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<p>This study investigates the effects of sandblasting (SB) and laser texturing (LT) on the surface roughness, coating morphology, and wear performance of Al-7075 alloy reinforced with 4% µB<sub>4</sub>C, 4% GNP, and a dual combination of 2% µB<sub>4</sub>C + 2% GNP. Surface roughness analysis showed significant differences between SB and LT samples, with SB samples exhibiting higher roughness. SB Al-4%µB<sub>4</sub>C demonstrated the highest roughness, enhancing mechanical interlocking and coating adhesion. Wear tests conducted at 300&#xa0;°C revealed the SB Al-4%Dual composition achieved the lowest coefficient of friction and wear volume loss. The wear volume loss increased in the order of Al-4%Dual &lt; Al-4%µB<sub>4</sub>C &lt; Al-4%GNP for both SB and LT specimens, highlighting the superior wear resistance of the dual reinforcement.</p> Graphical Abstract <p></p>

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Impact of Sandblasting and Laser Texturing on Microstructure and Elevated Temperature Tribological Behavior of Cold-Sprayed μB4C and Graphene Nanoplatelet-Reinforced AA7075

  • 期刊论文

  • 发表日期：

    2025年1月13日

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  • Achyuth Kulkarni,
  • Troy Y. Ansell

摘要

This study investigates the effects of sandblasting (SB) and laser texturing (LT) on the surface roughness, coating morphology, and wear performance of Al-7075 alloy reinforced with 4% µB4C, 4% GNP, and a dual combination of 2% µB4C + 2% GNP. Surface roughness analysis showed significant differences between SB and LT samples, with SB samples exhibiting higher roughness. SB Al-4%µB4C demonstrated the highest roughness, enhancing mechanical interlocking and coating adhesion. Wear tests conducted at 300 °C revealed the SB Al-4%Dual composition achieved the lowest coefficient of friction and wear volume loss. The wear volume loss increased in the order of Al-4%Dual < Al-4%µB4C < Al-4%GNP for both SB and LT specimens, highlighting the superior wear resistance of the dual reinforcement.

Graphical Abstract