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Understanding Microstructure and Mechanical Properties of Friction Stir Processed Aluminum-Bearing High-Chromium Ferritic Stainless Steel

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Mechanical and Creep Behavior of Advanced Materials

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

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Abstract

Kanthal APMT® steel (Fe–22Cr–5Al–3Mo) was developed mainly for using as high temperature furnace elements. This kind of high-Cr ferritic steels is not considered to have good weldability because of a variety of metallurgical issues. Friction stir welding (FSW), a solid state welding process, was applied to a Kanthal APMT® plate in a bead-on-plate configuration using a PcBN tool with a tool rotation rate of 600 RPM and a traverse speed of 25.4 mm/min. Microstructure and mechanical properties were evaluated to determine the weld quality and examine the feasibility of applying FSW as a joining technique for this steel. Microstructural characteristics were mainly studied by optical microscopy and transmission electron microscopy. The stir zone contained equiaxed grain structure with an average grain size of 13.7 μm. Interestingly, Vickers microhardness profile across the processed zone has revealed no significant change in microhardness.

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Acknowledgement

The material used in this work was procured by using funds from a project funded by the Nuclear Energy University Programs (NEUP). Also, Anumat Sittiho would like to acknowledge The Royal Thai Navy for providing him with a scholarship during his graduate studies at The University of Idaho.

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Authors and Affiliations

  1. Chemical and Materials Engineering, University of Idaho, Moscow, ID, USA

    Anumat Sittiho & Indrajit Charit

  2. Materials Science and Engineering, University of North Texas, Denton, TX, USA

    Vedavyas Tungala & Rajiv S. Mishra

Authors
  1. Anumat Sittiho
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  2. Vedavyas Tungala
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  3. Indrajit Charit
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  4. Rajiv S. Mishra
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Corresponding author

Correspondence to Anumat Sittiho .

Editor information

Editors and Affiliations

  1. Dept of Chemical and Matls Engrg, University of Idaho Dept of Chemical and Matls Engrg, Moscow, Idaho, USA

    Indrajit Charit

  2. North Carolina State University , Raleigh, North Carolina, USA

    Yuntian T. Zhu

  3. Los Alamos National Laboratory , Los Alamos, New Mexico, USA

    Stuart A. Maloy

  4. University of Tennessee at Knoxville , KNOXVILLE, Tennessee, USA

    Peter K. Liaw

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© 2017 The Minerals, Metals & Materials Society

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Sittiho, A., Tungala, V., Charit, I., Mishra, R.S. (2017). Understanding Microstructure and Mechanical Properties of Friction Stir Processed Aluminum-Bearing High-Chromium Ferritic Stainless Steel. In: Charit, I., Zhu, Y., Maloy, S., Liaw, P. (eds) Mechanical and Creep Behavior of Advanced Materials. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51097-2_21

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