Study of the effect of nitriding in the Ti-6Al-4V alloy submitted to creep tests

Study of the effect of nitriding in the Ti-6Al-4V alloy submitted to creep tests

This work aims to evaluate the effect of plasma nitriding on the Ti-6Al-4V alloy with a typical structure of Widmanstatten subjected to creep tests at 600 degree C. The results showed that the Ti-6Al-4V alloy had a hardness of 300 plus or minus 17 HV. After treatment thermochemical by plasma, was ob...

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Veröffentlicht in:Tecnologia em Metalurgia, Materiais e Mineracao Materiais e Mineracao, 2010-01, Vol.20100726, p.3639-3648
Hauptverfasser: De Oliveira, Veronica Mara Cortez Alves, Barboza, Miguel Justino Ribeiro, Pinto, Catia Gisele, Da Silva, Mariane Capellari Leite, Suzuki, Paulo Atsushi, Reis, Danieli Aparecida Pereira, Machado, Joao Paulo B, Neto, Francisco Piorino
Format: Artikel
Sprache:eng
Schlagworte:
Creep (materials)
Creep tests
Diffraction
Hardness
Ion nitriding
Phases
Titanium base alloys
Widmanstatten structure
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Zusammenfassung:This work aims to evaluate the effect of plasma nitriding on the Ti-6Al-4V alloy with a typical structure of Widmanstatten subjected to creep tests at 600 degree C. The results showed that the Ti-6Al-4V alloy had a hardness of 300 plus or minus 17 HV. After treatment thermochemical by plasma, was observed the formation of a nitrided layer of thickness of 4 mu m and hardness of 1539 plus or minus 157 HV due to presence of the Ti(2)N and TiN phases identified by X-ray diffraction. The plasma nitriding reduced the values of average roughness of 1,29 mu m to 1,18 mu m. The creep properties of nitrided specimens were significantly improved in comparison with those of the unnitrided Ti-6Al-4V alloy.
ISSN:2176-1515