Microstructural Evaluation of Ti-6Al-4V Alloy Treated With Pulsed Laser Nd:YAG 2012-36-0413
The present study concerns laser surface nitriding of Ti-6Al-4V. The Ti-6Al-4V alloy was submitted a superficial treatment of pulsed laser Nd:YAG (λ=1.064 μ\m) in atmosphere of 40wt% nitrogen-60wt% argon. The samples were characterized by optical microscopy and electron scanning microscopy. The microstructure of the surface nitrided Ti-6Al-4V consists of TiN dendrites distributed in α--Ti matrix. It can be noted that there is a significant enhancement in surface roughness after surface nitriding (6.60 μm) as compared to the as received Ti-6Al-4V (0.46 μm). The microhardness of the surface is improved to 1100 VHN as compared to the 340 VHN of substrate.
Adriano Goncalves dos Reis, Carlos de Moura Neto, Fabricia Assis Resende, Danieli Aparecida Pereira Reis, Francisco Piorino Neto, Joao Paulo Barros Machado
Instituto Tecnologico de Aeronautica, Universidade de Sao Paulo, Universidade Federal de Sao Paulo, Departamento de Ciencia e Tecnologia Aeroespacial, Instituto Nacional de Pesquisas Espaciais
21st SAE Brasil International Congress and Exhibition