Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Nelson B. de Lima"'
Publikováno v:
Metals, Vol 12, Iss 12, p 2115 (2022)
Maraging steels are precipitation hardening alloys that can achieve an ultra-high yield strength (~3 GPa), however associated with low toughness. During exposure to high temperatures, an oxidation process occurs on the surface of these steels, genera
Externí odkaz:
https://doaj.org/article/0b00df33512743df80c55abb572860ec
Autor:
Mauro M. de Oliveira, Antônio A. Couto, Gisele F. C. Almeida, Danieli A. P. Reis, Nelson B. de Lima, Renato Baldan
Publikováno v:
Metals, Vol 9, Iss 3, p 301 (2019)
Inconel 625 is a nickel-based alloy that is mainly used in high-temperature applications. Inconel 625 exhibits an unstable plastic flow at elevated temperatures characterized by serrated yielding, well-known as the Portevin-Le Chatelier effect. The e
Externí odkaz:
https://doaj.org/article/97e4f26431d64d9385a5e3d7f79bfc33
Autor:
Michele C. B. de Castro, Antônio A. Couto, Gisele F. C. Almeida, Marcos Massi, Nelson B. de Lima, Argemiro da Silva Sobrinho, Mariano Castagnet, Gleicy L. Xavier, Rene R. Oliveira
Publikováno v:
Materials, Vol 12, Iss 3, p 520 (2019)
The Ti-6Al-4V alloy is widely used in the manufacture of components that must have low density and high corrosion resistance and fatigue strength. The fatigue strength can be improved by surface modification. The aim of this study was to determine th
Externí odkaz:
https://doaj.org/article/a18a52347307473d9531506705a629e9
Autor:
Gisele F. C. Almeida, Antônio A. Couto, Danieli A. P. Reis, Marcos Massi, Argemiro S. da Silva Sobrinho, Nelson B. de Lima
Publikováno v:
Metals, Vol 8, Iss 8, p 618 (2018)
This work aimed to enhance the creep resistance of Ti-6Al-4V alloy treated by plasma nitriding. The nitriding was performed on specimens with a Widmanstätten microstructure for four hours at 690 °C under a gas atmosphere containing Ar:N2:H2 (0.455:
Externí odkaz:
https://doaj.org/article/08a7ace2a93f4580ac918d1cd2e72433