Open AccessMicrostructure and mechanical properties of Mg-2Sn-1.95Ca-0.5Ce alloy with different extrusion speeds
Author(s) -
Jianxun Wu,
Hong Shen,
Maochao Zhang,
Yungui Chen
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abdbf9
Subject(s) - extrusion , microstructure , materials science , ultimate tensile strength , grain size , elongation , alloy , dynamic recrystallization , recrystallization (geology) , metallurgy , texture (cosmology) , composite material , hot working , paleontology , artificial intelligence , biology , computer science , image (mathematics)
Effects of extrusion speeds (0.3, 1.2, 1.8 and 3.5 mm s −1 ) on the microstructure and mechanical properties of the Mg–2Sn–1.95Ca–0.5Ce (TXCe220) alloy were analyzed by various detection methods in this article. The results have revealed that extrusion speed exerts a prominent influence towards grain size, recrystallization fraction and texture. As the extrusion speed increases, the microstructure characteristics transform from bimodal grain morphology to the near complete dynamical recrystallization (DRX). The tensile yield strength of TXCe220 decreased from 365 MPa to 180 MPa accompanied by the elongation increasing from 4.0 % to 19.4 % when the ram speed rises from 0.3 mm s −1 to 3.5 mm/s. The high yield strength of low-speed extruded alloys should be mainly ascribed to the nano-scale Mg 2 Ca with diameter of 30–80 nm precipitates, fine DRX grains and strong texture.