The potential of applying thermodynamics to study the tribological response of a tribological system is addressed in this paper. In order to do so, a model was developed to obtain the entropy flow generated by three different dissipative processes present in dry sliding, namely, thermal gradient, heat conduction, and abrasion. The flash and bulk temperatures at the contact interface were obtained with the aid of the finite element method (FEM), and pin-on-disk tests were performed by using titanium alloy (Ti6Al4V) disks and tungsten carbide (WC/10Co) pins. Then, the wear rate obtained from the tribological tests was correlated with the calculated entropy flow, and a degradation coefficient was associated to the sliding process. A linear dependence of the wear rate and the degradation coefficient was observed regardless of the variation of the points of operation of the system, so it is proposed that the coefficient of degradation used is inherent to the tribological system.
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November 2017
Research-Article
Wear Rate and Entropy Generation Sources in a Ti6Al4V–WC/10Co Sliding Pair
J. S. Rudas,
J. S. Rudas
Tribology and Surfaces Group,
Universidad Nacional de Colombia,
Medellin 050041, Colombia;
Universidad Nacional de Colombia,
Medellin 050041, Colombia;
Energy Research and Innovation Group,
Institución Universitaria Pascual Bravo,
Medellin 050034, Colombia
e-mail: jsrudas@unal.edu.co
Institución Universitaria Pascual Bravo,
Medellin 050034, Colombia
e-mail: jsrudas@unal.edu.co
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L. M. Gómez,
L. M. Gómez
Research Group in Dynamic Processes,
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: limage@unal.edu.co
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: limage@unal.edu.co
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A. Toro,
A. Toro
Tribology and Surfaces Group,
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: aotoro@unal.edu.co
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: aotoro@unal.edu.co
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J. M. Gutiérrez,
J. M. Gutiérrez
Material Composite Group,
University of Cádiz,
Algeciras 11202, Spain
e-mail: josemaria.gutierrez@uca.es
University of Cádiz,
Algeciras 11202, Spain
e-mail: josemaria.gutierrez@uca.es
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A. Corz
A. Corz
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J. S. Rudas
Tribology and Surfaces Group,
Universidad Nacional de Colombia,
Medellin 050041, Colombia;
Universidad Nacional de Colombia,
Medellin 050041, Colombia;
Energy Research and Innovation Group,
Institución Universitaria Pascual Bravo,
Medellin 050034, Colombia
e-mail: jsrudas@unal.edu.co
Institución Universitaria Pascual Bravo,
Medellin 050034, Colombia
e-mail: jsrudas@unal.edu.co
L. M. Gómez
Research Group in Dynamic Processes,
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: limage@unal.edu.co
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: limage@unal.edu.co
A. Toro
Tribology and Surfaces Group,
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: aotoro@unal.edu.co
Universidad Nacional de Colombia,
Medellin 050041, Colombia
e-mail: aotoro@unal.edu.co
J. M. Gutiérrez
Material Composite Group,
University of Cádiz,
Algeciras 11202, Spain
e-mail: josemaria.gutierrez@uca.es
University of Cádiz,
Algeciras 11202, Spain
e-mail: josemaria.gutierrez@uca.es
A. Corz
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 28, 2016; final manuscript received March 10, 2017; published online July 10, 2017. Assoc. Editor: Sinan Muftu.
J. Tribol. Nov 2017, 139(6): 061608 (8 pages)
Published Online: July 10, 2017
Article history
Received:
December 28, 2016
Revised:
March 10, 2017
Connected Content
A companion article has been published:
Closure to “Discussion of ‘Wear Rate and Entropy Generation Sources in a Ti6Al4V–WC/10Co Sliding Pair’” (2017, ASME J. Tribol., 139(6), p. 061608)
Citation
Rudas, J. S., Gómez, L. M., Toro, A., Gutiérrez, J. M., and Corz, A. (July 10, 2017). "Wear Rate and Entropy Generation Sources in a Ti6Al4V–WC/10Co Sliding Pair." ASME. J. Tribol. November 2017; 139(6): 061608. https://doi.org/10.1115/1.4036321
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