Open AccessEvolution of the structure and mechanical properties of the Mg-1%Zn-0.2%Ca alloy during ECAP
Author(s) -
Olya B. Kulyasova,
I. A. Evdokimova,
Р. К. Исламгалиев
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/672/1/012035
Subject(s) - materials science , indentation hardness , microstructure , ultimate tensile strength , ductility (earth science) , alloy , metallurgy , magnesium alloy , pressing , grain size , composite material , creep
Microstructure of the Mg-1%Zn-0.2%Ca magnesium alloy after equal-channel angular pressing (ECAP) has been investigated. It was shown that an increase of the shear strain leads to significant grain refinement, as well as to the improved uniformity of microhardness. As a result of grain refinement by ECAP processing, the microhardness was increased to a value of 45.5, which is 28% higher than the initial state. Tensile tests demonstrated the enhanced ultimate tensile strength of 248.1 MPa, yield stress of 153.2 MPa, ductility of 19.4 % whereas in the initial coarse-grained state these parameters were 124 MPa, 45.3 MPa and 8.7 %, accordingly.