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<p>Nickel-based alloys, such as Inconel 718 (IN718), are widely used in the aerospace industry due to their excellent mechanical strength, oxidation resistance, and thermal stability at elevated temperatures. However, despite their superior high-temperature performance, understanding their friction and wear behavior under varying temperature conditions remains crucial for improving component life and efficiency. In this context, the present study investigates the influence of temperature on the friction and wear mechanisms of IN718 when sliding against an alumina counterface. Experiments were conducted using a high temperature ball-on-flat reciprocating apparatus. The results showed that the coefficient of friction&#xa0;(CoF) of IN718 remained nearly identical with varying temperature up to 450&#xa0;°C. However, the wear rate for the IN718 alloy increased with increasing temperature. To better understand this behavior, the emphasis of this study was placed on the correlation between the tribological behaviour of the Ni-based alloy and the third body formation process, characterized using micro-Raman and scanning electron microscopy (SEM). The analyses indicated the formation of randomly distributed oxide patches of Cr<sub>2</sub>O<sub>3</sub> and Fe<sub>2</sub>O<sub>3</sub> along with wear&#xa0;debris particles, which contributed to enhanced abrasive wear. As the temperature increased, the formation&#xa0;of these abrasive oxide particles led to severe wear on both the IN718 surface and the alumina counterface.</p>

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Dry sliding wear and subsurface deformation mechanisms of inconel 718 at room and elevated temperatures

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Payank Patel,
  • Amit Roy,
  • Parikshit Tonge,
  • Yinyin Zhang,
  • M. V. N. Vamsi,
  • Richard R. Chromik,
  • Pantcho Stoyanov

摘要

Nickel-based alloys, such as Inconel 718 (IN718), are widely used in the aerospace industry due to their excellent mechanical strength, oxidation resistance, and thermal stability at elevated temperatures. However, despite their superior high-temperature performance, understanding their friction and wear behavior under varying temperature conditions remains crucial for improving component life and efficiency. In this context, the present study investigates the influence of temperature on the friction and wear mechanisms of IN718 when sliding against an alumina counterface. Experiments were conducted using a high temperature ball-on-flat reciprocating apparatus. The results showed that the coefficient of friction (CoF) of IN718 remained nearly identical with varying temperature up to 450 °C. However, the wear rate for the IN718 alloy increased with increasing temperature. To better understand this behavior, the emphasis of this study was placed on the correlation between the tribological behaviour of the Ni-based alloy and the third body formation process, characterized using micro-Raman and scanning electron microscopy (SEM). The analyses indicated the formation of randomly distributed oxide patches of Cr2O3 and Fe2O3 along with wear debris particles, which contributed to enhanced abrasive wear. As the temperature increased, the formation of these abrasive oxide particles led to severe wear on both the IN718 surface and the alumina counterface.