The effect of structural changes on the mechanical properties of the Mg-1%Zn-0.2%Ca alloy processed by ECAP

6th International Conference on Nanomaterials and Materials Engineering

Kulyasova, O.B.^1,2 ; Islamgaliev, R.K.^1

Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 Karl Marx Street, Ufa

450008, Russia^1

Saint Petersburg State University, 7/9 Universitetskaya nab., St.Petersburg

199034, Russia^2

关键词: Average grain size;    Equivalent strains;    Homogenized state;    Ultimate tensile strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/380/1/012013/pdf
DOI  :  10.1088/1757-899X/380/1/012013

来源: IOP

【 摘 要 】

The structure of the magnesium alloy Mg-1%Zn-0.2%Ca after equal-channel angular pressing (ECAP) has been studied by optical and scanning electron microscopy. It was established that increasing the equivalent strain by increase a number of passes through a ECAP die leads to more pronounced grain refinement in the alloy. When equivalent strain achieved 7.2, an average grain size of 2 μm was observed. It was shown that the ECAP samples enable to demonstrate the high microhardness of 69.5 HV and the enhanced ultimate tensile strength of 282 MPa, which is more than 2 times higher in comparison with the homogenized state, while maintaining ductility.