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Characterization of a CuAlBe alloy with different Cr contents
Gemierson Valois da M. Candido; Tadeu Antônio de A. Melo; Victor Hugo C. de Albuquerque; Rodinei Medeiros Gomes; Severino Jackson G. de LimaIn this paper, the use of chromium (Cr) as a grain refiner for a CuAlBe shape memory alloy is discussed. Alloys with 0.1, 0.2, 0.3 and 0.5 wt.% Cr were characterized by optical microscopy, scanning electron microscope and X-ray diffraction. Also, the influence of the different percentages of Cr on the grain size and on the mechanical properties was analyzed through macro and microscopic evaluations and by tensi...
Evaluation of grain refiners influence on the mechanical properties in a CuAlBe...
Victor Hugo C. de Albuquerque; Tadeu Antonio de A. Melo; Danniel Ferreira de Oliveira; Rodinei Medeiros Gomes; João Manuel Ribeiro da Silva TavaresThis work carried out a nondestructive evaluation of grain size influence on the mechanical properties of a CuAlBe shape memory alloy with and without grain refiners. Ultrasonic signal processing, considering only the longitudinal velocity, was used for the nondestructive evaluation. Therefore, the average modulus of elasticity values found for the CuAlBe shape memory alloy was 45.7 GPa and 57.3 GPa with and wi...
Grain Size and Temperature Influence on the Toughness of a CuAlBe Shape Memory ...
Victor Hugo C. de Albuquerque; Tadeu Antonio de A. Melo; Rodinei M. Gomes; Severino Jackson G. de Lima; João Manuel R. S. TavaresThis work is a study of the influence of grain size and temperature on the toughness of CuAlBe shape memory alloys with (CuAlBeNbNi) and without NbNi (CuAlBe) grain refiner elements. The toughness analysis was based on the V-notch Charpy impact test under temperatures of -150, -100, -50, 0, 50, 100 and 150 ºC. A statistical analysis of the results led to the conclusion that the toughness of both alloys was infl...
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