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<p>Nanocrystalline W-Fe-Ti solid solution with a crystallite size of 7&#xa0;nm was synthesized via mechanical alloying and used to prepare Al-10 wt.% (W-Fe-Ti) composite using the melt casting route. The cast composites were subsequently cold pressed at 20&#xa0;kg/cm<sup>2</sup> and annealed at 573&#xa0;K for homogenization and removal of residual porosity. Upon annealing, the Al-10(W-Fe-Ti) system exhibited the formation of several intermetallic compounds such as Al<sub>12</sub>W, Al<sub>3</sub>Ti, and Al<sub>13</sub>Fe<sub>4</sub>. For comparison purpose, Al with 10 wt.% of unmilled tungsten, i.e., Al-10W was processed under identical conditions. Unlike Al-10(W-Fe-Ti), the Al-10W system formed Al<sub>5</sub>W intermetallics uniformly dispersed within the matrix. Microhardness values of the Al-10W and Al-10(W-Fe-Ti) were observed to be 64 and 73 VHN, representing 77% and 102% improvements over Al (36 VHN). The bending yield strength of Al-10W and Al-10(W-Fe-Ti) composite was found to be 231 and 206&#xa0;MPa, respectively, which is 192 and 160% better than that of Al. The strain to failure of the Al-10(W-Fe-Ti) system was observed to be 8.86% which is higher than the strain to failure of the Al-10W system at 5.16% but lower than that of Al at 9.24%. Electrical conductivity of both the composites was measured and found to be lower than that of Al.</p>

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Processing and Characterization of Al Metal Matrix Composites with W-Fe-Ti-Based Reinforcements

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Ipsita Madhumita Das,
  • Animesh Mandal,
  • Srikant Gollapudi

摘要

Nanocrystalline W-Fe-Ti solid solution with a crystallite size of 7 nm was synthesized via mechanical alloying and used to prepare Al-10 wt.% (W-Fe-Ti) composite using the melt casting route. The cast composites were subsequently cold pressed at 20 kg/cm2 and annealed at 573 K for homogenization and removal of residual porosity. Upon annealing, the Al-10(W-Fe-Ti) system exhibited the formation of several intermetallic compounds such as Al12W, Al3Ti, and Al13Fe4. For comparison purpose, Al with 10 wt.% of unmilled tungsten, i.e., Al-10W was processed under identical conditions. Unlike Al-10(W-Fe-Ti), the Al-10W system formed Al5W intermetallics uniformly dispersed within the matrix. Microhardness values of the Al-10W and Al-10(W-Fe-Ti) were observed to be 64 and 73 VHN, representing 77% and 102% improvements over Al (36 VHN). The bending yield strength of Al-10W and Al-10(W-Fe-Ti) composite was found to be 231 and 206 MPa, respectively, which is 192 and 160% better than that of Al. The strain to failure of the Al-10(W-Fe-Ti) system was observed to be 8.86% which is higher than the strain to failure of the Al-10W system at 5.16% but lower than that of Al at 9.24%. Electrical conductivity of both the composites was measured and found to be lower than that of Al.