Scholarlink

<p>This study investigates the effect of TiO₂ nanoparticle reinforcement based on volume ratio on the mechanical properties and microstructure of AA7075 aluminum alloy processed by friction stir processing (FSP). Samples with varying TiO₂ contents and blind hole spacings (5&#xa0;mm, 7.5&#xa0;mm, and 10&#xa0;mm) were analyzed. Results show that optimal TiO₂ dispersion, achieved at a 5-mm spacing (Sample T1), significantly enhances hardness (96.6 HV), ultimate tensile strength (506&#xa0;MPa), and ductility (9.7% elongation). Microstructural analysis reveals grain refinement and improved fracture toughness due to nanoparticle-induced crack growth suppression. However, higher TiO₂ concentrations lead to increased brittleness. The study highlights the importance of controlling nanoparticle distribution and process parameters to maximize mechanical performance, concluding that a balance between reinforcement concentration and dispersion is essential for optimizing the properties of AA7075-TiO₂ nanocomposites.</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

Evaluating the microstructural and mechanical properties of TiO2/AA7075 metal matrix nanocomposite via friction stir processing

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月26日

查看全文
  • Mahmoud E. Abdullah,
  • Moustafa M. Mohammed,
  • Fathy S. Ahmed,
  • Andrzej Kubit,
  • Hamed Aghajani Derazkola

摘要

This study investigates the effect of TiO₂ nanoparticle reinforcement based on volume ratio on the mechanical properties and microstructure of AA7075 aluminum alloy processed by friction stir processing (FSP). Samples with varying TiO₂ contents and blind hole spacings (5 mm, 7.5 mm, and 10 mm) were analyzed. Results show that optimal TiO₂ dispersion, achieved at a 5-mm spacing (Sample T1), significantly enhances hardness (96.6 HV), ultimate tensile strength (506 MPa), and ductility (9.7% elongation). Microstructural analysis reveals grain refinement and improved fracture toughness due to nanoparticle-induced crack growth suppression. However, higher TiO₂ concentrations lead to increased brittleness. The study highlights the importance of controlling nanoparticle distribution and process parameters to maximize mechanical performance, concluding that a balance between reinforcement concentration and dispersion is essential for optimizing the properties of AA7075-TiO₂ nanocomposites.