Effect of Ti and Zr Composite Refiner on Microstructure and Tensile Properties of Pure Aluminum

Abstract:

This study investigated the influence of Ti and Zr grain refiner on the microstructure and tensile properties of pure aluminum. The results show that Ti and Zr composite refiner exhibit better grain-refining effect than that of Ti or Zr added alone, only adding 0.15%Ti and 0.15%Zr can positively refine the grain size and change the growth morphology from columnar grains to fine equiaxed ones. When composite adding 0.5%Ti and 0.3%Zr, the tensile strength of the alloy is increased from 43.5MPa of pure aluminum to 84.4 MPa and the average grain size is reduced to only about 62μm.

• Periodical: Advanced Materials Research (Volume 1056)
• Pages: 47-51
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1056.47
• Online since: October 2014
• Authors: Ai Wu Yu, Cheng Gang Yang*, Peng He, He Chen
• Keywords: Composite Refiner, Equiaxed Grain, Grain Size, Mechanical Property

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