Banca de QUALIFICAÇÃO: THIAGO SOUZA VIANA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : THIAGO SOUZA VIANA
DATA : 21/12/2016
HORA: 08:00
LOCAL: Sala de aulas do PPGCEM
TÍTULO:

INFLUENCE OF THERMAL TREATMENTS AT THE TEMPERATURES OF TRANSFORMATION AND MICROSTRUCTURE OF A NiTi ALLOY

PALAVRAS-CHAVES:

memory form alloy, nitinol, transformation temperatures, heat treatment.

PÁGINAS: 55
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Metalurgia de Transformação
ESPECIALIDADE: Tratamentos Térmicos, Mecânicos e Químicos
RESUMO:

In the present work the influence of heat treatments on the microstructural transformations of an approximately equiatomic NiTi- memory form alloy was investigated.  A NiTi wire with 2.5 mm in diameter, work hardened as received, was submitted to annealing heat treatments at 450°C and 500°C in order to verify the calorimetric and microstructural changes. Optical and electronic microscopy and X-rays diffraction were employed to characterize the structure and the  phases morphology. The analysis via differential scanning calorimetry  allowed the determination of the transition temperatures (Ai, Af, Mi, Mf), which showed relevant variation associated to the annealing temperatures. The microstructure  in the work hardened condition and after the annealing heat treatments was analysed in detail via field emission scanning electronic microscopy (MEV-FEG). 

MEMBROS DA BANCA:
Presidente - 2156996 - AUGUSTO JOSE DE ALMEIDA BUSCHINELLI
Interno - 1938946 - NICOLAU APOENA CASTRO
Interno - 1350249 - RUBENS MARIBONDO DO NASCIMENTO