Effect of foreign object damage on fatigue strength of stainless steel

ZHAO Zhen-hua; CHEN Wei; GUAN Yu-pu; GE Ning; LI Yong-jian

doi:10.13224/j.cnki.jasp.2016.07.024

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Effect of foreign object damage on fatigue strength of stainless steel

更新时间：2026-07-07

- Effect of foreign object damage on fatigue strength of stainless steel
- Vol. 31, Issue 7, Pages: 1736-1743(2016)
- 作者机构：
  
  1. 南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室,南京,210016
  2. 先进航空发动机协同创新中心,北京,100191
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2016.07.024
  CLC：
- Published：2016
- 稿件说明：
移动端阅览
赵振华, 陈伟, 关玉璞, 葛宁, 李永建. 外物损伤对不锈钢疲劳强度的影响[J]. 航空动力学报, 2016, 31(7): 1736-1743.

doi: 10.13224/j.cnki.jasp.2016.07.024
赵振华, 陈伟, 关玉璞, 葛宁, 李永建. 外物损伤对不锈钢疲劳强度的影响[J]. 航空动力学报, 2016, 31(7): 1736-1743. DOI： 10.13224/j.cnki.jasp.2016.07.024.

doi: 10.13224/j.cnki.jasp.2016.07.024 DOI：

摘要

基于空气炮法，针对不锈钢平板试样开展了外物损伤（FOD）模拟试验，使用三维体式显微镜观测了损伤的宏观特征，并用扫描电子显微镜观测了损伤的微观特征，模拟外物损伤具有挤压变形、材料的剪切丢失、塑性变形等宏观特征和微小裂纹、塑性变形、微小缺口、片层结构等微观特征.采用步进法对FOD试样进行了高周疲劳试验，试验结果表明FOD使试样的疲劳强度相对未损伤试样下降超过14%，并且随损伤尺寸的增大，试样的疲劳强度基本呈降低的趋势.疲劳源区多为损伤处的微小缺口或微小裂纹，说明FOD为疲劳裂纹的萌生和扩展提供了有利条件.

Abstract

Based on air gun method

the foreign object damage (FOD) simulation test of stainless steel plate specimen was carried out. The macroscopic characteristics of damage were observed by three-dimensional numerical microscope

whilst the microscopic characteristics of damage were observed by scanning electron microscope. It was found that

the macro damage characteristics include compressional deformation

material shear loss

plastic deformation

etc.

and the micro damage characteristics of damaged specimens involve micro cracks

plastic deformation

micro notches and lamellar structure

etc. By step loading test method

the high cycle fatigue test was made on FOD specimen. The test results show that the fatigue strength of FOD specimen deceases over 14% compared with non-damaged specimen. Fatigue strength decreases with the increasing damage size. The origin of the fatigue cracks lies in micro cracks or micro notches

indicating that FOD provides favorable conditions for fatigue crack initiation and growth.

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