1. 毕业设计（论文）的内容和要求

镁合金具有密度小（1.8g/cm3镁合金左右），比强度高，比弹性模量大，散热好，消震性好，承受冲击载荷能力比铝合金大，耐有机物和碱的腐蚀性能好的特点。

主要合金元素有铝、锌、锰、铈、钍以及少量锆或镉等。

az91d合金是铸造镁铝锌合金，它的强度高且耐蚀性相对较好，主要用于电器产品的壳体、小尺寸薄型或异型支架等。

2. 参考文献

1. He K, Zhao J, Li P, et al. Investigation on microstructures and properties of arc-sprayed-Al/AZ91D bimetallic material by solid#8211;liquid compound casting[J]. Materials amp; Design, 2016, 112:553-564. 2. Tahmasebifar A, Kayhan S M, Evis Z, et al. Mechanical, electrochemical and biocompatibility evaluation of AZ91D magnesium alloy as a biomaterial[J]. Journal of Alloys amp; Compounds, 2016, 687:906-919. 3. Zhang D, Wei B, Wu Z, et al. A comparative study on the corrosion behaviour of Al, Ti, Zr and Hf metallic coatings deposited on AZ91D magnesium alloys[J]. Surface amp; Coatings Technology, 2016, 303:94-102. 4. Sun H, Ma S. Microstructural characteristics and protection performances of plasma-sprayed Al2O3#8211;Al composite coatings on AZ91D magnesium alloy[J]. Science amp; Engineering of Composite Materials, 2016, 23(5):467-474. 5. Li X, Xiong S M, Guo Z. Failure behavior of high pressure die casting AZ91D magnesium alloy[J]. Materials Science amp; Engineering A, 2016, 672:216-225. 6. Yao X, Xie P, Sun Y, et al. Properties of AZ91D Composite Ceramic Coatings Formed with Adding Al_2O_3 Colloid in MAO Electrolyte[J]. Rare Metal Materials amp; Engineering, 2016, 45(8):2092-2097. 7. Xu Y, Hu L, Jia J, et al. Microstructure evolution of a SIMA processed AZ91D magnesium alloy based on repetitive upsetting-extrusion (RUE) process[J]. Materials Characterization, 2016, 118:309-323. 8. 郭惠霞, 马颖, 王劲松,等. AZ91D镁合金微弧氧化膜在不同浓度NaCl溶液中的腐蚀行为[J]. 中国有色金属学报(英文版), 2012, 22(7):1786-1793. 9. 李玉兰, 刘江, 彭晓东. 镁合金压铸件在汽车上的应用[J]. 特种铸造及有色合金, 1999(S1):124-126. 10. 虞炳西, 张绥生, 万晓景. Ti-6Al-4V合金的热盐应力腐蚀[J]. 金属学报, 1982(3):264-271.

3. 毕业设计（论文）进程安排