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Article

X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching

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Departamento de Ingeniería, Universidad de Monterrey, Av. Morones Prieto 4500, San Pedro Garza García 66238, Mexico
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Department of Mechanical and Materials Engineering, Portland State University, Portland, OR 97201, USA
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Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Pedro de Alba s/n, San Nicolás de los Garza 66455, Mexico
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Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica, EBBE, Universitat Politecnica de Catalunya, Av. Eduard Maristany 16, 08019 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Materials 2019, 12(7), 1154; https://doi.org/10.3390/ma12071154
Received: 26 March 2019 / Revised: 5 April 2019 / Accepted: 8 April 2019 / Published: 9 April 2019
Automotive components manufacturers use the 5160 steel in leaf and coil springs. The industrial heat treatment process consists in austenitizing followed by the oil quenching and tempering process. Typically, compressive residual stresses are induced by shot peening on the surface of automotive springs to bestow compressive residual stresses that improve the fatigue resistance and increase the service life of the parts after heat treatment. In this work, a high-speed quenching was used to achieve compressive residual stresses on the surface of AISI/SAE 5160 steel samples by producing high thermal gradients and interrupting the cooling in order to generate a case-core microstructure. A special laboratory equipment was designed and built, which uses water as the quenching media in a high-speed water chamber. The severity of the cooling was characterized with embedded thermocouples to obtain the cooling curves at different depths from the surface. Samples were cooled for various times to produce different hardened case depths. The microstructure of specimens was observed with a scanning electron microscope (SEM). X-ray diffraction (XRD) was used to estimate the magnitude of residual stresses on the surface of the specimens. Compressive residual stresses at the surface and sub-surface of about −700 MPa were obtained. View Full-Text
Keywords: residual stresses; X-ray; quenching; steel residual stresses; X-ray; quenching; steel
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MDPI and ACS Style

Lozano, D.E.; Totten, G.E.; Bedolla-Gil, Y.; Guerrero-Mata, M.; Carpio, M.; Martinez-Cazares, G.M. X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching. Materials 2019, 12, 1154. https://doi.org/10.3390/ma12071154

AMA Style

Lozano DE, Totten GE, Bedolla-Gil Y, Guerrero-Mata M, Carpio M, Martinez-Cazares GM. X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching. Materials. 2019; 12(7):1154. https://doi.org/10.3390/ma12071154

Chicago/Turabian Style

Lozano, Diego E., George E. Totten, Yaneth Bedolla-Gil, Martha Guerrero-Mata, Marcel Carpio, and Gabriela M. Martinez-Cazares. 2019. "X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching" Materials 12, no. 7: 1154. https://doi.org/10.3390/ma12071154

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