不同Gd含量对变形Mg-Zn-Gd合金织构和室温成形性能的影响  

Influence of Gd Concentration on Texture and Stretch Formability of Rolled Mg-Zn-Gd Alloys at Room Temperature

作　　者：蔡正旭[1] 唐荻[1] 江海涛[1] 马昭[1] 

机构地区：[1]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2013年第10期2073-2078,共6页Rare Metal Materials and Engineering

基　　金：国家十二五镁合金支撑项目(2011BAE22B00)

摘　　要：研究了Gd元素对变形Mg-Zn-Gd合金织构和室温成形性能的影响。结果表明:Gd元素可以有效地控制轧制Mg-Zn-Gd合金的基面织构,当0.2%Gd元素加入Mg-1.5Zn合金中,热轧退火后合金的基面织构强度最大值仅为2.3,并且基面织构沿着TD方向发生明显分裂,埃里克森杯突值为7.0,TD方向上延伸率达到29.1%;随着合金中Gd含量的增加,Mg-1.5Zn-2.0Gd合金的基面织构强度最大值有所增加,基面织构沿着TD方向发生分裂的程度明显降低,埃里克森杯突值仅为3.9,并且合金中形成粗大的第二相,导致室温成形性能明显减低。The influence of Gd concentration on texture and stretch formability of rolled Mg-Zn-Gd alloys were investigated.The result shows that Gd addition in Mg-Zn alloys can effectively modify the basal plane texture.The alloy with 0.2％ Gd concentration appears to be low texture intensity,TD-split texture occurs when the position of basal is titled from ND toward TD,and the largest Erichsen value is 6.5 while the elongation rate reaches 29.1％ in TD direction.However with Gd concentration increasing,when the Gd concentration is 2.0％,the texture intensity increases slightly,TD-split texture degree decreases dramatically,and Erichsen value is only 3.9.Excessive Gd addition promotes formation of the coarse second phase particles,resulting in the deterioration of stretch formability.

关 键 词：镁合金 GD 织构 成形性能 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]