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Effect of La Addition on Inclusions, Microstructures, and High-Temperature Mechanical Properties of As-Cast FeCrAl Alloys

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10th International Symposium on High-Temperature Metallurgical Processing

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The effects of La addition on the inclusions, microstructures, and high-temperature mechanical properties of as-cast FeCrAl alloys were investigated by using scanning electron microscope (SEM), energy disperse spectroscopy (EDS), and hot tensile tests. The characteristics of inclusions were examined, and further discussions focused on the analysis of thermodynamic calculations. The results showed that after La addition , AlN inclusions were likely to have cores of La-containing particles. Under the conditions of this study, La2O2S and La2O3 inclusions were the main La-containing precipitates and could act as the nucleus for the heterogeneous nucleation of δ-Fe to refine grains. The microstructure comparison of the two studied alloy ingots indicated that both the columnar and the equiaxed grains were refined after La addition . A series of tensile tests were carried out at temperatures from 973 to 1673 K under a constant strain rate of 1 × 10−3 s−1 to investigate the high-temperature mechanical properties . Both the tensile stress and the hot ductility were improved at the studied temperatures after La addition .

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Acknowledgements

The authors gratefully acknowledge the financial support of this research by the National Science Foundation of China (Grant No 51374023).

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Authors and Affiliations

  1. Institute of Engineering Technology, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Yang He & Jianhua Liu

  2. Department of Materials Science and Engineering, University of Toronto, Toronto, M5S 3E4, Canada

    Yang He, Yindong Yang & Alex McLean

Authors
  1. Yang He
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  2. Jianhua Liu
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  3. Yindong Yang
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  4. Alex McLean
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Corresponding author

Correspondence to Yang He .

Editor information

Editors and Affiliations

  1. Central South University, Changsha, China

    Tao Jiang

  2. Michigan Technological University, Houghton, MI, USA

    Jiann-Yang Hwang

  3. RHI Magnesita, Leoben, Austria

    Dean Gregurek

  4. Central South University, Changsha, China

    Zhiwei Peng

  5. Montana Tech, Butte, MT, USA

    Jerome P. Downey

  6. The University of Queensland, Brisbane, QLD, Australia

    Baojun Zhao

  7. Istanbul Technical University, Istanbul, Turkey

    Onuralp Yücel

  8. Atilim University, Ankara, Turkey

    Ender Keskinkilic

  9. University of Concepción, Concepción, Chile

    Rafael Padilla

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He, Y., Liu, J., Yang, Y., McLean, A. (2019). Effect of La Addition on Inclusions, Microstructures, and High-Temperature Mechanical Properties of As-Cast FeCrAl Alloys. In: Jiang, T., et al. 10th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05955-2_40

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