Investigations on the material property changes of ultrasonic-vibration assisted aluminum alloy upsetting |
| |
| Affiliation: | 1. Department of Mechanical Engineering, National Chin-Yi University of Technology, Taiping, Taichung, Taiwan, ROC;2. Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan, ROC;1. Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauzkhas, New Delhi 110016, India;2. Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;3. Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Republic of Korea;4. Department of Materials Engineering, Indian Institute of Science, Bangalore 560 012, India;1. College of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China;2. Research School of Engineering, Australian National University, Canberra, ACT 2601, Australia |
| |
| Abstract: | Numerous studies have shown the benefit of ultrasonic-vibration assisted metal forming. This benefit include a reduction in forming forces, which might be attributed to the superposition of stress, increased temperatures, the effects of interface friction, and energy absorption of dislocation. This study conducts a series of experiments and analyses to investigate the main mechanisms of a reduction in forming forces during ultrasonic-vibration assisted A6061-T6 aluminum alloy upsetting.The findings of this research confirm that, under frictionless conditions, ultrasonic vibration still reduced forming forces, and ultrasonic vibration can increase the temperature of specimens and soften specimen surface during upsetting. From metallographic analyses and micro-hardness tests, the results reveal that energy absorption of dislocation was occurred during upsetting, which also contribute to the reduction of forming force.This research concludes that the mechanisms of increased temperatures and energy absorption of dislocation can affect the material property and make a reduction in forming forces; however, the interface friction effect has nothing to do with a reduction in forming forces. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
