Scholarlink

<p>This study examines the quasi-static compressive behavior of aluminum cellular-core sandwich panels produced via a hybrid additive manufacturing investment casting route. AlSi7 and AlSi12 alloys were compared across four nominal porosity levels (70%, 75%, 80%, and 85%) using geometrically identical periodic cellular architectures. Manufactured panels showed high geometric fidelity, with measured void diameters closely matching the CAD-designed values. SEM/EDS analysis revealed alloy-dependent microstructural differences: AlSi12 contained a higher fraction of Si-rich eutectic phases and Fe-containing intermetallics, whereas AlSi7 exhibited a more homogeneous <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>-Al matrix. Under uniaxial compression, both alloys displayed the characteristic cellular metal response: elastic loading, first collapse, plateau deformation, and densification. First collapse stress decreased with increasing porosity in both alloys. AlSi12 consistently achieved higher first collapse stresses than AlSi7 at equivalent porosity levels; at 70% porosity, AlSi12 reached 50.0&#xa0;±&#xa0;4.8&#xa0;MPa versus 39.8&#xa0;±&#xa0;3.6&#xa0;MPa for AlSi7, while at 85% porosity, the values were 12.6&#xa0;±&#xa0;2.5&#xa0;MPa and 5.5&#xa0;±&#xa0;0.8&#xa0;MPa, respectively. These results show that the compressive response is governed by the combined effect of relative density, ligament geometry, and alloy composition, and demonstrate the potential of the hybrid manufacturing route for producing lightweight aluminum sandwich structures for load-bearing applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Compressive Behavior of Aluminum Cellular-Core Sandwich Structures Produced via a Hybrid Additive Manufacturing–Investment Casting Route

  • 期刊论文

  • 发表日期：

    2026年7月27日

查看全文
  • Andres Giovanni González-Hernández,
  • Santiago Esteban Ortíz-Camacho,
  • Andres Felipe Garcia-Ramirez

摘要

This study examines the quasi-static compressive behavior of aluminum cellular-core sandwich panels produced via a hybrid additive manufacturing investment casting route. AlSi7 and AlSi12 alloys were compared across four nominal porosity levels (70%, 75%, 80%, and 85%) using geometrically identical periodic cellular architectures. Manufactured panels showed high geometric fidelity, with measured void diameters closely matching the CAD-designed values. SEM/EDS analysis revealed alloy-dependent microstructural differences: AlSi12 contained a higher fraction of Si-rich eutectic phases and Fe-containing intermetallics, whereas AlSi7 exhibited a more homogeneous \(\alpha \) α -Al matrix. Under uniaxial compression, both alloys displayed the characteristic cellular metal response: elastic loading, first collapse, plateau deformation, and densification. First collapse stress decreased with increasing porosity in both alloys. AlSi12 consistently achieved higher first collapse stresses than AlSi7 at equivalent porosity levels; at 70% porosity, AlSi12 reached 50.0 ± 4.8 MPa versus 39.8 ± 3.6 MPa for AlSi7, while at 85% porosity, the values were 12.6 ± 2.5 MPa and 5.5 ± 0.8 MPa, respectively. These results show that the compressive response is governed by the combined effect of relative density, ligament geometry, and alloy composition, and demonstrate the potential of the hybrid manufacturing route for producing lightweight aluminum sandwich structures for load-bearing applications.