Coupling Thermomechanical Processing and Alloy Design to Improve Textures in Mg-Zn-Ca Sheet Alloys
Coupling Thermomechanical Processing and Alloy Design to Improve Textures in Mg-Zn-Ca Sheet Alloys
复制标题
耦合热机械加工和合金设计以改善 Mg-Zn-Ca 板材合金的织构
作者：
T. Berman;J. Allison
系统地研究和量化了Ca和Zn添加量对Mg-Zn-Ca合金热加工过程中组织和织构演变的影响。在Gleeble热机械模拟器中进行平面应变压缩测试，以物理模拟10道轧制计划，同时允许仔细控制和监测加工参数。变形后三元合金试样的织构表现出较弱的最大基底强度和横向扩展。将三元合金中Zn含量提高到3.2 wt.%，试样在变形状态下织构变弱。重要的是，这些合金在变形后退火过程中的静态再结晶（SRX）促进了理想的环状织构，c轴从法向倾斜，基底织构强度较低。在SRX过程中织构的演变与具有宽晶粒取向展布和低再结晶程度的变形组织有关。
The effect of Ca and Zn additions on the microstructure and texture evolution during thermomechanical processing of Mg-Zn-Ca sheet alloys was systematically investigated and quantified. Plane strain compression testing in a Gleeble thermomechanical simulator was used to physically simulate a 10-pass rolling schedule, while allowing for careful control and monitoring of the processing parameters. Textures in the as-deformed ternary alloy samples demonstrate a weak maximum basal intensity and spreading in the transverse direction. Increasing the Zn content to 3.2 wt.% in the ternary alloys resulted in samples that exhibited weak textures in the as-deformed state. Importantly, static recrystallization (SRX) during post-deformation annealing of these alloys promoted a desirable annular texture, with the c-axis tipped from the normal direction and a lower basal texture intensity. The evolution in texture during SRX is associated with as-deformed microstructures with broad grain orientation spreads and a low degree of recrystallization.