NDLI: Multi Directional Forging of 2024 Al Alloy After Different Heat Treatments: Microstructural and Mechanical Behavior

Content Provider	Springer Nature Link
Author	Asadi, Saeed Kazeminezhad, Mohsen
Copyright Year	2016
Abstract	Improvement of mechanical properties and microstructure of 2024 aluminum alloy by performing a severe plastic deformation method, called multidirectional forging (MDF), and heat treatment was the aim of this research. In this work, the effects of different heat treatments such as annealing, solid solution, peak ageing and over ageing before MDF on mechanical properties and microstructure of the alloy were studied. Microstructure evolution during severe plastic deformation was considerably affected by the precipitates and non-shearable particles. On the other hand, the severe plastic deformation had different effects on precipitates in the microstructure. Fragmentation, scattering and dissolution of precipitates were the examples of these effects. The study of X-ray diffraction patterns of 8 passes MDFed annealed samples showed that the cell size was decreased to 310 nm while this value was 270 nm for 8 passes MDFed overaged samples. Also, SEM images showed that fragmentation and scattering of precipitates occurred in widespread. The results of hardness and shear punch tests illustrated that the hardness and shear strength of samples were heavily increased by MDF. The increased values were 55 % for 8 passes MDFed annealed samples and 40 % for 8 passes MDFed overaged samples. Applying 2 passes of MDF on super saturated samples resulted in dynamic precipitation and consequently shear strength was increased up to 70 %.
Starting Page	1707
Ending Page	1719
Page Count	13
File Format	PDF
ISSN	09722815
Journal	Transactions of the Indian Institute of Metals
Volume Number	70
Issue Number	7
e-ISSN	09751645
Language	English
Publisher	Springer India
Publisher Date	2016-10-07
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Severe plastic deformation 2024 alloy Heat treatment Precipitates Metallic Materials Materials Science Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys

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