Study of the microstructure an‎d mechanical properties of Zn-1.5Mg alloy processed by ECAP method

9/3/2026 12:00:00 AM

In this study, the effect of the number of hot ECAP passes an‎d heat treatment on the tensile properties an‎d microstructure of Zn-1.5Mg alloy was studied. The alloy was cast an‎d then hot ECAP process was performed on it at a temperature of 200°C with an initial strain rate of 0.0003 s-1 an‎d the production samples were subjected to 2, 1 an‎d 4 passes. Then, mechanical property tests including tensile test an‎d hardness measurement as well as microstructural examination including metallographic, SEM an‎d EDS tests were performed on the samples. The results showed that with increasing the number of passes, the tensile strength of the final parts increased to 151, 209, 230 an‎d 258 MPa, respectively, an‎d also their percentage of length increased to 91%, 41% an‎d 140%, respectively. After ECAP, the samples of 3, 2, 1 an‎d 4 passes were annealed at two temperatures of 50°C an‎d 100°C for 30 minutes an‎d cooled in the environment. Tensile an‎d hardness tests an‎d microstructural examination were performed on the samples. It was shown that by annealing at 150°C, the 4-pass sample showed a 3.4% increase in tensile strength compared to the unannealed sample, an‎d its thermal stability increased to 31%. At 100°C, the 4-pass sample also showed a 1.1% increase in tensile strength an‎d its elongation reached 31%.

ECAP: ، آلياژ Zn-1.5Mg ، تغييرشكل پلاستيك شديد، عمليات حرارتي

ECAP, Zn-1.5Mg alloy, severe plastic deformation, heat treatment

Yeganeh Sadat Amirkhalili

Dr. Hamidreza Jafarian