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Content available remote Fatigue crack growth rate, microstructure and mechanical properties of diverse range of aluminum alloy: a comparison
Brahami A., Bouchouicha B., Zemri M., Fajoui J.
Mechanics and Mechanical Engineering
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2018
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Vol. 22, nr 1
329–-339
EN
In practice for all metallic materials, damage by fatigue usually takes in two steps, the appearance of an initial crack which then grows as a function of the present microstructure. The objective of this study is to identify the elements influencing the fatigue crack growth rate on aluminum alloys of different microstructures. Characterization tests and microstructural analysis on 2024-T3, 5083-H22, 6082-T6 and 7075-T6 shades have been carried out. Based on the experimental results obtained, AA7075-T6 has the best fatigue crack rate resistance which is explained by its behavior as well as the nature and dispersive distribution of the secondary element.
2
Content available remote Fatigue crack growth rate, microstructure and mechanical properties of diverse range of aluminum alloy: a comparison
Brahami A., Bouchouicha B., Zemri M., Fajoui J.
Mechanics and Mechanical Engineering
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2018
|
Vol. 22, nr 4
1453--1462
EN
In practice for all metallic materials, damage by fatigue usually takes in two steps, the appearance of an initial crack which then grows as a function of the present microstructure. The objective of this study is to identify the elements influencing the fatigue crack growth rate on aluminum alloys of different microstructures. Characterization tests and microstructural analysis on 2024-T3, 5083-H22, 6082-T6 and 7075-T6 shades have been carried out. Based on the experimental results obtained, AA7075-T6 has the best fatigue crack rate resistance which is explained by its behavior as well as the nature and dispersive distribution of the secondary element.
3
Content available remote Effect of heat treatment parameters on mechanical properties of medium carbon steel
Blaoui M. M., Zemri M., Brahami A.
Mechanics and Mechanical Engineering
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2018
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Vol. 22, nr 4
909--918
EN
Engineering materials, mostly steel, are heat treated under controlled sequence of heating and cooling to alter their physical and mechanical properties to meet desired engineering applications. This paper presents a study of the influence of austenitization temperature, cooling rate, holding time and heating rate during the heat treatment on microstructure and mechanical properties (tensile strength, yield strength, elongation and hardness) of the C45 steel. Specimens undergoing di erent heat treatment lead to various mechanical properties which were determined using standard methods. Microstructural evolution was investigated by scanning electron microscopy (SEM). The results revealed that microstructure and hardenability of the C45 steel depends on cooling rate, austenitization temperature, holding time and heating rate.
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