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<p>Lightweight, high-strength, and heat-resistant protective structures have consistently been crucial for applications in extreme environments, such as aerospace, semiconductors, and nuclear power industries. Multilayered TC4/TB8 titanium (Ti) laminates, inspired by the heterostructures of natural biological shells, were fabricated using a hybrid diffusion bonding-hot rolling process followed by an aging treatment, resulting in an architected microstructure. The laminate achieves an ultra-high yield stress of 1020&#xa0;MPa and proper uniform elongation of 4.2% at 500&#xa0;°C. The TB8 layers with high-density nano-precipitates and dislocations act as hard zone, contributing to high strength. The TC4 layers, with their bimodal structure consisting of coarse and fine grains characterized by equiaxed and lamellar structures, experience more plastic strain than the TB8 layers. The hetero deformation associated with the detwinning of α grains in the TC4 layer induces toughening at high temperatures.</p> Graphical abstract <p></p>

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Architecting heterostructures in multilayered titanium laminates to attain 1 GPa yield stress with uncompromised ductility at 500 °C

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月21日

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  • Tian-Le Li,
  • Ning Xu,
  • Ren-Hao Wu,
  • Jia-Bao Liu,
  • Man Jae SaGong,
  • Shi Woo Lee,
  • Yun-Tian Zhu,
  • Hyoung Seop Kim

摘要

Lightweight, high-strength, and heat-resistant protective structures have consistently been crucial for applications in extreme environments, such as aerospace, semiconductors, and nuclear power industries. Multilayered TC4/TB8 titanium (Ti) laminates, inspired by the heterostructures of natural biological shells, were fabricated using a hybrid diffusion bonding-hot rolling process followed by an aging treatment, resulting in an architected microstructure. The laminate achieves an ultra-high yield stress of 1020 MPa and proper uniform elongation of 4.2% at 500 °C. The TB8 layers with high-density nano-precipitates and dislocations act as hard zone, contributing to high strength. The TC4 layers, with their bimodal structure consisting of coarse and fine grains characterized by equiaxed and lamellar structures, experience more plastic strain than the TB8 layers. The hetero deformation associated with the detwinning of α grains in the TC4 layer induces toughening at high temperatures.

Graphical abstract