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    <title>Auteurs : Livan Fratini</title>
    <link>https://popups.uliege.be/esaform21/index.php?id=989</link>
    <description>Publications of Auteurs Livan Fratini</description>
    <language>fr</language>
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      <title>Understanding formability and geometrical accuracy of SPIF process used as Reshaping approach</title>
      <link>https://popups.uliege.be/esaform21/index.php?id=4315</link>
      <description>Putting in place Circular Economy strategies is an urgent action to be undertaken. Manufacturing processes play a relevant role as efficient material reuse enabler. Scientists have to make an effort either to find new process or to rethink old process to reprocess End-of-life (EoL) components to recover both material and functions. In this paper, Single Point Incremental Forming (SPIF) process is used for reshaping sheet metal EoL components. Deep drawing process as well as uniaxial pre-straining (to imitate the End-of-Life component) followed by SPIF operations (to obtain the reshaped components) are set- up and implemented to form and reform aluminum sheet metal components. As the authors have already proved the technical feasibility of such an approach, the present paper aims at a better understanding of the formability and geometrical accuracy performance of SPIF process as used to reform components. Specifically, an experimental campaign varying kind and extent of restraining is developed and the formability and geometrical accuracy of the subsequent SIPF operations is analyzed. Results proves that SPIF process is a promising approach for reshaping purpose.  </description>
      <pubDate>Thu, 01 Apr 2021 18:04:29 +0200</pubDate>
      <lastBuildDate>Thu, 01 Apr 2021 18:04:29 +0200</lastBuildDate>
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      <title>Friction Stir Welding of dissimilar aluminum-steel joints for the shipbuilding industry</title>
      <link>https://popups.uliege.be/esaform21/index.php?id=4008</link>
      <description>In recent years, the development of innovative joining methods has increased significantly due to the demands of several industries, such as the naval one, for lightweight structures. In fact, the safeguarding of the sea takes place through the reduction of climate-altering gas emissions, which is induced by energy savings. The latter can be achieved by the adoption of innovative technological solutions inherent to both the manufacturing processes and the increase in the use of light alloys. These solutions can reduce the environmental impact of vessels both in refitting operations and in new buildings. Although its potential in producing effective joints of different materials, the Friction Stir Welding process is still poorly used in the naval field due to difficulties in welding dissimilar joints of thick plates. In this paper, Friction Stir Welding was used to produce joints, in lap configuration, out of two very different, yet widely used in the naval sector, materials. This research work focuses on the engineering of the process, in terms of identification of welding parameters aimed at welding AA5083 H321 aluminum alloy and naval steel grade DH 36 plates with a thickness of 6mm. The results obtained indicate that sound joints can be obtained with a reasonably wide process parameters window when the aluminum plate is placed on top of the steel one. </description>
      <pubDate>Tue, 30 Mar 2021 09:58:47 +0200</pubDate>
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