• 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
https://doi.org/10.11606/T.18.1990.tde-27052024-154105
Document
Author
Full name
Eduvaldo Paulo Sichieri
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1990
Supervisor
Committee
Rollo, Joao Manuel Domingos de Almeida (President)
Balancin, Oscar
Gomes, Samuel Irati Novaes
Ishikawa, Tomaz Toshimi
Padilha, Angelo Fernando
Title in Portuguese
Efeito do Berilio em ligas Ni-Cr-Mo-Co e em ligas Fe-Cr-Ni
Keywords in Portuguese
aço inoxidável austenítico
forjamento
ligas metálicas
Abstract in Portuguese
Neste trabalo foi estudado o efeito do berilio sobre a microestrutura, propriedades de corrosão e mecânicas e sobre a temperatura de fusão em ligas Ni-Cr-Mo-Co e no aço de fusão sob vácuo, seguidas de forjamento em condições industriais. Após forjamento, as ligas foram tratadas termicamente em diversas temperaturas e resfriadas em água, ar e forno. Nas ligas Ni-Cr-Mo-Co a presença do Be altera a microestrutura proporcionando a formação de intermetálicos (Cr, Mo) x (Ni,Co)y. No aço inoxidável AISI-316 a presença do Be torna possível o aumento da dureza após envelhecimento. Foi constatado que nas ligas estudadas o Be abaixa a temperatura de fusão e as torna susceptíveis a corrosão por pite.
Title in English
The Beryllium effects in Ni-Cr-Mo-Co and Fe-Cr-Ni alloys
Keywords in English
austenitic stainless steel
forging
metal alloys
Abstract in English
In the present work the effect of beryllium on the microstructure, corrosion and mechanical properties and melting temperatures in Ni-Cr-Mo-Co alloys and austenitic stainless steel AISI-316 was studied. The study consisted in the obtainment of several alloys through melts under vacuum, followed by wrought in industry conditions. After wrought, the alloys were thermically treated severa L temperatures and coolled by water, air and furnance. The presence of beryllium in the Ni-Cr-Mo-Co alloys changes the microstructure providing the (Cr, Mo) x (Ni,Co)y phases. In the stainless steel AISI-316, the presence of beryllium causes an additional strengthening by aging. It was seen that in the studied alloys , the presence of beryllium decreases the melting temperatures and prometes the pite corrosion.
 
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
2024-05-27
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.