Elevated temperature low cycle fatigue of grey cast iron used for automotive brake discs |
| |
| Affiliation: | 1. University of Maribor, Faculty of Mechanical Engineering, Smetanova 17, 2000 Maribor, Slovenia;2. University of Maribor, Faculty of Civil Engineering, Smetanova 17, 2000 Maribor, Slovenia;1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;2. Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China;3. Luliang University, Lishi, Shanxi 033000, China;1. The Key Lab of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, PR China;2. The Department of Mechanical and Automotive Engineering, Changchun University, Changchun 130028, PR China;1. Materials Fatigue and Fracture Division, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, PR China;2. Shougang Group Co., Ltd. Research Institute of Technology, 69 Yangzhuang Road, Beijing 100041, PR China |
| |
| Abstract: | This paper evaluates the fatigue life properties of low carbon grey cast iron (EN-GJL-250), which is widely used for automotive brake discs. Although several authors have examined mechanical and fatigue properties at room temperatures, there has been a lack of such data regarding brake discs operating temperatures. The tension, compression and low cycle fatigue properties were examined at room temperature (RT) and at brake discs’ working temperatures: 500 °C, 600 °C and 700 °C. The microstructure of the material was documented and analysed. Tensile stress–strain curves, cyclic hardening/softening curves, stress–strain hysteresis loops, and fatigue life curves were obtained for all the above-mentioned temperatures. It was concluded, that Young’s modulus is comparable with both tension and compression, but yield its strength and ultimate strength are approximately twice as great in compression than in tension. All the mechanical properties remained quite stable until 500 °C, where at 700 °C all deteriorated drastically. During fatigue testing, the samples endured at 500 °C on average at around 50% of cycles at room temperature. Similar to other materials’ properties, the cycles to failure have dropped significantly at 700 °C. |
| |
| Keywords: | Grey cast iron Automotive brake disc Fatigue testing Low cycle fatigue material parameters |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
