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| Author(s): |
Andreia Ranzan
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Escola Politécnica (EP/BC) |
| Defense date: | 2004-12-16 |
| Examining board members: |
Deniol Katsuki Tanaka;
Isabel Correia Guedes;
Marcia Marie Maru;
Carlos Henrique da Silva
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| Advisor: | Deniol Katsuki Tanaka |
| Abstract | |
This Thesis presents an experimental study of the influence of mantensitic transformation on the wear-corrosion synergism. Two sets of wear tests were performed: pin-on-disk sliding wear and cavitation tests. The tested metallic materials were: AISI 304, AISI 316 and AISI 420 stainless steels. The performed testing conditions were: dry and in 3,5 % NaCl solution sliding wear tests, and the cavitation tests were performed in distillated water and aqueous NaCl 3,5 % solution. The wear behavior was evaluated by mass loss, friction coefficient measurements, scanning electronic microscopy and X-ray diffraction analysis. For the corrosion tests environment aqueous 3,5% NaCl solution was used. The corrosion behaviors were evaluated through potenciodynamic polarization and gravimetric immersion tests. Martensitic transformation had major influence on the wear and corrosion resistance of studied materials. Surfaces morphology differences were observed between the cavitation and sliding wear test results. (AU) | |