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Microstructural and Mechanical Properties of Friction Stir Welded Nickel-Aluminum Bronze (NAB) Alloy

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Abstract

In this study, the applicability of friction stir welding to cast NAB alloy (i.e., C95800) with a thickness of 9 mm has been investigated. The joint performance was determined by conducting optical microscopy, microhardness measurements, and mechanical testing (e.g., tensile and Charpy impact tests). The effect of stir intensity on joint performance was also determined. A grain refinement (equiaxed fine grain structure) as well as evolution of a Widmanstätten structure was achieved within the stir zone of all the joints produced. Thus, all of the joints produced exhibited higher proof stress (i.e., between 512 and 616 MPa) than that of the base material, i.e., 397 MPa. On the other hand, only half of the specimens exhibited higher tensile strength values than that of the base plate (i.e., 794 MPa), whereas the other specimens displayed lower tensile strength than the base plate due to the existence of weld defects, namely cold bonding and/or tunnel defect.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Karadeniz Technical University, Trabzon, Turkey

    T. Küçükömeroğlu, E. Şentürk & L. Kara

  2. Department of Mechanical Engineering, Iskenderun Technical University, Iskenderun, Hatay, Turkey

    G. İpekoğlu & G. Çam

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  1. T. Küçükömeroğlu
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  2. E. Şentürk
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  3. L. Kara
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  4. G. İpekoğlu
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  5. G. Çam
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Correspondence to G. Çam.

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Küçükömeroğlu, T., Şentürk, E., Kara, L. et al. Microstructural and Mechanical Properties of Friction Stir Welded Nickel-Aluminum Bronze (NAB) Alloy. J. of Materi Eng and Perform 25, 320–326 (2016). https://doi.org/10.1007/s11665-015-1838-x

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  • DOI: https://doi.org/10.1007/s11665-015-1838-x

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