Abstract
The goal of this study was to examine performance of various lubricants for aluminium alloy AA5083. Conventional ring compression tests were conducted at 200 °C. Samples were compressed to 50% of the initial height with a constant ram velocity 0.5 mm/s using a servo-controlled hydraulic press. The optimization procedure was implemented in self-developed software to identify friction factors from experiments. The application launches remotely finite element (FE) simulations of ring compression with a changing friction factor until a difference between experiment and numerical prediction of the internal diameter of the sample is smaller than 0.5%. FE simulations were run using Forge3 commercial software. The obtained friction factor quantitatively describes performance of a lubricant and can be used as an input parameter in FE simulation of other processes. It was shown that application of calcium aluminate conversion coating as pre-lubrication surface treatment reduced friction factor from 0.28 to 0.18 for MoS2 paste. It was also revealed that commercially available graphite-based lubricant with an addition of calcium fluoride applied on conversion coating of calcium aluminate had even lower friction factor of 0.11
| Original language | English |
|---|---|
| Pages (from-to) | 156-161 |
| Number of pages | 6 |
| Journal | Computer Methods in Materials Science |
| Volume | 15 |
| Issue number | 1 |
| Publication status | Published - Jan 2015 |
| Event | Komplastech 2015 - Computer methods in Materials Technology - Krynica Zdroj, Poland Duration: 11 Jan 2015 → 14 Jan 2015 |
Keywords
- ring compression testing
- friction factor
- lubrication monitoring