Fatigue Life Prediction and Analysis of GH4169 Considering Subsurface Residual Stress in Milling

王峻晖; 张杭; 崔飞杰; 闫蓉; 彭芳瑜; 闫澳迪

doi:10.13433/j.cnki.1003-8728.20240021

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Fatigue Life Prediction and Analysis of GH4169 Considering Subsurface Residual Stress in Milling

更新时间：2026-04-23

- Fatigue Life Prediction and Analysis of GH4169 Considering Subsurface Residual Stress in Milling
- Mechanical Science and Technology for Aerospace Engineering Vol. 45, Issue 1, Pages: 85-93(2026)
- 作者机构：
  
  1. 华中科技大学机械科学与工程学院,武汉,430074
  2. 华中科技大学数字制造装备与技术国家重点实验室机构,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20240021
  CLC：
- Published：2026
- 稿件说明：
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王峻晖, 张杭, 崔飞杰, et al. Fatigue Life Prediction and Analysis of GH4169 Considering Subsurface Residual Stress in Milling[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(1): 85-93.
DOI：

王峻晖, 张杭, 崔飞杰, et al. Fatigue Life Prediction and Analysis of GH4169 Considering Subsurface Residual Stress in Milling[J]. Mechanical Science and Technology for Aerospace Engineering, 2026, 45(1): 85-93. DOI： 10.13433/j.cnki.1003-8728.20240021.

摘要

高温合金GH4169是典型的难加工材料，铣削后零部件的表面完整性直接影响其疲劳性能。该文考虑铣削工况下的亚表层残余应力分布，综合铣削表面加工硬化、表面形貌等参数修正了其疲劳寿命预测模型中的影响项，并分析了各项表面完整性指标对疲劳寿命的影响比例。实验结果表明，该文提出的考虑表面完整性影响项的预测模型可以较为精确地预测GH4169的疲劳寿命。在该研究的铣削参数范围内，相较于表面形貌，亚表层残余应力和表面加工硬化对疲劳寿命的影响较大，并相互制约；铣削表面至最大残余压应力深度间的残余应力均值和表面残余应力表征的加工硬化可以共同反映疲劳寿命变化趋势。

Abstract

Superalloy GH4169 is a typical difficult-to-machine material

and the surface integrity of milled parts directly affects its fatigue properties. In this paper

considering the residual stress distribution on the subsurface in the milling

the influence terms of the fatigue life prediction model were modified based on the parameters of work hardening and surface morphology

and the influence proportions of the surface integrity index on the fatigue life were analyzed. The experimental results show that the fatigue life of GH4169 can be accurately predicted by using the prediction model which considers the influence term of surface integrity. In the range of milling parameters

comparing with the surface topography

subsurface residual stress and surface work hardening have greater influence on the fatigue life and restrict each other. The mean value of residual stress between the milled surface and the depth of the maximum residual compressive stress and the work hardening characterized by the surface residual stress can reflect the variation trend of fatigue life.

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