%0 Journal Article
%4 sid.inpe.br/plutao/2018/06.18.15.47
%2 sid.inpe.br/plutao/2018/06.18.15.47.34
%@doi 10.1051/matecconf/201816514001
%@issn 2261-236X
%F lattes: 7698697775899601 5 VellosoNoTaCiOlBaVo:2018:TeEf
%T Fatigue behavior of Ti-6Al-4V alloy modified by plasma immersion ion implantation: temperature effect
%D 2018
%9 conference paper
%A Velloso, Verônica,
%A Nozaki, Leonardo,
%A Tapia, Diego,
%A Cioffi, Maria Odila,
%A Oliveira, Rogério de Moraes,
%A Barboza, Miguel,
%A Voorwald, Herman,
%@affiliation Universidade Estadual Paulista (UNESP)
%@affiliation Universidade Estadual Paulista (UNESP)
%@affiliation Universidad Nacional de Ingeniería (UNI)
%@affiliation Universidade Estadual Paulista (UNESP)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade de São Paulo (USP)
%@affiliation Universidade Estadual Paulista (UNESP)
%@electronicmailaddress veronicamcaoliveira@gmail.com
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress rogerio.oliveira@inpe.br
%B Matec Web of Conferences
%V 165
%P e14001
%X This research studied Ti-6Al-4V alloy behavior with two (2) different microstructure subjected to nitrogen addition by PIII treatment, with and without sample heating, under cyclic load. PIII conditions, at 390 °C, were DC voltage of 9.5 kV, frequency of 1.5 kHz and pulse of 40 µs. PIII conditions, with sample heating at 800 °C, were 7 kV, 0.4 kHz and 30 µs. Axial fatigue tests were performed on untreated and treated samples for resistance to fatigue comparison. The untreated Ti-6Al-4V had an annealed microstructure, PIII treatment at 390 °C resulted in a microstructure that has no nitride layer or diffusion zone. In the PIII treatment at 800 °C, the microstructure presented nitride layer and diffusion zone. Resistance to fatigue decreased with PIII treatments in both temperatures. At 390 °C, the treatment created deformation regions and cracks on surface due to nitrogen implantation that formed solid solution with titanium and imposed lattice strains on the crystal lattice. At 800 °C, bulk ductility decrease, increasing of αTi proportion in microstructure due to α case formation and the presence of a ceramic layer dropped fatigue resistance of Ti-6A-4V alloy.
%@language en
%3 velloso_fatigue.pdf