| 基于损伤力学的含夹杂粉末高温合金FGH96低周裂纹萌生寿命预测 |
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| 引用本文： | 徐元铭,张书明,贺天鹏,刘新灵,常夏源. 基于损伤力学的含夹杂粉末高温合金FGH96低周裂纹萌生寿命预测[J]. 中国有色金属学会会刊, 2022, 32(3): 895-907. DOI: 10.1016/S1003-6326(22)65845-X |
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| 作者姓名： | 徐元铭 张书明 贺天鹏 刘新灵 常夏源 |
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| 摘 要： | 研究FGH96粉末高温合金中夹杂物对低周疲劳寿命的影响,提出基于损伤力学理论的低周裂纹萌生寿命预测模型,在建立损伤演化方程后提出损伤表征参数.对含夹杂物和不含夹杂物的粉末高温合金试样在530℃和600℃下进行疲劳试验,并对具有椭圆形、半椭圆形、多边形和条形表面/亚表面夹杂物的试样进行模型验证,然后通过有限元模拟进行应力...
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| 关 键 词： | 粉末高温合金FGH96 低周疲劳 夹杂 裂纹萌生寿命预测 损伤力学 |
| 收稿时间： | 2021-03-09 |
Prediction of low-cycle crack initiation life of powder superalloy FGH96 with inclusions based on damage mechanics |
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| Affiliation: | 1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;2. AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | The effects of inclusions in powder superalloy FGH96 on low-cycle fatigue life were studied, and a low-cycle crack initiation life prediction model based on the theory of damage mechanics was proposed. The damage characterization parameter was proposed after the construction of damage evolution equations. Fatigue tests of the powder superalloy specimens with and without inclusion were conducted at 530 and 600 °C, and the model verification was carried out for specimens with elliptical, semi-elliptical, polygon and strip-shaped surface/subsurface inclusion. The stress analysis was performed by finite element simulation and the predicted life was calculated. The results showed a satisfying agreement between predicted and experimental life. |
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| Keywords: | powder superalloy FGH96 low-cycle fatigue inclusion crack initiation life prediction damage mechanics |
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