摘要
镁铝复合板是一种节能降耗的新型材料,研究其成形性能对于推广其工业应用具有重要意义。通过刚模胀形实验获得了5052/AZ31/5052镁铝复合板在170和230℃时的成形极限曲线,分析了胀形试样破裂处的断口形貌及胀形过程界面扩散行为。结果表明:镁铝复合板在230℃下具有较好的成形性能;胀形过程能促使界面附近镁铝元素分布均匀化,对扩散层的厚度影响不大,同时可以消除缺陷、增加机械咬合面积,有利于提高界面的结合强度。
5052/AZ31/5052 tri-layer clad sheet is a new material with energy saving and consumption reduction. Its formability is of vital significance to promote its industrial applications. The forming limit curves of 5052Al/AZ31Mg/5052 Al tri-layer clad sheet at 170 ℃ and 230 ℃ were obtained by a hemispherical punch. Fracture morphology at limit position and the interface diffusion behavior during the bulging process were studied. The results show that the 5052Al/AZ31Mg/5052 Al tri-layer clad sheet has a superior formability at 230 ℃; the bulging process promotes the homogeneity of magnesium and aluminum elements distribution near the bond interface but has little effect on the thickness of the diffusion layer; meanwhile, the defects are eliminated and the mechanical occlusion areas of bond interface are increased by the bulging process, which is beneficial to enhance the bond strength of the interface.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第8期2086-2091,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51175363
51274149)
关键词
镁铝复合板
成形极限曲线
断口
界面
扩散
Mg-Al clad sheet
forming limit curve
fracture
bond interface
diffusion
