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.
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页数：11
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