Deformation Behavior of Directionally Solidified Mg-4 wt.% Zn Alloy during Hot Compression Experiment

Jia Hongmin,Chang Jianxiu

doi:10.35840/2631-5076/9244

Abstract

The flow stress model based on the regression analysis is founded to predict the flow behavior of directionally solidified Mg-4 wt.% Zn alloy during hot deformation, and result show that the model has a great agreement with experimental dates. Besides, based on microstructural evolution observation, directionally solidified Mg-4 wt.% Zn alloy exhibits good hot workability at higher temperature and lower strain rate, and the effect of deformation temperature is more obvious than strain rate on crystallization during hot deformation.

Highlights

Mg alloys have many potential applications in aerospace, automotive and portable electronic fields due to low density, good castability and high specific strength [1,2,3,4]
Much progress has been made for developing biodegradable Mg alloys in the last decades, a number of fundamental challenges remain: (1) Many alloys tested so far are initially developed for industrial uses, typical examples are Mg-Zn-Al and Mg-RE alloys, inside which, Al and rare earth elements are toxic [9,10,11]
Directionally solidified Mg-4 wt.% Zn alloy was homogenized at 335 °C for 16 h, which was acquired in the previous study [21]

Summary

Introduction

Mg alloys have many potential applications in aerospace, automotive and portable electronic fields due to low density, good castability and high specific strength [1,2,3,4]. Mg alloys have been the focus of degradable implant research for excellent biocompatibility in human body and no signs of local or systemic toxicity [58]. In order to raise the applicability, directionally solidified Mg-Zn alloy with outstanding corrosion resistance and good biodegradability is developed in our previous research [18]. The formability of directionally solidified Mg alloy is unknown and few researches about hot deformation behavior of directionally solidified Mg alloy are reported. Directionally solidified Mg-4 wt.% Zn alloy was prepared to investigate the deformation behavior and microstructure evolution via hot compression to provide guidance for biomedical application of directionally solidified Mg alloys

Material and Methods

Results and Discussion

Conclusions