Journal
Scientific and technical journal «Priborostroenie»
UDK620.3
Issue:6 (63)
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EFFECT OF INTENSIVE PLASTIC DEFORMATION ON THE STRUCTURE AND PROPERTIES OF THE ALUMINUM ALLOY SYSTEM AL-CU-MG
Annotation
The structure and properties of discs from cast coarse-grained D16 alloy are investigated using optical metallography and transmission electron microscopy, after heat treatment (HT) in traditional modes or exposition to intensive plastic deformation by torsion (IPDT) under pressure of 6 GPa at room temperature. The standard HT modes include: Т4 (hardening at 495°С + natural aging at room temperature for 5 days) and Т6 (hardening at 495°С + artificial aging at 185°С for 10 hours). It is shown that after HT of alloy D16 in T6 and Т4 modes, the grain size decreases by about 4.8 times, and the microhardness increases by 1.6 times, as compared to the initial characteristics. After one or ten revolutions of IPDT, the sizes of structural elements in D16 alloy decreases by 393 and 899 times, and microhardness increases by 2,4 and 2,9 times, respectively.
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