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<p>The objective of this research work is to evaluate the impact of cryorolling on the microstructure and mechanical properties of friction stir processed AA8011–B<sub>4</sub>C aluminum matrix composite. The study observed that cryorolling significantly reduced grain size, from 8.5&#xa0;µm in the FSP condition to 5.3&#xa0;µm after cryorolling (~ 38% reduction). Scanning Electron Microscopy (SEM) revealed the conversion of coarse, agglomerated precipitates into fine, evenly distributed particles, whereas X-ray diffraction analysis showed retention of the same phase with higher lattice strain. In terms of mechanical properties, there was a marked improvement in hardness (from 91 to 99 HV), yield strength (from 283 to 341&#xa0;MPa), ultimate tensile strength (from 331 to 389&#xa0;MPa), and elongation (from 25.9 to 32.1%).</p>

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Integrated Friction Stir Processing and Cryorolling for Superior Mechanical Characteristics in AA8011–B4C Aluminum Matrix Composites

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Namburi Harsha,
  • Padmavathi Pragada,
  • Kishore Kumar Kandi,
  • P. Prakash,
  • Yadluri Ravi Kishore,
  • S. Sarveswara Reddy,
  • K. Rajesh

摘要

The objective of this research work is to evaluate the impact of cryorolling on the microstructure and mechanical properties of friction stir processed AA8011–B4C aluminum matrix composite. The study observed that cryorolling significantly reduced grain size, from 8.5 µm in the FSP condition to 5.3 µm after cryorolling (~ 38% reduction). Scanning Electron Microscopy (SEM) revealed the conversion of coarse, agglomerated precipitates into fine, evenly distributed particles, whereas X-ray diffraction analysis showed retention of the same phase with higher lattice strain. In terms of mechanical properties, there was a marked improvement in hardness (from 91 to 99 HV), yield strength (from 283 to 341 MPa), ultimate tensile strength (from 331 to 389 MPa), and elongation (from 25.9 to 32.1%).