ISSN 2594-5327
58th Congresso anual — Vol. 58 , num. 1 (2003)
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Abstract
It is known that extensive plastic deformation occurs in the near-surface regions of the austenitic stainless steels subjected to sliding wear. This plastic deformation depends on the microstructure of these materials and leads to differences in their friction and wear behavior. It has been reported that tribological behavior of the austenitic stainless steels is related to the relative stability of the austenite structure or to the occurrence martensitic transformation. Nevertheless, it depends on operational parameters such as load, velocity, temperature and test duration. Statistical design of experiment is an effective method for the characterization of the tribological behavior of materials. It allows an assessment of the main effects of the single parameters and the interaction of all operational parameters. In the present investigation, an attempt was made to research the relative effects of the various sliding conditions on the wear of the austenitic stainless steel. Also, it was investigated the interaction effects of the sliding conditions and the stability of the austenite. The tests were performed following two levels factorial design approach (2³). The tribosystem parameters taken into account were applied load, sliding velocity and material type. The wear behavior was quantitatively evaluated using sliding wear testing under non-lubricated conditions with a pin-on-disk geometry. The average friction force was obtained using the acquisition system of the machine (TE-79 model, manufactured by Plint&Partners), which acquired data from a strain gauge sensor during the testing time. It was used applied load values of 8 N and 20 N, sliding speed values of 0.007 m/s and 0.071 m/s with AISI 304 and AISI 316 austenitic stainless steels, which presents different tendency to form strain induced martensite. After the wear tests, the pin and debris were examined by scanning electron microscopy (SEM), which was equipped with an energy dispersive X-ray spectrometer (EDS). It was demonstrated that mass loss increases with applied load and sliding velocity but decreases with stability of the austenite. It was also noted the effect of sliding velocity is more significant than the other single factors. In addition, the interaction effect of the sliding conditions and stability of the austenite was significant. From these statistical results, it was observed that the wear of the pin increase with occurrence of martensitic transformation and depends strongly on sliding velocity values.
It is known that extensive plastic deformation occurs in the near-surface regions of the austenitic stainless steels subjected to sliding wear. This plastic deformation depends on the microstructure of these materials and leads to differences in their friction and wear behavior. It has been reported that tribological behavior of the austenitic stainless steels is related to the relative stability of the austenite structure or to the occurrence martensitic transformation. Nevertheless, it depends on operational parameters such as load, velocity, temperature and test duration. Statistical design of experiment is an effective method for the characterization of the tribological behavior of materials. It allows an assessment of the main effects of the single parameters and the interaction of all operational parameters. In the present investigation, an attempt was made to research the relative effects of the various sliding conditions on the wear of the austenitic stainless steel. Also, it was investigated the interaction effects of the sliding conditions and the stability of the austenite. The tests were performed following two levels factorial design approach (2³). The tribosystem parameters taken into account were applied load, sliding velocity and material type. The wear behavior was quantitatively evaluated using sliding wear testing under non-lubricated conditions with a pin-on-disk geometry. The average friction force was obtained using the acquisition system of the machine (TE-79 model, manufactured by Plint&Partners), which acquired data from a strain gauge sensor during the testing time. It was used applied load values of 8 N and 20 N, sliding speed values of 0.007 m/s and 0.071 m/s with AISI 304 and AISI 316 austenitic stainless steels, which presents different tendency to form strain induced martensite. After the wear tests, the pin and debris were examined by scanning electron microscopy (SEM), which was equipped with an energy dispersive X-ray spectrometer (EDS). It was demonstrated that mass loss increases with applied load and sliding velocity but decreases with stability of the austenite. It was also noted the effect of sliding velocity is more significant than the other single factors. In addition, the interaction effect of the sliding conditions and stability of the austenite was significant. From these statistical results, it was observed that the wear of the pin increase with occurrence of martensitic transformation and depends strongly on sliding velocity values.
Keywords
sliding wear, austenitic stainless steel, factorial design
sliding wear, austenitic stainless steel, factorial design
How to cite
Farias, M. C. M.; Taqueda, M. E. S.; Tanaka, D. K.; Sinatora, A..
STUDY OF SLIDING WEAR BEHAVIOR OF AUSTENITIC STAINLESS STEELS THROUGH FACTORIAL DESIGN OF EXPERIMENT,
p. 2140-2149.
In: 58th Congresso anual,
Rio de Janeiro, Brasil,
2003.
ISSN: 2594-5327, DOI 10.5151/2594-5327-2831
