Quick Search:       Advanced Search
王冬晓,王忠军,张涛,褚旭,王洪斌.AZ91-3Ca镁合金组织结构和电化学行为的研究[J].稀有金属材料与工程(英文),2018,47(9):2735~2742.[Wang Dongxiao,Wang Zhongjun,Zhang Tao,Chu Xu and Wang Hongbin.The Microstructure and Electrochemical Behavior of AZ91-3Ca Magnesium Alloy[J].Rare Metal Materials and Engineering,2018,47(9):2735~2742.]
The Microstructure and Electrochemical Behavior of AZ91-3Ca Magnesium Alloy
Download Pdf  View/Add Comment  Download reader
Received:October 10, 2016  Revised:April 13, 2017
DOI:
Key words: AZ91-3Ca  annealing  microstructure  phase  corrosion
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目);辽宁科技大学研究生教育改革与科技创新创业项目
Author NameAffiliation
Wang Dongxiao,Wang Zhongjun,Zhang Tao,Chu Xu and Wang Hongbin  
Hits: 13
Download times: 1
Abstract:
      The microstructure of as-cast AZ91-3Ca magnesium alloy before and after annealing treatment and the corrosion behavior under different annealing conditions were studied by scanning electron microscopy (SEM), X-ray diffractometer (XRD), electrochemical test and weight loss method. The results show that the as cast AZ91-3Ca alloy is mainly composed of matrix a -Mg phase and a network eutectic phase along the grain boundaries. The eutectic phase contains a -Mg phase, a solid block β-Mg17Al12 phase and a Mg (Al) 2Ca phase. The microstructures of the alloys annealed at 300 ℃ and 400 ℃ have no obvious change. After annealing at 500 ℃ for 2.0 h, the solution of β-Mg17Al12 phase promotes the precipitation of Mg, Al, Zn and Ca new phase. After annealing at 500 ℃ for 16.0 h, the content of Al in the matrix is the most, and the distribution is uniform and the corrosion resistance is the best, in NaCl aqueous solution the corrosion potential was -1330 mV, the current density was 1.222 × 10-4 A / cm2, and the corrosion rate was 0.11 mg / cm2h.