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Alloying and Annealing Effects on Grain Boundary Character Evolution of Al-alloy 7075 Thin Films: An ACOM-TEM Analysis

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Characterization of Minerals, Metals, and Materials 2019

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

Abstract

Since polycrystalline materials consist of a complex network of various types of grain boundaries (GBs), a detailed study on the types of the GBs , their distribution and how they are connected is crucial to further enhance the material’s performance. Herein, the GB character distribution (types and connectivity) of as-deposited Al and Al-alloy 7075 thin films , as well as annealed Al-alloy thin films , was investigated using an advanced microscopic technique: ACOM-TEM . Annealing processes up to 12 h caused a decrease in the content ratio of random high-angle GBs (r-HAGBs) and triple junctions comprised of r-HAGBs. However, there was no significant consequence of alloying in the GB type and connectivity distribution. Furthermore, our results indicate that vacuum-deposited Al or Al-alloy thin films possess a strong <111> texture, and a characteristic GB distribution consisting of a significantly high fraction of low coincidence site lattice GBs (predominant ∑1 followed by ∑13b, ∑7, ∑21a, ∑31a and ∑19b in descending order) and a minor fraction of r-HAGBs.

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Acknowledgements

The authors are thankful to the Welch Foundation Grant (No. AX-1615) and Department of Defense Grant (No. 64756-RT-REP and 72489-RT-REP). RMC acknowledges the National Council for Science and Technology (Conacyt), Mexico, for the support provided through the Postdoctoral Scholarship Program.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA

    Prakash Parajuli, Rubén Mendoza-Cruz, Miguel José Yacamán & Arturo Ponce

Authors
  1. Prakash Parajuli
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  2. Rubén Mendoza-Cruz
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  3. Miguel José Yacamán
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  4. Arturo Ponce
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Corresponding author

Correspondence to Arturo Ponce .

Editor information

Editors and Affiliations

  1. Michigan Technological University, Houghton, MI, USA

    Bowen Li

  2. CanmetMATERIALS, Hamilton, ON, Canada

    Jian Li

  3. Al-Isra University, Amman, Jordan

    Shadia Ikhmayies

  4. ArcelorMittal Global R&D, East Chicago, IN, USA

    Mingming Zhang

  5. Middle East Technical University, Ankara, Turkey

    Yunus Eren Kalay

  6. Los Alamos National Laboratory, Los Alamos, NM, USA

    John S. Carpenter

  7. Michigan Technological University, Houghton, MI, USA

    Jiann-Yang Hwang

  8. Military Institute of Engineering, Rio de Janeiro, Brazil

    Sergio Neves Monteiro

  9. Chongqing University, Chongqing, China

    Chenguang Bai

  10. UNSW Canberra, Campbell, ACT, Australia

    Juan P. Escobedo-Diaz

  11. Free University of Bozen-Bolzano, Bolzano, Italy

    Pasquale Russo Spena

  12. Naval Research Laboratory, Washington, DC, USA

    Ramasis Goswami

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Parajuli, P., Mendoza-Cruz, R., Yacamán, M.J., Ponce, A. (2019). Alloying and Annealing Effects on Grain Boundary Character Evolution of Al-alloy 7075 Thin Films: An ACOM-TEM Analysis. In: Li, B., et al. Characterization of Minerals, Metals, and Materials 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05749-7_12

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