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<p>This work demonstrates a new technique for the easy fabrication of aluminum alloy foams from inexpensive alloy sheets instead of expensive powders. In this process, a clad-chip extrusion method is used to provide the precursor materials. Two A1050 aluminum alloy sheets are stacked with titanium hydride powder in between and are then roll-bonded at a 50% reduction ratio. The laminated sheets are subsequently cut into squares to produce clad-chips, from which a foamable precursor is obtained via extrusion. Another foamable precursor is produced for comparison. This precursor is produced from chips of the same size. The chips are cut from an as-received A1050 aluminum alloy sheet. Both precursors are used in foaming tests at 700&#xa0;°C in an electric furnace, after which the porosities of the aluminum alloy foams are ascertained. The clad-chip precursor expands during heating and provides a foam with a maximum mean porosity of 51%. In contrast, the as-received chip precursor expands minimally and provides a maximum mean porosity of just 20%. It is clear that aluminum alloy foams can be easily obtained from sheets using this clad chip extrusion precursor method.</p>

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Fabrication of Aluminum Alloy Foams from Sheets Using Clad-Chip Extrusion Technique

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Ryosuke Suzuki,
  • Keishi Fujiwara,
  • Kazuya Mita,
  • Yoshihiko Hangai,
  • Shinichi Nishida,
  • Yoshimasa Noda,
  • Shigeaki Kobayashi

摘要

This work demonstrates a new technique for the easy fabrication of aluminum alloy foams from inexpensive alloy sheets instead of expensive powders. In this process, a clad-chip extrusion method is used to provide the precursor materials. Two A1050 aluminum alloy sheets are stacked with titanium hydride powder in between and are then roll-bonded at a 50% reduction ratio. The laminated sheets are subsequently cut into squares to produce clad-chips, from which a foamable precursor is obtained via extrusion. Another foamable precursor is produced for comparison. This precursor is produced from chips of the same size. The chips are cut from an as-received A1050 aluminum alloy sheet. Both precursors are used in foaming tests at 700 °C in an electric furnace, after which the porosities of the aluminum alloy foams are ascertained. The clad-chip precursor expands during heating and provides a foam with a maximum mean porosity of 51%. In contrast, the as-received chip precursor expands minimally and provides a maximum mean porosity of just 20%. It is clear that aluminum alloy foams can be easily obtained from sheets using this clad chip extrusion precursor method.