|
| High Cycle Fatigue Performance of GH4169 under Vibration Bending |
| Received:August 10, 2024 Revised:August 28, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.09.002 |
| KeyWord:high frequency vibration high temperature alloy bending vibration natural frequency high cycle fatigue life |
| Author | Institution |
| HANG Chao |
National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute, Xi'an , China |
| PAN Kai |
Chinese Aeronautical Establishment, Beijing , China |
| CHEN Yonghui |
National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute, Xi'an , China |
| YAN Qun |
National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute, Xi'an , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to investigate the vibration bending high cycle fatigue (VBHCF) of nickel-based high temperature alloy GH4169. A specialized VBHCF test system was constructed based on a high-frequency vibration table and a laser vibrometer. This system accommodated test pieces designed with two distinct natural frequencies. During fatigue testing, the af value—a pivotal parameter derived from the product of the test piece's tip amplitude and natural frequency—was meticulously controlled as the primary focus. The VBHCF performance of both test pieces was investigated employing the group-testing and step-loading methodologies. The results indicated that the af value’s error margin remained under 0.5% during the fatigue tests. Furthermore, as the number of fatigue cycles progressed, the test pieces’ natural frequencies exhibited a characteristic decline, initially gradual and subsequently accelerating. In conclusion, the dual-parameter af-N fatigue life model for GH4169, formulated based on the exhaustive group-testing data, demonstrates remarkable congruence with the independent validation provided by the step-loading experiments. This robust correlation underscores the accuracy and validity of the proposed af-N fatigue model. |
| Close |
|
|
|