• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Doctoral Thesis
DOI
10.11606/T.3.2004.tde-19072005-131103
Document
Author
Full name
María Cristina Moré Farías
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2004
Supervisor
Committee
Tanaka, Deniol Katsuki (President)
Medeiros, João Telésforo Nóbrega de
Pintaúde, Giuseppe
Taqueda, Maria Elena Santos
Tschiptschin, Andre Paulo
Title in Portuguese
Influência da velocidade de deslizamento, da carga normal e da transformação martensítica induzida por deformação plástica na resistência ao desgaste por deslizamento dos aços inoxidáveis austeníticos.
Keywords in Portuguese
aços inoxidáveis austeníticos
desgaste por deslizamento
planejamento de experimentos
transformação martensítica
Abstract in Portuguese
Neste trabalho, estudaram-se os mecanismos de desgaste por deslizamento dos aços AISI 304 e AISI 316 em função da carga normal (de 6 N a 20 N) e da velocidade tangencial (de 0,07 m/s a 0,81 m/s). De acordo com o planejamento fatorial 23, realizaram-se ensaios de desgaste em equipamento convencional, do tipo pino-contra-disco. Foram usadas técnicas de análise das superfícies e das partículas após o desgaste: microscopia eletrônica de varredura (MEV), difração de raios-X, espectroscopia Mössbauer, rugosidade, temperatura e dureza instrumentada. Concluiu-se que os mecanismos de desgaste por deslizamento para os aços AISI 304 e AISI 316 são dominados pela deformação plástica (desgaste por oxidação de partículas metálicas, desgaste adesivo e desgaste misto). A variação da taxa de desgaste dos dois materiais dependeu do efeito da interação entre os níveis de carga normal e velocidade tangencial. Por meio do planejamento composto central, foi possível obter um modelo empírico da variação da taxa de desgaste em função da carga normal e da velocidade.
Title in English
Influence of sliding velocity, applied load and strain-induced martensitic transformation on the sliding wear resistance of the austenitic stainless steels.
Keywords in English
austenitic stainless steels
experiments design
martensitic transformation
sliding wear
Abstract in English
In this work, sliding wear mechanism of AISI 304 and AISI 316 austenitic stainless steels were studied as a function of the applied load (from 6 N to 20 N) and the tangential velocity (from 0.07 m/s to 0.81 m/s). Following the 23 factorial design, wear experiments were performed using a conventional pin-on-disc machine. Worn surfaces and wear debris analysis techniques were used: scanning electron microscopy (SEM), X-ray diffraction, Mössbauer spectroscopy, stylus profiling, surface temperature measurement and instrumented indentation. Plasticity-dominated wear (metallic debris oxidation, adhesive wear and mixed wear) are the sliding wear mechanisms for AISI 304 and AISI 316 steels. The wear rate behavior depended on interaction effect between applied load and tangential velocity. An empirical model of wear rate as a function of applied load and tangential velocity was obtained by means of the central composite design.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2005-09-27
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
Centro de Informática de São Carlos
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2022. All rights reserved.