研究目的
Experimental investigation of temperature conditions in contact zones of UFG materials in sliding friction.
研究成果
The subsurface temperature values obtained were below but close to the corresponding recrystallization start temperatures, suggesting that some recrystallization events might occur in sliding friction on the UFG materials. High heat conductance materials like aluminum alloys and copper provided good heat removal, while low heat conductive AISI 321 steel demonstrated strong localization of heating just below the worn surface.
研究不足
The study focused on three specific materials and may not be generalizable to all UFG materials. The calibration procedure for the IR thermal imaging camera and the protection of the camera lens from contamination were challenging.
1：Experimental Design and Method Selection:
The study used an IR thermal imaging camera FLIR A655SC attached to a tribological setup to measure temperature distributions below the worn surfaces of UFG materials.
2：Sample Selection and Data Sources:
UFG samples made of AISI 321 stainless steel, aluminum alloy 5052, and C11000 copper were used. The counterbody was a quenched and tempered
3：98 wt.C% 18 wt.%Cr steel. List of Experimental Equipment and Materials:
FLIR A655SC thermal imaging camera, ZnSe disk for IR light transparency, and a thin sheet metal IR camera box for protection.
4：Experimental Procedures and Operational Workflow:
Sliding speed was set at
5：25, 5, and 1 m/s at contact pressure 4 MPa. Temperature measurements were taken below the worn surfaces. Data Analysis Methods:
The temperature distributions were analyzed to assess the thermal stability of the UFG materials under friction.
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