Volume 35 Issue 5
Oct.  2020
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ZHAO Yansen, WANG Pengyun, ZHANG Haiyang, WANG Yue, GAO Lingqing. Analysis on the Crack Formation in Aluminum Alloy Casting[J]. Development and Application of Materials, 2020, 35(5): 40-44.
Citation: ZHAO Yansen, WANG Pengyun, ZHANG Haiyang, WANG Yue, GAO Lingqing. Analysis on the Crack Formation in Aluminum Alloy Casting[J]. Development and Application of Materials, 2020, 35(5): 40-44.
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Analysis on the Crack Formation in Aluminum Alloy Casting

  • 1. Military Representatives Office of the Navy, Zhengzhou 450015, China;

  • 2. Luoyang Ship Material Research Institute, Luoyang 471023, China;

  • 3. 713 Research Institute of China Shipbuilding Industry Corporation, Zhengzhou 450015, China

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  • Received Date: July 28, 2020
  • Available Online: March 13, 2024
    Graphical Abstract
    • Abstract
  • In order to find out the causes for local cracking in ZL305 aluminum alloy casting after many years of service, optical microscope, scanning electron microscope and chemical analysis were used to analyze the cracking position. It is found out that the cracking of the casting belongs to stress corrosion cracking. The reason is that the magnesium content in the alloy exceeds the upper limit of the standard, and β phase precipitates gradually at the grain boundary and takes on chain shape during the service, which reduces the corrosion resistance of the grain boundary. In addition, the alloy bears large stress in the marine environment for a long time, resulting in stress corrosion and cracking.
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