Fatigue crack propagation behavior of the grain size transition zone in a dual microstructure turbine disc

被引：15

作者：

Jiang, R. ^{[1
,2
]}

Wang, Y. C. ^{[1
,2
]}

Zhang, L. C. ^{[1
,2
]}

Chen, Y. ^{[3
]}

Zhang, H. ^{[3
]}

Wang, Z. B. ^{[3
]}

Song, Y. D. ^{[1
,2
,4
]}

机构：

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

[2] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing 210016, Peoples R China

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

[4] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 172卷

基金：

中国国家自然科学基金;

关键词：

Ni-based superalloys; Dual microstructure turbine disc; Grain size transition zone; Fatigue crack propagation; Grain boundary oxidation; NI-BASED SUPERALLOY; GROWTH MECHANISMS; BASE SUPERALLOY; HEAT-TREATMENT; TEMPERATURE; OXIDATION; ALLOY; INITIATION; OXYGEN; DAMAGE;

D O I：

10.1016/j.ijfatigue.2023.107647

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Constant load amplitude , Delta K fatigue crack propagation (FCP) tests have been carried out to investigate FCP behavior of grain size transition zone in a dual microstructure turbine disc. The results show grain size exerts more significant influence in the time-dependent FCP regime, but the effect of grain size is relatively limited in the cycle-dependent FCP regime. Larger local plastic deformation zone is found in fine-grained region, which is believed to be the reason that causes more significant grain boundary oxidation along with contribution from more grain boundaries acting as short-circuit diffusion paths of oxide-forming elements, resulting in accelerated FCP.

引用

页数：11

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