Effect of heat treatment and cryotreatment on the fatigue crack growth in aluminium 7075 alloy

被引：0
|
作者：
Arunakumara P.C. [1 ]
Venkatesh D. [1 ]
Phaneesh K.R. [1 ]
机构：
[1] Dept. of Mech. Engg., M.S. Ramaiah Institute of Tech., Bengaluru, Karnataka
来源：
International Journal of Vehicle Structures and Systems | 2020年 / 12卷 / 04期
关键词：
Annealing; Cryogenic treatment; Fatigue crack growth; NASGRO;
D O I：
10.4273/ijvss.12.4.21
中图分类号：
学科分类号：
摘要：
Al 7075 is an aluminium alloy with zinc as major element. Al 7075 is commonly used in aircraft components, especially for critical parts like wing and fuselage components. In present investigation Al 7075 has been selected subjected to annealing, cryogenic treatment and the combination of annealing and cryogenic treatment for the study of fatigue crack growth subjected to fatigue load at constant amplitude. Specimens were subjected to fatigue crack growth as per ASTM E-647 standards and the results of fatigue crack growth were compared. NASGRO software was used to predict the fatigue crack growth (FCG) and the results are validated using experimental results. Microstructure analysis of metallic specimens was also carried out to study the micro structural changes in specimens undergoing heat treatment and cryotreatment. From the present investigation it has been observed that cryogenic treatment and heat treatments plays vital role in improving fatigue life of Al 7075 components. © 2020. MechAero Foundation for Technical Research & Education Excellence.
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页码：460 / 464
页数：4
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