Low-cycle fatigue life prediction of powder metallurgy superalloy considering characteristic parameters of inclusions

被引：1

作者：

Feng, Yefei ^{[1
]}

Zhang, Lu ^{[2
,3
]}

Wang, Yuzhuo ^{[2
,3
]}

Yu, Zhiwei ^{[2
,3
]}

Jiang, Rong ^{[2
,3
]}

Zhou, Xiaoming ^{[1
]}

Zou, Jinwen ^{[1
]}

Wang, Xuqing ^{[1
]}

机构：

[1] AEEC Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Key Lab Aeroengine Thermal Environm & Struct, Minist Ind & Informat Technol, Nanjing 210016, Peoples R China

[3] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2024年 / 47卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

characteristic parameters of inclusions; fatigue life prediction model; low-cycle fatigue; non-metallic inclusions; powder metallurgy superalloy; NONMETALLIC INCLUSIONS; CRACK INITIATION; NI SUPERALLOY; BEHAVIOR; GROWTH; PROPAGATION; NUCLEATION; MECHANISM;

D O I：

10.1111/ffe.14164

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Foreign non-metallic inclusions can significantly reduce the low-cycle fatigue (LCF) life of powder metallurgy (PM) superalloy and greatly affect the safety and reliability of aeroengines. In this paper, LCF experiments on PM FGH96 superalloy with and without inclusions were conducted. Effects of inclusions on the fatigue life and damage mechanism of FGH96 alloy are discussed by fractography analysis. Parameters related to inclusion characteristics such as strength-inclusion coefficient are proposed. By introducing characteristic parameters of inclusions, the LCF life prediction models are established based on the Manson-Coffin relationship, which significantly improved the prediction accuracy and reduced the scattering band by a factor of 2.

引用

页码：20 / 34

页数：15

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