脉冲磁场下制备的AZ91D-3Ca合金的半固态压缩力学行为  

Mechanical Behavior of AZ91D-3Ca Magnesium Alloy Prepared by Pulsed Magnetic Field during Semi-solid Compression

作　　者：周全[1] 涂序荣[1] 陈乐平[1] 

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2010年第2期131-133,共3页Special Casting & Nonferrous Alloys

基　　金：江西省教育厅资助项目(GJJ08208);江西省自然科学基金资助项目(2008GQC0035)

摘　　要：利用Gleeble-1500热模拟机对脉冲磁场下制备的AZ91D-3Ca镁合金的半固态压缩力学行为进行了研究,考察了变形温度和变形速率对半固态压缩流变应力的影响。结果表明,与常规铸造的镁合金试样相比,脉冲磁场下制备的镁合金试样在400℃的高温压缩时并无优势,而在510℃的半固态压缩时具有较低的变形抗力;当其他条件相同时,随着变形温度的升高或变形速率的降低,合金的变形抗力逐渐减小;当应变速率为0.005～0.500s-1和变形温度为510～520℃时,合金的变形抗力在0.38～1.60MPa范围内。Mechanical behavior of AZ91D-3Ca magnesium alloy prepared by pulsed magnetic field during semi-solid compression was investigated with help of the Gleeble-1500 hot simulator to understand effects of deformation temperature and strain rate on semi-solid compressive stress. The results reveal that, compared with that prepared by conventional casting, compressive behavior of magnesium alloy prepared by pulsed magnetic field is similar during compressive deformation at 400℃, however, lower deformation resistance can be observed at semi-solid temperature (510℃). When other conditions keep the same, with the increase of deformation temperature or the decrease of strain rate, deformation resistance of the alloy is decreased. Deformation resistance makes in range of 0.38~1.6 MPa with 0.005~0.5 s-1 and 510~520 ℃ deformation temperature.

关 键 词：脉冲磁场 AZ91D-3Ca镁合金 压缩变形 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG249.2[金属学及工艺—金属材料]