Temperature Rise Due to Frictional Sliding of SUS316L Vs SUS316L and SUS316L Vs Polyimide at 4 K
Frictional heat is one of the sources for the quench of a magnet. However, it is uncertain how much temperature rises due to sliding in a magnet. In this work, frictional properties were obtained under a fretting condition using SUS316L steel and polyimide at 4.2 K in liquid helium. The temperature rise was measured using a thermocouple inserted into a steel specimen during suiding. The maximum temperature rise was 9.3 K during fretting for the metal-metal contact. The temperature peak appeared twice during one fretting cycle corresponding to the slip in a cycle, and the time lag was 30 to 50 ms after the sliding velocity reached maximum. Temperature rise was linearly proportional to the product of a maximum sliding velocity and frictional force, related to the frictional rate. The temperature rise resulted from the balance between the heat generation during the slip and the cooling during the stick in one cycle.
KeywordsTemperature Rise Maximum Velocity Austenitic Stainless Steel Frictional Force Liquid Helium
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