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<p>The fabrication of multi-metallic materials, especially the combination of aluminum (Al) and copper (Cu), remains toward potential for applications requiring high performance with minimal weight. In this research, pluronic F-127 is used as a binder to build Al-Cu alloy via direct ink writing (DIW). In order to develop dense, load-bearing structures, the research intends to optimize rheological and post-processing parameters. The printability of different metallic inks with different solid volume fractions (30, 35, 40, and 45&#xa0;vol.%) was examined. In order to evaluate nine test conditions (TCs), including varying the sintering temperature (500-900&#xa0;°C), pressure (20-40&#xa0;bar), and sintering time (1-3&#xa0;h), a Taguchi experimental design was utilized. Mechanical and microstructural characterization was performed after the samples were printed and post-processed suitably. Rheology test depicts that the comparable viscosities, inks containing 35&#xa0;vol.% Al and 45&#xa0;vol.% Cu are appropriate for DIW. The maximum hardness value was obtained at TC9 (40&#xa0;bar, 900&#xa0;°C, 2&#xa0;h), which is 22.31% greater than 40% Cu in Al alloy. Sintering temperature and pressure had a greater impact on porosity reduction than sintering time, according to microstructural research. This study determines the efficiency of DIW for fabricating dense, high-strength Al-Cu multi-metallic components and offers helpful recommendations for enhancing additive manufacturing's (AM) material formulation and processing parameters.</p>

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Investigating the Influence of Sintering Parameters on Mechanical Properties of Multi-metallic Direct Ink Writing Parts

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • A. Anbarasan,
  • K. Kanthavel

摘要

The fabrication of multi-metallic materials, especially the combination of aluminum (Al) and copper (Cu), remains toward potential for applications requiring high performance with minimal weight. In this research, pluronic F-127 is used as a binder to build Al-Cu alloy via direct ink writing (DIW). In order to develop dense, load-bearing structures, the research intends to optimize rheological and post-processing parameters. The printability of different metallic inks with different solid volume fractions (30, 35, 40, and 45 vol.%) was examined. In order to evaluate nine test conditions (TCs), including varying the sintering temperature (500-900 °C), pressure (20-40 bar), and sintering time (1-3 h), a Taguchi experimental design was utilized. Mechanical and microstructural characterization was performed after the samples were printed and post-processed suitably. Rheology test depicts that the comparable viscosities, inks containing 35 vol.% Al and 45 vol.% Cu are appropriate for DIW. The maximum hardness value was obtained at TC9 (40 bar, 900 °C, 2 h), which is 22.31% greater than 40% Cu in Al alloy. Sintering temperature and pressure had a greater impact on porosity reduction than sintering time, according to microstructural research. This study determines the efficiency of DIW for fabricating dense, high-strength Al-Cu multi-metallic components and offers helpful recommendations for enhancing additive manufacturing's (AM) material formulation and processing parameters.