Aermet100高强钢在大气中的疲劳寿命预测

徐灿; 田栋华; 王洪利; 吴铖川; 郑淮北; 陆永浩

doi:10.7513/j.issn.1004-7638.2025.02.026

Aermet100高强钢在大气中的疲劳寿命预测

doi: 10.7513/j.issn.1004-7638.2025.02.026

1.
北京科技大学国家材料服役安全科学中心, 北京 100083
2.
成都先进金属材料产业技术研究院股份有限公司, 四川成都 610300

基金项目: 中央高校基本科研业务费专项资金项目(FRT-TP-22-016A1)；重大工程材料服役安全研究评价设施国家重大科技基础设施开放课题基金(MSAF-2021-002)。

详细信息

作者简介:
徐灿，1999年出生，男，汉族，湖北武汉人，硕士研究生，主要从事腐蚀疲劳方面的研究，E-mail:volcano2024@163.com

通讯作者:
田栋华，男，宁夏中卫人，博士，工程师，主要从事金属材料服役性能评价研究，E-mail:tdh1015@ustb.edu.cn

中图分类号: TF76
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出版历程
- 收稿日期: 2024-03-06
- 刊出日期: 2025-05-06

Fatigue life prediction of Aermet100 steel in the atmosphere

1.
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
2.
Chengdu Advanced Metal Materials Industrial Technology Institute Co., Ltd., Chengdu 610300, Sichuan, China

摘要

摘要: 疲劳是高强钢在服役过程中常见的失效形式之一，一旦发生将造成灾难性的事故。针对常用A100高强钢的微观组织以及在大气中的高周疲劳寿命进行相关研究，结果表明：A100高强钢微观组织主要由马氏体束，厚度约8 nm的逆变奥氏体薄膜和直径2～4 nm、长约9～14 nm的棒状M₂C碳化物构成。在疲劳试验中，随着应力降低，微观组织中亚晶界数量增多，板条块界的数量显著减少，马氏体组织拉长。同时，拟合获得了疲劳寿命与应力水平的关系：lgN=7.54−1.29lg(S_max-953.06)。
- 高强钢 /
- 疲劳性能 /
- 高周疲劳 /
- 寿命预测
Abstract: Fatigue is one of the common failure modes of high strength steels in service. Once it occurs, it will cause catastrophic accidents. In this study, the microstructures and high cycle fatigue life of A100 high strength steel in the atmosphere were studied. The results show that the microstructures of A100 high strength steel are mainly composed of martensite bundles, the reversed austenite films with a thickness of 8 nm and rod-like M₂C carbides with 2～4 nm in diameter and 9～14 nm in length. In the fatigue tests, the number of subgrain boundaries in the microstructures increases with a significant decrease of the number of lath boundaries as the stress decreases, and the martensite structure is elongated. In the meanwhile, the relationship between the fatigue life and stress level was obtained by fitting the S-N fatigue life curves: lgN = 7.54−1.29lg (S_max-953.06 ).
- high-strength steel /
- fatigue properties /
- high cycle fatigue /
- life expectancy

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图 1 高周疲劳试样图纸（单位：mm)

Figure 1. Specimen drawings for high cycle fatigue tests

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图 2 A100高强钢的微观组织

（a）（b）光镜图；（c）（d）电镜图

Figure 2. Microstructures of A100 high strength steel

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图 3 A100高强钢的透射电镜形貌

（a）明场；（b）逆变奥氏体衍射斑点；（c）暗场；（d）碳化物高分辨图；（e）碳化物傅里叶衍射斑点

Figure 3. Transmission electron microscopy of A100 high strength steel

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图 4 A100高强钢微观组织EBSD表征

（a）扫描电镜微观组织；（b）IPF图；（c）KAM图；（d）晶界角度统计

Figure 4. EBSD microstructural characterization of A100 high strength steel

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图 5 A100高强钢在大气环境下的S-N曲线

Figure 5. The S-N curve of A100 high strength steel in the atmospheric environment

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图 6 A100高强钢在大气环境下不同应力下的疲劳断口形貌

（a）1 179 MPa；（b）1 079 MPa；（c）1 029 MPa；（d）979 MPa；（e）954 MPa

Figure 6. Fatigue fracture morphology of A100 high strength steel under different stresses in the atmospheric environment

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图 7 A100高强钢在大气环境下不同应力下的疲劳断口三维轮廓

Figure 7. Three-dimensional profiles of fatigue fracture of A100 high strength steel under different stresses in atmospheric environment

（a）1 179 MPa;（b）1 079 MPa;（c）1 029 MPa;（d）979 MPa;（e）954 MPa

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图 8 A100高强钢在大气环境、不同应力下疲劳试样截面EBSD分析

（a）1 179 MPa; （b）1 079 MPa;（c）1 029 MPa;（d）979 MPa; （e）954 MPa; （f）不同取向差晶界的占比关系

Figure 8. EBSD analysis of the fatigue specimen section of A100 high strength steel under different stresses in the atmospheric environment

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表 1 Aermet100化学成分

Table 1. Chemical composition of the aermet100 steel %

C Co Cr Mn Mo Ni P S Si Ti O N H

0.255 14.27 3.14 ＜0.005 1.32 12.22 0.0041 ＜0.0005 0.155 ＜0.005 0.0019 0.0009 0.00006

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