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The Correlation Between Structure and Performance of Advanced 2219 Aluminum Alloy

  • Ningning Jian
  • Lihua Chai
  • Zhilong Chang
  • Guodong Shi
  • He Li
  • Tounan Jin
  • Ziyong Chen
  • Haijing Wang
Conference paper

Abstract

This study aimed to explore the correlation among forging process, structure and mechanical performance of advanced 2219 aluminum alloy forged ring. The microstructure of the alloy forged ring in tangential, radial and axial were analyzed by Optical microscope (OM), Scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) test. The results show that the microstructure of 2219 aluminum alloy forged ring is a plate-like structure and the precipitation phases distributed along the rolling direction. Among which, fine Al2Cu particles uniformly distribute in the grain. The hardness and tensile performance of the forged ring in the tangential, radial and axial directions was tested. The results indicate that the hardness perpendicular to the axial plane is 153.7HV, and the tensile performance of the alloy along the tangential direction is the highest. By observing the microstructure of the fracture, it is founded that the dimple in the tangential is deeper and smaller, and the elongation in tangential are higher than those in the axial and radial. The UTS (ultimate tensile strength) of the forged ring is more than 400 MPa, and the YST (yield tensile strength) is more than 300 MPa. an elongation of more than 10% is obtained. No anisotropy is found on both the microstructure and mechanical performance. The results indicate that the 2219 aluminum alloy forged ring can be applied on the multi-directional bearing structure parts.

Keywords

2219 aluminum alloy Mechanical properties Microstructure Deformation 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Ningning Jian
    • 1
  • Lihua Chai
    • 1
  • Zhilong Chang
    • 2
  • Guodong Shi
    • 1
  • He Li
    • 1
  • Tounan Jin
    • 1
  • Ziyong Chen
    • 1
  • Haijing Wang
    • 1
  1. 1.School of Materials Science and EngineeringBeijing University of TechnologyBeijingChina
  2. 2.Beijing Engineering Research Institute of Aerospace SystemBeijingChina

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