News

Dear Researchers,

 

It’s my pleasure to invite you to a seminar on the addition of elements to Zn-alloys – mechanical and corrosion analysis.

 

“Synergistic Role of Alloying Elements and KoBo Extrusion on the Strength–Corrosion Balance of Zn Alloys”

 

Speakers: MSc Alireza Kalhor, Prof. Kinga Rodak

 

    🗓16th of December

    ⏰11:30 AM

 

online: https://polsl-pl.zoom.us/j/99024779513?pwd=tqH8BF2pN8PZDdxo7uIa5hSd7MTeol.1

 

I encourage you to join us and take part in an engaging discussion on current trends in materials science. 

Your participation and questions will be highly appreciated.

Don't forget to have a cup of coffee ☕

 

Kind regards,

Alicja

 

 

 

Abstract:

 

This study examines how controlled additions of Mg and Ca, combined with severe plastic deformation via KoBo extrusion, influence the microstructure, mechanical performance, and corrosion behavior of Zn-based materials. Microstructural characterization using SEM and EBSD confirmed that alloying promotes the formation of Mg₂Zn₁₁ and CaZn₁₃ intermetallic phases. Numerical simulation using FORGE® NxT enabled the estimation of the equivalent strain introduced during KoBo extrusion. The ternary Zn–1.7Mg–1Ca alloy demonstrated remarkable mechanical improvement compared to pure Zn, exhibiting a 186% increase in hardness, 210% higher yield strength, and a 254% rise in ultimate tensile strength. KoBo extrusion provided an additional strengthening effect for both materials. Electrochemical testing in Ringer’s solution showed that alloying increased the corrosion rate due to micro-galvanic interactions between phases, whereas KoBo extrusion had a dual role—accelerating corrosion in pure Zn but reducing it in the ternary alloy. Overall, the synergy between alloying and severe plastic deformation offers a promising pathway for tuning the mechanical and corrosion properties of Zn-based materials for advanced applications.