Rare Metals

, Volume 36, Issue 3, pp 188–192 | Cite as

Refining performance of Al–3Ti–0.2C–5Sr on A356 alloy and electron microanalysis of ternary Al–Ti–Sr phases

  • Hong-Liang Zhao
  • Chuan-Bin Zhang
  • Ya Gao
  • Qi-Yan Sun
Article
  • 173 Downloads

Abstract

The effect of Al–3Ti–0.2C–5Sr (wt%) grain refiner on the refining performance and modification of A356 alloy was investigated using optical microscope (OM). The morphology and crystal structure of ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the ternary Al–Ti–Sr phases in Al–3Ti–0.2C–5Sr refiner can promote the grain refining efficiency of A356 alloy. The ternary Al–Ti–Sr phases co-exist in two morphologies, i.e., blocky-like phase and surround-like phase, besides, which both have the same chemical composition of Al34Ti3Sr. The crystal structure of Al34Ti3Sr is face-centered cubic, and the lattice parameter is determined to be about 1.52 nm.

Keywords

Grain refiner Aluminum alloy Al–Ti–Sr phase Microscopic morphology Crystal structure 

Notes

Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. 51174177).

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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Hong-Liang Zhao
    • 1
  • Chuan-Bin Zhang
    • 2
  • Ya Gao
    • 1
  • Qi-Yan Sun
    • 1
  1. 1.College of Materials Science and EngineeringZhengzhou UniversityZhengzhouChina
  2. 2.Department of Mechanical and Electrical EngineeringXuchang Vocational Technical CollegeXuchangChina

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