Scholarlink

<p>This study investigates the thermo-mechanical indentation behavior of aluminum foam sandwich (AFS) structures with metallurgical bonding interfaces (MS). A cost-effective melt-stirring–hot-pressing–foaming route was employed to fabricate metallurgically bonded panels, in which Fe–Al intermetallic layers were formed at the face/core interface. Compared with single foam (SF) and simple stacked sandwiches (SS), the MS panels exhibit higher stiffness, superior deformation stability, and consistent energy absorption efficiency (~ 0.8) across a wide temperature range up to 400&#xa0;°C. The experimental results reveal that the metallurgical interface effectively enables uniform stress transfer and synchronized deformation between the faceplate and the foam core. This cooperative mechanism suppresses interfacial delamination and ensures structural integrity under local loading. Digital image correlation (DIC) analysis further demonstrates that the MS structure develops continuous strain bands through the core, indicating efficient load transfer pathways. Although the total absorbed energy of MS declines faster with temperature than that of SS, its structural integrity and energy utilization efficiency remain superior. These findings reveal the coupled effects of temperature and interfacial synergy on local deformation, providing practical guidance for designing lightweight sandwich structures for high-temperature protective 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

Thermo-mechanical indentation behavior of metallurgically bonded aluminum foam sandwich structures: interface synergy and stress transfer mechanism

  • 期刊论文

  • 发表日期：

    2026年3月18日

查看全文
  • Li Wang,
  • Hongjie Luo,
  • Shibo Cui,
  • Jianrong Xu,
  • Linli Wu

摘要

This study investigates the thermo-mechanical indentation behavior of aluminum foam sandwich (AFS) structures with metallurgical bonding interfaces (MS). A cost-effective melt-stirring–hot-pressing–foaming route was employed to fabricate metallurgically bonded panels, in which Fe–Al intermetallic layers were formed at the face/core interface. Compared with single foam (SF) and simple stacked sandwiches (SS), the MS panels exhibit higher stiffness, superior deformation stability, and consistent energy absorption efficiency (~ 0.8) across a wide temperature range up to 400 °C. The experimental results reveal that the metallurgical interface effectively enables uniform stress transfer and synchronized deformation between the faceplate and the foam core. This cooperative mechanism suppresses interfacial delamination and ensures structural integrity under local loading. Digital image correlation (DIC) analysis further demonstrates that the MS structure develops continuous strain bands through the core, indicating efficient load transfer pathways. Although the total absorbed energy of MS declines faster with temperature than that of SS, its structural integrity and energy utilization efficiency remain superior. These findings reveal the coupled effects of temperature and interfacial synergy on local deformation, providing practical guidance for designing lightweight sandwich structures for high-temperature protective applications.