Microstructural Characterization of Aluminum under Thermal Fatigue
Tulio P. Madruga, UFRGS, Porto Alegre, RS, Brasil
ABSTRACT High purity aluminum (>99%) was submitted to thermal fatigue between 250 to 1000oC. After 3000 cycles the mechanical resistance decreased. The microstructural evaluation by SEM showed cracks produced in the surface. The grain size was obtained by thermal attack. Significant variation of grain size was not observed. By increasing the number of cycles, it was observed a crack propagation. The mechanism of crack propagation was associated with a coalescence of porous.
Publication Source: NDTISS '99 - International Symposium on NDT Contribution to the Infrastructure Safety Systems, Nov 1999 in Tores Brazil.
Publisher: Center of Tecnology, Federal University of Santa Maria (UFSM) - [Homepage]
© NDTnet
