Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

Jiang R.; Proprentner D.; Callisti M.; Shollock B.; Hu X. T.; Song Y. D.; Reed P. A. S.

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Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

机译：氧在PM镍基高温合金中增强疲劳裂纹中的作用：应力辅助晶界氧化或动态脆化？

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The role of oxygen in enhanced fatigue cracking in an advanced Ni-based superalloy for turbine disc application has been evaluated in fatigue crack initiation and propagation stages along with static oxidation tests. It is found that the grain boundary oxide intrusion has a layered structure. The microstructure- and deformation-dependent grain boundary oxidation dominates the fatigue crack initiation and early propagation processes. As the crack propagates, this contribution arising from oxidation damage may gradually be overtaken by dynamic embrittlement processes until the mechanical damage outstrips the oxygen-related damage, resulting in a transition from intergranular to transgranular crack propagation.

机译：在疲劳裂纹萌生和扩展阶段以及静态氧化测试中，已经评估了氧在涡轮盘应用的高级镍基高温合金中增强疲劳裂纹中的作用。发现晶界氧化物侵入具有层状结构。依赖于微观结构和变形的晶界氧化占主导地位的疲劳裂纹萌生和早期传播过程。随着裂纹的扩展，由氧化破坏引起的这种贡献可能会逐渐被动态脆化过程所取代，直到机械破坏超过与氧气有关的破坏为止，从而导致从晶间裂纹扩展到跨晶裂纹扩展。

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来源
《Corrosion science》 |2018年第7期|141-154|共14页
作者
Jiang R.; Proprentner D.; Callisti M.; Shollock B.; Hu X. T.; Song Y. D.; Reed P. A. S.;
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作者单位

Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China;

Univ Warwick, WMG, Adv Mfg & Mat Ctr, Coventry CV4 7AL, W Midlands, England;

Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England;

Univ Warwick, WMG, Adv Mfg & Mat Ctr, Coventry CV4 7AL, W Midlands, England;

Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China;

Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Jiangsu, Peoples R China;

Univ Southampton, Dept Mech Engn, Mat Res Grp, Southampton SO17 1BJ, Hants, England;

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Ni-based superalloys; Fatigue crack initiation; Fatigue crack propagation; Stress assisted grain boundary oxidation; Dynamic embrittlement;

机译：镍基高温合金疲劳裂纹萌生疲劳裂纹扩展应力辅助晶界氧化动态脆化;

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1. The role of slip transfer at grain boundaries in the propagation of microstructurally short fatigue cracks in Ni-based superalloys [J] . Jimenez M., Ludwig W., Gonzalez D., Scripta materialia . 2019,第期

机译：晶界滑动转移在基于Ni基超合金中微结构短疲劳裂纹繁殖中的作用
2. Influence of orientation-dependent grain boundary oxidation on fatigue cracking behaviour in an advanced Ni-based superalloy [J] . Jiang R., Gao N., Reed P. A. S. Journal of Materials Science . 2015,第12期

机译：取向依赖性晶界氧化对高级镍基高温合金疲劳裂纹行为的影响
3. The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloy [J] . S. Cruchley, H.Y. Li, H.E. Evans, International Journal of Fatigue . 2015,第DECa期

机译：氧化损伤在高级镍基高温合金疲劳裂纹萌生中的作用
4. The Role of Oxygen-Grain-Boundary Diffusion During Intercrystalline Oxidation and Intergranular Fatigue Crack Propagation in Alloy 718 [C] . E.-G. Wagenhuber, V. B. Trindade, U. Krupp Internatonal Symposium on Superalloys 718, 625. 706 and Derivatives . 2005

机译：氧气 - 晶界扩散在合金中介质氧化和晶间疲劳裂纹繁殖期间的作用718
5. Origin and Characterization of the Local Stress State at Dislocation Channel - Grain Boundary Interaction Sites and Its Role in Irradiation Assisted Stress Corrosion Cracking [D] . Johnson, Drew Coulson. 2020

机译：位错通道 - 晶界相互作用位点局部应力状态的起源与表征及其在辐照辅助应力腐蚀裂纹中的作用
6. Hydrogen Assisted Cracking in Pearlitic Steel Rods: The Role of Residual Stresses Generated by Fatigue Precracking [O] . Jesús Toribio, Leticia Aguado, Miguel Lorenzo, 2017

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7. Influence of orientation-dependent grain boundary oxidation on fatigue cracking behaviour in an advanced Ni-based superalloy [O] . Jiang, Rong, Gao, Nong, Reed, Philippa 2015

机译：取向依赖晶界氧化对Ni基高温合金疲劳裂纹行为的影响
8. Irradiation-assisted stress corrosion cracking of materials from commercial BWRs: Role of grain-boundary microchemistry [R] . Chung, H M, Ruther, W E, Sanecki, JE, 1993

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Role of oxygen in enhanced fatigue cracking in a PM Ni-based superalloy: Stress assisted grain boundary oxidation or dynamic embrittlment?

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