Compressive Characteristics of AZ91 Containing Sn Alloy with the Microstructure

Abstract

The characteristics of AZ91 containing Sn alloy were investigated to understand the compressive behavior with the microstructure of the alloy in elevated temperature state. To change the microstructure, the alloys used for this study were fabricated by the permanent mould casting and cooling slope casting, respectively. The compression test of AZ91 containing Sn alloys was carried out at temperatures from R.T to 400°C and at strain rates from 1.67x10-5 to 1.67x10-3/s. Besides, in order to investigate the compressive characteristics of the alloys in the elevated temperature state, this alloys after compression test were performed by optical (OM) and results show that the compressive deformation behavior of AZ91 containing Sn alloy was affected by strain rate and deformation temperature as well as its microstructure under hot forming conditions. In the processing windows for the soundness evolution of the specimen in the compression process, the Mg alloy with a dendrite phase (by permanent mold casting) was narrower than that of the Mg alloy with a globular and fine phase (by cooling slope method).