Scholarlink

<p>Developing high-performance titanium/steel composite plates requires resolving the challenge of suppressing brittle intermetallic compounds (IMCs) and restoring the ductility of the matrix. In this study, 316H/TC4 composite plates were fabricated via asynchronous vacuum hot rolling (AVHR). The effects of annealing temperature (550–700&#xa0;°C) on interfacial stability, elemental diffusion, and mechanical properties were systematically investigated. The results indicate that although the AVHR process ensures strong metallurgical bonding through vacuum heating and severe shear deformation, it also leads to the accumulation of high deformation stored energy. Subsequent annealing resulted in significant asymmetric microstructural evolution on both sides of the interface: The TC4 side exhibited temperature-sensitive recrystallization behavior, effectively released residual stress, whereas the 316H side retained a predominantly recovered microstructure. A critical kinetic threshold was determined at 600&#xa0;°C. Within this temperature range, atomic diffusion was kinetically limited, which effectively suppresses the nucleation and growth of harmful brittle phases (such as FeTi, Fe<sub>2</sub>Ti, and σ phase) and substantially restored the plastic properties of the matrix. When the temperature was higher than 600&#xa0;°C, the interfacial reaction was significantly enhanced, leading to rapid thickening of the IMCs layer and the formation of diffusion pores and cracks, thereby inducing premature failure. The composite annealed at 600&#xa0;°C exhibited superior comprehensive properties, with shear strength, tensile strength, and elongation reaching 233.35&#xa0;MPa, 771.95&#xa0;MPa, and 16.6%, respectively.</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

Effect of annealing temperature on interfacial microstructure evolution and mechanical properties of 316H/TC4 composite plates fabricated via asynchronous vacuum hot rolling

  • 期刊论文

  • 发表日期：

    2026年4月17日

查看全文
  • Shiyi Zhang,
  • Lifeng Ma,
  • Zhihui Cai,
  • Quan Li,
  • Xiping Zhang,
  • Junyi Lei,
  • Chenchen Zhi,
  • Qisheng Zhang

摘要

Developing high-performance titanium/steel composite plates requires resolving the challenge of suppressing brittle intermetallic compounds (IMCs) and restoring the ductility of the matrix. In this study, 316H/TC4 composite plates were fabricated via asynchronous vacuum hot rolling (AVHR). The effects of annealing temperature (550–700 °C) on interfacial stability, elemental diffusion, and mechanical properties were systematically investigated. The results indicate that although the AVHR process ensures strong metallurgical bonding through vacuum heating and severe shear deformation, it also leads to the accumulation of high deformation stored energy. Subsequent annealing resulted in significant asymmetric microstructural evolution on both sides of the interface: The TC4 side exhibited temperature-sensitive recrystallization behavior, effectively released residual stress, whereas the 316H side retained a predominantly recovered microstructure. A critical kinetic threshold was determined at 600 °C. Within this temperature range, atomic diffusion was kinetically limited, which effectively suppresses the nucleation and growth of harmful brittle phases (such as FeTi, Fe2Ti, and σ phase) and substantially restored the plastic properties of the matrix. When the temperature was higher than 600 °C, the interfacial reaction was significantly enhanced, leading to rapid thickening of the IMCs layer and the formation of diffusion pores and cracks, thereby inducing premature failure. The composite annealed at 600 °C exhibited superior comprehensive properties, with shear strength, tensile strength, and elongation reaching 233.35 MPa, 771.95 MPa, and 16.6%, respectively.