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Comparative analysis of microstructures formed in highly alloyed aluminum alloy during high-temperature equal-channel angular pressing and multidirectional forging

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Inorganic Materials: Applied Research : Volume 7, Issue 1, January 2016

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Comparative analysis of microstructures formed in highly alloyed aluminum alloy during high-temperature equal-channel angular pressing and multidirectional forging

Content Provider	Springer Nature Link
Author	Sitdikov, O. Sh.
Copyright Year	2016
Abstract	A comparative analysis of structural changes in the high-strength aluminum 7475 alloy subjected to equal channel angular pressing (ECAP) and multidirectional forging (MDF) at a temperature of 400°C (~0.75 T $_{m}$) is performed. It is shown that both ECAP and MDF of the present alloy led to significant grain refinement. The main mechanism of structural changes is mainly related to the formation of deformation bands such as geometrically necessary boundaries and microshear bands, which propagate in various directions and fragment initial grains, thus developing in “continuous” dynamic recrystallization. Comparison between ECAP and MDF performed to roughly the same strain values reveals the formation of similar micro-structures, which are characterized by close values of the average misorientation angles and the fractions of high-angle boundaries. It is also found that, irrespective of the deformation scheme, the grain size developed in both ECAP and MDF obeys a common dependence (unique function) on Zener–Hollomon parameter Z. Microstructure evolution in the highly alloyed aluminum alloy during high-temperature severe plastic deformation and the effect of severe plastic deformation techniques on grain refinement are discussed in detail.
Starting Page	149
Ending Page	157
Page Count	9
File Format	PDF
ISSN	20751133
Journal	Inorganic Materials: Applied Research
Volume Number	7
Issue Number	2
e-ISSN	2075115X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-05-12
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	aluminum alloy high-temperature equal channel angular pressing high-temperature multidirectional forging deformation bands continuous dynamic recrystallization Inorganic Chemistry Industrial Chemistry/Chemical Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Engineering Materials Science

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