Effect of plasma nitriding on the creep and tensile properties of the Ti-6Al-4V alloy
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This work aimed to enhance the creep resistance of Ti-6Al-4V alloy treated by plasma
nitriding. The nitriding was performed on specimens with aWidmanstätten microstructure for four
hours at 690 C under a gas atmosphere containing Ar:N2:H2 (0.455:0.455:0.090). X-ray diffraction
analysis showed that the "-Ti2N and -TiN formed on the nitrided sample, in addition to the -Ti
and -Ti matrix phases. The layer thickness of this sample was about 1 m. Hot tensile tests
were performed in the temperature range of 500 to 700 C on nitrided and non-nitrided samples,
which indicated an increased strength of the nitrided samples. The same temperature range was
used for the creep tests in a stress range of 125 to 319 MPa. The plasma-nitrided samples exhibited
better creep resistance when compared to the untreated samples. This result was demonstrated by
the decreased secondary creep rate and the increased final creep time. This improvement in the
creep resistance appeared to be associated with the formation of the nitrided layer, which worked
as a barrier to oxygen diffusion into the material and due to the formation of a surface residual
compressive stress.
Como referenciar
ALMEIDA, GISELE F.C.; COUTO, ANTONIO A.; REIS, DANIELI A.P.; MASSI, MARCOS; SILVA SOBRINHO, ARGEMIRO S. da; LIMA, NELSON B. de. Effect of plasma nitriding on the creep and tensile properties of the Ti-6Al-4V alloy. Metals, v. 8, n. 8, p. 1-15, 2018. DOI: 10.3390/met8080618. Disponível em: http://repositorio.ipen.br/handle/123456789/29261. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.