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Comparative Study on Mechanical Performances of Circular and Flat Geometry Welds in Friction Stir Welding of Aluminium Alloy

S.M. Senthil S. Ragu Nathan R. Parameshwaran M. Bhuvanesh Kumar
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 881-886 | DOI: 10.24425/amm.2021.136393
Słowa kluczowe FSW aluminium pipe aluminium plate tensile test hardness test
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Abstrakt

This study is to find the extent of variation in mechanical properties between plate and pipe welds fabricated out of the same FSW process parameters. Common thickness of 3 mm along with similar tool specifications is used to fabricate the weld. Process parameters of tool rotational speed 2000 rpm and weld speed 94 mm/min that was defined as optimal for pipe weld is used as common process parameters. Welds are analyzed for hardness and tensile properties. Yield strength and ultimate tensile strength varied about 8.1% and 11.2% respectively between plate and pipe welds. The hardness of the stir zones varied about 11.6% between plate and pipe welds.
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Bibliografia

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[8] S. Ragu Nathan, V. Balasubramanian, S. Malarvizhi, A.G. Rao, Def. Technol. 11 (3), 308-317 (2015). DOI: https://doi.org/10.1016/j.dt.2015.06.001
[9] A. Ismail, M. Awang, H. Fawad, K. Ahmad, in: Proceedings of the 7th Asia Pacific IIW International Congress, Singapore, 78-81 (2013).
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[11] M. Akbari, P. Asadi, Mater. Res. Express 6 (6), 066545 (2019). DOI: https://doi.org/10.1088/2053-1591/ab0d72
[12] S.M. Senthil, R. Parameshwaran, S. Ragu Nathan, M. Bhuvanesh Kumar, K. Deepandurai, Struct. Multidiscip. O. 62 (4), 1117-1133 (2020). DOI: https://doi.org/10.1007/s00158-020-02542-2
[13] S.M. Senthil, R. Parameshwaran, S.R. Nathan, S. Karthi, Russ. J. Nondestruct. 55 (12), 957-966 (2019). DOI: https://doi.org/10.1134/S1061830919120106
[14] I . Mumvenge, S.A. Akinlabi, P.M. Mashinini, O.S. Fatoba, J. Okeniyi, E.T. Akinlabi, in: IOP Conf. Ser- Mat. Sci., 012035 (2018). DOI: https://doi.org/10.1088/1757-899X/413/1/012035
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[16] J.S. Sashank, P. Sampath, P.S. Krishna, R. Sagar, S. Venukumar, S. Muthukumaran, Mater. Today-Proc, 5 (2), 8348-8353 (2018). DOI: https://doi.org/10.1016/j.matpr.2017.11.527
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Autorzy i Afiliacje

S.M. Senthil
1
ORCID: ORCID
S. Ragu Nathan
2
R. Parameshwaran
1
ORCID: ORCID
M. Bhuvanesh Kumar
3
  1. Kongu Engineering College, Erode, India
  2. Sree Vidyan Ikethan Engineering College, Tirupati, India
  3. National Institute of Technology, Tiruchirappalli, India

Microstructure Evolution, Phase Composition, Tensile and Hardness Properties Investigation of CrCuFeNi2Tix-Based High-Entropy Alloys

Long Chen
Archives of Metallurgy and Materials | 2023 | vol. 68 | No 3 | 881-886 | DOI: 10.24425/amm.2023.145451
Słowa kluczowe high entropy alloys phase composition microstructure tensile tests hardness test
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Abstrakt

CrCuFeNi2Tix high-entropy alloys (HEAs) (x = 0.1 ~ 0.7) are prepared and studied in this paper to investigate the effect of titanium on the microstructure, phase composition, and mechanical properties of the CrCuFeNi2Tix-based system. Microstructural studies using scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that the addition of titanium could induce the formation of a body-centered cubic lattice (BCC) and intermetallic compounds (Ni3Ti) of the CrCuFeNi2Tix-based system. The practical formation of the phases meet the theory of the atomic size difference δ, mixing enthalpy ΔHmix, mixing entropy ΔSmix, valence electron concentration (VEC), and electronegativity difference Δχ. Additionally, the tensile and hardness properties of the CrCuFeNi2Tix-based system are investigated in this study. Generally, CrCuFeNi2Tix HEAs show low stiffness and good flexibility in mechanical properties. When the x value is relatively small, the HEAs show good ductility in the tensile test, which is the result of a face-centered cubic lattice (FCC) in the phase composition at this stage; when the x value becomes larger, due to the formation of the intermetallic compounds Ni3Ti, the HEAs show high hardness
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Autorzy i Afiliacje

Long Chen
1 2
ORCID: ORCID
  1. Northwestern Polytechnical University, The School of Mechanical Engineering, Xi’an, China
  2. Shenzhen University, College of Electronics and Information Engineering, Shenzhen, China

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