| Autor: |
Azad, Bahram, Semnani, Hamidreza, Borhani, Ehsan |
| Zdroj: |
Transactions of the Indian Institute of Metals; Dec2017, Vol. 70 Issue 10, p2725-2732, 8p |
| Abstrakt: |
An Al-0.2 wt%Zr alloy was subjected to an accumulative roll bonding (ARB) process up to a strain of 8.0. The process led to ultrafine-grained materials with a mean grain size of 400 nm by 10-cycle ARB process, which was studied by atomic force microscopy (AFM). The Vickers microhardness measurements showed that the hardness value monotonously increased the number of ARB cycles and then reached a constant value of about 45 HV. Yield strength and tensile strength increased during the ARB process and reached to 125 and 158 MPa, respectively, after 10-cycles ARB process. The total elongation and uniform elongation were 65 and 48% before the ARB process and decreased after 10-cycle ARB to 17.5 and 6.5%, respectively. Also, after the tensile test, the fracture surfaces were studied by scanning electron microscope (SEM) and the result showed that the fracture mode in the 0 cycle (before ARB) and 1 cycle was ductile and changed to brittle with further ARB processing from 3 up to 10 cycles. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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