Efectos de la aplicación de tratamientos isotérmicos sobre el tamaño de grano y la dureza de aleaciones de aluminio AA5083-H116

AUTOR(ES)

Unfried-Silgado, Jimy, del Río, Julieth López, Vargas, Dinayra Machuca, Caicedo, Ellery Pérez, Pinedo, Carlos Zambrano, Núñez, Enrique Esteban Niebles

FONTE

Matéria (Rio J.)

DATA DE PUBLICAÇÃO

02/05/2017

RESUMO

ABSTRACT In this work is studied the relationship between morphological characteristics of grain and hardness of aluminum alloys AA5083-H116, which has been submitted to several isothermal treatments. For analysis development were used optical and scanning electron microscopy, chemical microanalysis, hardness measurements, differential scanning calorimetry (DSC) curves, computational thermodynamics calculations, and image digital analysis, aiming to determine the recrystallization and abnormal grain growth temperatures, as well as phase transformations associated to thermal cycles. It was determined that static recrystallization start temperature is between 150° to 180°C, which was observed as heterogeneous process at whole rolled structure of material, while a possible abnormal grain growth process is initiated at 300°C, approximately. The results of this work are important because helping to understand the microstructure evolution due to processes of fabrication, which have similar thermal cycles, such as welding and heat treatments applied on this kind of material.

Documentos Relacionados

• Efectos de la temperatura, el ambiente lumínico y la escarificación sobre la germinación de semillas de Bromelia serra Griseb. (Bromeliaceae)
• Influencia de las mezclas de gases Ar-He y Ar-He-O2 en la soldabilidad de la aleación de aluminio AA5083-O usando Proceso GMAW-P automatizado
• Evaluación de la dureza superficial en amalgamas en función de tipos de aleaciones, momentos y tipos de pulimentos
• Efectos de la aplicacion de polimeros sinteticos en las caracteristicas y propriedades de um suelo salino-sodico.
• Enfoques conceptuales y propuestas metodológicas para el estudio de las interacciones entre el medio ambiente y la salud: aplicación a un programa de investigación sobre la tripanosomiasis americana