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Author: search.filters.author.Kaliveeran, V.Subject: search.filters.subject.Dry sliding

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    Effect of sliding speed and rise in temperature at the contact interface on coefficient of friction during full sliding of SS304
    (Elsevier Ltd, 2019) Palanikumar, P.; Gnanasekaran, N.; Subrahmanya, K.; Kaliveeran, V.
    The present study focuses on the effect of sliding speed and rise in temperature on the coefficient of friction at the contact interface of SS304 alloys subjected to full sliding. Dry sliding experiments were conducted on Rotatory Type Pin on Disk Tribometer. Pins of 3 mm radius and 165 mm diameter circular disk having flat surface were fabricated to simulate Hertzian contact configuration. Experiments were conducted at three different sliding speeds of 1 m/s, 2 m/s and 3 m/s under constant normal load of 1 kg. All the experiments were conducted up to sliding distance of 100 m. From the full sliding experiments, the coefficient of friction decreased with increase in sliding speed and the stabilized coefficient of friction for SS304 alloy was in the range of 0.15-0.28. The temperatures due to friction were measured using K-type thermocouples and they were located to the pins at 4 mm and 7 mm distance from the contact surface. The temperature at the contact surface during dry sliding experiment was obtained from the acquired data using inverse heat transfer method. Temperature measured at different locations along the longitudinal axis of the pin increased with increase in sliding speed and sliding distance. The increase in temperature at the contact interface was observed due to increase in friction at the contact interface during sliding. The temperature had shown stabilized trend, when the coefficient of friction curve got stabilized during sliding process. © 2019 Elsevier Ltd.
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    Coefficient of friction of dry sliding Al 6061-T6 alloy under different loading conditions
    (Emerald Group Holdings Ltd., 2021) Srinivasula Reddy, S.R.; Kaliveeran, V.
    Purpose: This paper aims to focus on the effect of normal load, sliding speed and temperature on the coefficient of friction of Al 6061-T6 alloy under dry sliding conditions. Design/methodology/approach: Dry sliding experiments were conducted using rotary type pin on disk tribometer. Pins with 3 mm radius of contact and circular disks of 165 mm diameter were fabricated to simulate Hertzian contact configuration. Experiments were conducted by applying three different normal loads (1, 1.5 and 2 kg) and three different sliding speeds (1.25, 2 and 3 m/s) at different temperatures [room temperature (31 ± 1 °C), 60 °C, 100 °C and 150 °C]. Findings: Coefficient of friction at end of the first cycle of sliding, stabilized stage, unsteady state and steady state are reported elaborately in this study. Adhesive and abrasive wear mechanisms were observed in the dry sliding of Al 6061- T6 alloy contacts from the microscopic analysis of worn contact surfaces. The coefficient of friction was more influenced by the increase in normal load than the increase in sliding speed and temperature. Practical implications: The results obtained from this study are significant for the design of aluminium-to-aluminium contacts in aerospace engineering and automobile engineering. Originality/value: This study reveals the coefficient of friction of aluminium-to-aluminium (Al 6061-T6 alloy) contacts under cylinder on flat contact configuration. © 2020, Emerald Publishing Limited.
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    Wear and Friction Behavior of Stainless Steel and Aluminium Alloys: Role of Pin Diameter and Track Size in Dry Sliding Experiments
    (The Aeronautical and Astronautical Society of the Republic of China, 2025) Raveesh, R.M.; Kaliveeran, V.; Kundapura, S.
    Tribological characterization of materials is critical due to their extensive use in various industrial applications, where friction and wear significantly affect performance and longevity. Tribological studies helps to identify the material suitability for specific applications based on wear resistance, frictional performance, and durability under given conditions. Stainless steel (SS304, SS304L, SS316) and aluminium (Al6061, Al6082) alloys, were selected to understand their performance in dry sliding conditions. This study presents a comparative tribological analysis of stainless steels (SS304, SS304L, SS316) and aluminium alloys (Al6061, Al6082) under dry sliding conditions using a pin-on-disk tribometer. The novelty lies in evaluating the influence of pin diameter (6 mm and 8 mm) and track diameter (60–120 mm) on wear rate and coefficient of friction (CoF). Results show that Al6061 exhibited the highest wear rate (0.0676 mm3/N·m) and CoF up to 0.7, particularly under 20 N load and small track diameter (60 mm). In contrast, SS316 demonstrated the lowest wear rate (0.0023 mm3/N·m) and stable CoF (0.4), particularly under 10 N load and larger track diameter (120 mm), indicating superior wear resistance. The study reveals that smaller pin and track diameters intensify contact stress, accelerating wear in softer materials. © 2025 The Aeronautical and Astronautical Society of the Republic of China. All rights reserved.