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High-Temperature Tribological Behavior and Wear Mechanisms of Stellite 6 Alloy.

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Title: High-Temperature Tribological Behavior and Wear Mechanisms of Stellite 6 Alloy.
Authors: Jiang, Kai1 (AUTHOR), Lu, Hongbin2 (AUTHOR) lhb20011020@163.com, Chen, Weijie2,3 (AUTHOR), Sun, Fei1,2 (AUTHOR), Luo, Zhe2,3 (AUTHOR), Gu, Xiaomeng3 (AUTHOR) guxiaomeng2012@126.com
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 12, p2629. 16p.
Subjects: Temperature effect, Sliding wear, Mechanical wear, Tribology, Sliding friction, Alloys, Oxide coating
Abstract: The temperature-dependent wear behavior of a cobalt-based Stellite 6 alloy was investigated from room temperature (RT) to 800 °C using high-temperature reciprocating sliding tests. The friction coefficient decreases monotonically with increasing temperature, from about 0.56 ± 0.12 at RT to 0.26 ± 0.11 at 800 °C, whereas the wear rate exhibits a pronounced non-monotonic evolution. Specifically, the wear rate increases from 18.4 ± 1.5 × 10−6 mm3·N−1·m−1 at RT to a maximum of 54.8 ± 1.6 × 10−6 mm3·N−1·m−1 at 600 °C, followed by an anomalous reduction to 10.2 ± 1.5 × 10−6 mm3·N−1·m−1 at 800 °C, which is even lower than that at RT. Microstructural and elemental analyses indicate that this behavior is governed by the temperature-dependent evolution of oxide layers. At RT–600 °C, thin and mechanically unstable oxide films repeatedly form and fracture, promoting oxidation-assisted abrasive and adhesive wear. In contrast, at 800 °C, a continuous and dense oxide layer forms and acts as a stable tribo-oxide film, effectively suppressing severe material removal. These findings clarify the temperature-driven wear mechanism transition of Stellite 6 alloy under high-temperature sliding conditions. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 194907703
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  Label: Title
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  Data: High-Temperature Tribological Behavior and Wear Mechanisms of Stellite 6 Alloy.
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  Data: <searchLink fieldCode="AR" term="%22Jiang%2C+Kai%22">Jiang, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Hongbin%22">Lu, Hongbin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> lhb20011020@163.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Weijie%22">Chen, Weijie</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Fei%22">Sun, Fei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Zhe%22">Luo, Zhe</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gu%2C+Xiaomeng%22">Gu, Xiaomeng</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> guxiaomeng2012@126.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 12, p2629. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Sliding+wear%22">Sliding wear</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+wear%22">Mechanical wear</searchLink><br /><searchLink fieldCode="DE" term="%22Tribology%22">Tribology</searchLink><br /><searchLink fieldCode="DE" term="%22Sliding+friction%22">Sliding friction</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Oxide+coating%22">Oxide coating</searchLink>
– Name: Abstract
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  Group: Ab
  Data: The temperature-dependent wear behavior of a cobalt-based Stellite 6 alloy was investigated from room temperature (RT) to 800 °C using high-temperature reciprocating sliding tests. The friction coefficient decreases monotonically with increasing temperature, from about 0.56 ± 0.12 at RT to 0.26 ± 0.11 at 800 °C, whereas the wear rate exhibits a pronounced non-monotonic evolution. Specifically, the wear rate increases from 18.4 ± 1.5 × 10−6 mm3·N−1·m−1 at RT to a maximum of 54.8 ± 1.6 × 10−6 mm3·N−1·m−1 at 600 °C, followed by an anomalous reduction to 10.2 ± 1.5 × 10−6 mm3·N−1·m−1 at 800 °C, which is even lower than that at RT. Microstructural and elemental analyses indicate that this behavior is governed by the temperature-dependent evolution of oxide layers. At RT–600 °C, thin and mechanically unstable oxide films repeatedly form and fracture, promoting oxidation-assisted abrasive and adhesive wear. In contrast, at 800 °C, a continuous and dense oxide layer forms and acts as a stable tribo-oxide film, effectively suppressing severe material removal. These findings clarify the temperature-driven wear mechanism transition of Stellite 6 alloy under high-temperature sliding conditions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma19122629
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        Text: English
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        Type: general
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      – SubjectFull: Sliding friction
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      – SubjectFull: Alloys
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      – SubjectFull: Oxide coating
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      – TitleFull: High-Temperature Tribological Behavior and Wear Mechanisms of Stellite 6 Alloy.
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            NameFull: Jiang, Kai
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            NameFull: Lu, Hongbin
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              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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