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Enhancing the Impact Toughness of ADC12 Aluminum Alloy by Alloying with Y and Solution Treatment

  • Zhenghua Huang
  • Yi Yao
  • Wenjun Qi
  • Chunjie Xu
  • Zhongming Zhang
  • Yangde Li
  • Weirong Li
Conference paper

Abstract

Microstructures and phase compositions of as-cast and solution-treated ADC12 and ADC12-0.85Y alloys were studied by optical microscope, scanning electron microscopy and X-ray diffraction method. Meanwhile, the impact toughness was tested. The results showed that as-cast microstructure was refined significantly when 0.85%Y was added into ADC12 alloy. The coarse primary α-Al dendrite changed into fine cellular and equixed grains, and the Si-rich phase changed from long needle or plate to short rod or globosity. Meanwhile, few acicular new phase Al3Y precipitated. When the two alloys were solution-treated at 793 K for 8 h, the phase compositions did not change and the partial second phases dissolved into α-Al matrix. However, the long needle or plate Si-rich phase disappeared completely, and the remaining second phases precipitated by short rod or globosity. Meanwhile, the segregation degree between dendrites decreased. When 0.85%Y was added, the impact toughness value increased from 3.8 J/cm2 for as-cast ADC12 alloy to 10.8 J/cm2, and further reached 21.9 J/cm2 after the solution treatment, with the amplitude of 476% compared with the corresponding as-cast value of ADC12 alloy. The impact fracture exhibited the typical ductile fracture with dimples.

Keywords

ADC12 alloy Y modification Microstructure Impact toughness 

Notes

Acknowledgements

This work was supported by the Project on the Integration of Industry, Education and Research of Guangdong Province (2014B090903016), Guangdong and Hong Kong Generic Technology Bidding Project (2013B010138001), International Science and Technology Cooperation Project of Guangdong Province (2014A050503002), and Research Platform Environment and Capacity Construction Project of Guangdong Academy of Sciences (2016GDASPT-0320).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Zhenghua Huang
    • 1
  • Yi Yao
    • 1
    • 2
  • Wenjun Qi
    • 1
  • Chunjie Xu
    • 2
  • Zhongming Zhang
    • 2
  • Yangde Li
    • 3
  • Weirong Li
    • 3
  1. 1.Guangdong Provincial Key Laboratory for Technology and Application of Metal TougheningGuangdong Institute of Materials and ProcessingGuangzhouChina
  2. 2.School of Materials Science and EngineeringXi’an University of TechnologyXi’anChina
  3. 3.DongGuan EONTEC Co. Ltd.DongguanChina

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