladding coatings were proposed to increase the wear performances of cast iron discs brake. The wear resistance was evaluated through pin-on-disc and block-on-ring laboratory tests. Commercial pads material was used as counterpart in the tribological system. Conventional grey cast iron samples were used as reference material. During the tests, the coefficient of friction with the sliding distance was continuously recorded and the wear rate for both disc and pad materials was calculated at the end of each tests. Abstract Lamellar grey cast iron (type A) with a pearlitic matrix has excellent vibration damping properties, good thermal capacity and conductivity, good castability and machinability. Such properties, together with the low cost, make this material the most used in the European market for the production of cars discs brake. Recent studies have demonstrated that a part of the total non-exhaust emission produced by a car derives directly from braking systems. During their use, wear debris in the form of solid airborne particles are created from both disc and friction pads wear. Reducing these emissions by increasing the wear resistance of braking systems would therefore contribute to both decreasing pollution and increasing brake disks life. IGF26 - 26th International Conference on Fracture and Structural Integrity The effect of laser-cladding on the wear behavior of gray cast iron brake disc Pietro Tonolini a1 , Lorenzo Montesano a , Annalisa Pola a , Ettore Landriani b , Marcello Gelfi a IGF26 - 26th International Conference on Fracture and Structural Integrity The effect of laser-cladding on the wear behavior of gray cast iron brake disc Pietro Tonolini a1 , Lorenzo Montesano a , Annalisa Pola a , Ettore Landriani b , Marcello Gelfi a a University of Brescia, Department of Mechanical and Industrial Engineering, via Branze 38, 25124 Brescia, Italy b InterCar S.p.A., via Bonfardina 2/4, 25046 Cazzago S. Martino (Bs), Italy a University of Brescia, Department of Mechanical and Industrial Engineering, via Branze 38, 25124 Brescia, Italy b InterCar S.p.A., via Bonfardina 2/4, 25046 Cazzago S. Martino (Bs), Italy

1 * Corresponding author. Tel.: +39-0303715826; fax: +39-0303702448. E-mail address: p.tonolini002@unibs.it 1 * Corresponding author. Tel.: +39-0303715826; fax: +39-0303702448. E-mail address: p.tonolini002@unibs.it

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statem nt: Peer-revi w under responsibility of th scientifi committee of the IGF ExCo

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.129