Effect of temperature on the frictional behaviour of an aluminium alloy sliding against steel during ball-on-disc tests
作者： L. Wang , Y. He , J. Zhou , J. Duszczyk
DOI: 10.1016/J.TRIBOINT.2009.06.009
关键词: Aluminium alloy 、 Extrusion 、 Aluminium extrusion 、 Friction coefficient 、 Materials science 、 Metallurgy 、 Fe simulation 、 Stress–strain curve 、 Aluminium 、 Ball (bearing)
摘要: Ball-on-disc tests were carried out at elevated temperatures to determine the friction behaviour of 7475 aluminium alloy against steel, resembling material mating during hot extrusion. Friction coefficient was found increase markedly with rising temperature, suggesting that commonly accepted assumption an unvaried in FE simulation extrusion process involving temperature evolution is incorrect. A theoretical analysis showed high values measured high-temperature ball-on-disc could be partly attributed increased plowing caused by severe deformation alloy. The effect on stress and strain distributions ball/disc interface revealed means three-dimensional finite-element (3D FE) simulation. Increased disc around contact point confirmed. alterations state considered responsible for generation wear debris, oscillations along track temperature.
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