Scholarlink

<p>Metal matrix composites (MMCs) are increasingly employed in engineering applications owing to their superior mechanical performance compared to monolithic alloys. Aluminium combination reinforced composites are familiar for their lightweight and high- strength material applications. This experimental study investigates AA7075-T6 composites reinforced with cenosphere and low- carbon steel powders fabricated through stir casting process. Four specimens were fabricated: unreinforced AA7075-T6, AA7075-T6 reinforced with 2 wt% cenospheres, AA7075-T6 reinforced with 2 wt% low-carbon steel powder, and a hybrid composite containing 2 wt% cenosphere and 2 wt% low-carbon steel powder. Experimental work is carried out following the ASTM standards for tensile, impact and Brinell hardness in accordance with ASTM E8, ASTM E23 and ASTM E10 respectively. The Aluminium Metal Matrix Composite (AMMC) exhibited significant improvements in tensile strength (46.2%), yield strength of 55.8%, impact strength of 46.2% and hardness of 8.2% compared to the base alloy. These enhancements are attributed to the effective load transfer, grain refinement, Orowan strengthening and dislocation strengthening mechanisms. These results showed that the reinforcement of Aluminium 7075-T6 with cenosphere and low-carbon steel powder improved the mechanical performance indicating its suitability for high-strength and lightweight in aerospace and automotive applications.</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

Mechanical Charaterization of AA7075-T6-Cenosphere–Low Carbon Steel Powder Metal Matrix Composites Fabricated by Stir Casting Process

  • 期刊论文

  • 发表日期：

    2026年7月25日

查看全文
  • Sumalatha Mahankali,
  • Jamuna Rani Ganipineni,
  • Bala Chennaiah Mallapuram,
  • Kamala Priya B.

摘要

Metal matrix composites (MMCs) are increasingly employed in engineering applications owing to their superior mechanical performance compared to monolithic alloys. Aluminium combination reinforced composites are familiar for their lightweight and high- strength material applications. This experimental study investigates AA7075-T6 composites reinforced with cenosphere and low- carbon steel powders fabricated through stir casting process. Four specimens were fabricated: unreinforced AA7075-T6, AA7075-T6 reinforced with 2 wt% cenospheres, AA7075-T6 reinforced with 2 wt% low-carbon steel powder, and a hybrid composite containing 2 wt% cenosphere and 2 wt% low-carbon steel powder. Experimental work is carried out following the ASTM standards for tensile, impact and Brinell hardness in accordance with ASTM E8, ASTM E23 and ASTM E10 respectively. The Aluminium Metal Matrix Composite (AMMC) exhibited significant improvements in tensile strength (46.2%), yield strength of 55.8%, impact strength of 46.2% and hardness of 8.2% compared to the base alloy. These enhancements are attributed to the effective load transfer, grain refinement, Orowan strengthening and dislocation strengthening mechanisms. These results showed that the reinforcement of Aluminium 7075-T6 with cenosphere and low-carbon steel powder improved the mechanical performance indicating its suitability for high-strength and lightweight in aerospace and automotive applications.