|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Technology 2018
||Influence of Low Temperature Forging on Microstructure and Low Cycle Fatigue Behavior of Cast AZ31B Mg Alloy
||D. Toscano, Sugrib K Shaha, S. B. Behravesh, H. Jahed, Bruce W Williams
|On-Site Speaker (Planned)
||Sugrib K Shaha
The effect of low temperature forging on the microstructure, quasi-static response and stress-controlled fatigue behavior of cast AZ31B Mg alloy was investigated. The forging process was conducted at a temperature of 275°C and a forging rate of 20mm/s. Fully reversed stress controlled cyclic tests were performed on cast and forged mate-rial under total stress amplitudes of 120 to 160 MPa. Neckless type bimodal grain structure, an indication of incomplete dynamic recrys-tallization was observed in the forged microstructure in addition to the development of a sharp basal texture. The obtained mechanical test results show that the forged material achieved significantly improved yield and tensile strengths along with longer fatigue life. The im-provement in the quasi-static properties was attributed to the strength-ening effect of partial grain refinement and inhibition of basal slip due to texture modification.