DIGITAL IMAGE CORRELATION STUDIES FOR FATIGUE MICRO-CRACK INITIATION AND PROPAGATION OF NI BASED SUPERALLOY |
| |
| Authors: | Dong Lei Kefeng Wang Qing Zhang Pizhong Qiao State |
| |
| Institution: | Dong Lei 1 Kefeng Wang Qing Zhang Pizhong Qiao (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China) (College of Mechanics and Materials, Hohai University, Nanjing 210098, China) |
| |
| Abstract: | An experimental investigation on the mechanical mechanisms of fatigue micro-crack initiation and propagation of a nickel-based superalloy is presented. By coupling digital image correlation method and scanning electron microscope, the fatigue residual strain distribution at the grain scale has been obtained. The results showed that there is a trend of accumulation for the residual strain. Micro-cracks are more likely to initiate in or near the areas with particularly large residual strain, and propagate along the large-strain paths. |
| |
| Keywords: | nickel alloy digital image correlation fatigue residual strain micro-crack |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
