Oxidation accelerated dwell fatigue crack growth mechanisms of a coarse grained PM Ni-based superalloy at elevated temperatures

被引：17
作者：
Wu, C. H. [1 ,2 ]
Jiang, R. [1 ,2 ]
Zhang, L. C. [1 ,2 ]
Wang, Y. C. [1 ,2 ]
Chen, Y. [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] Xiamen Univ Technol, Key Lab Funct Mat & Applicat Fujian Prov, Xiamen 361024, Peoples R China
[4] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 209卷
基金：
中国国家自然科学基金;
关键词：
Dwell fatigue crack growth; Crack tip; Grain boundary oxidation; Deformation structure; PM Ni-based superalloys; NICKEL-BASED SUPERALLOY; BOUNDARY OXIDATION; CREEP-FATIGUE; BEHAVIOR; EMBRITTLEMENT; STRESS; MICROSTRUCTURE; OXYGEN; ALLOY; ORIENTATION;
D O I：
10.1016/j.corsci.2022.110702
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fatigue crack growth (FCG) mechanisms of Ni-based superalloy FGH4098 at 650 degrees C-800 degrees C was investigated. The increased temperature and prolonged dwell time enhance the FCG rate by 2-3 orders of magnitude due to grain boundary (GB) oxidation. Characterization at the propagating crack tips with EBSD, TKD, TEM and EDX shows deformation (e.g. dislocations and stacking faults) mainly confines within gamma channel along with orientation change within grains due to the severe deformation. Pre-formed oxides at uncracked GB fracture under stress, facilitating FCG process. A mechanism map of interaction between deformation-assisted GB oxidation and FCG is proposed.
引用
收藏
页数：13
相关论文
共 48 条
[1]   Cyclic and time-dependent crack growth mechanisms in Alloy 617 at 800 °C [J].
Addison, Dylan A. ;
Tucker, Julie D. ;
Siegmund, Thomas ;
Tomar, Vikas ;
Kruzic, Jamie J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 737 :205-212
[2]   GRAIN-BOUNDARY EMBRITTLEMENT OF THE IRON-BASE SUPERALLOY-IN903A [J].
BRICKNELL, RH ;
WOODFORD, DA .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (09) :1673-1680
[3]   THE EMBRITTLEMENT OF NICKEL FOLLOWING HIGH-TEMPERATURE AIR EXPOSURE [J].
BRICKNELL, RH ;
WOODFORD, DA .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (03) :425-433
[4]   The development of microstructural damage during high temperature creep-fatigue of a nickel alloy [J].
Carroll, L. J. ;
Cabet, C. ;
Carroll, M. C. ;
Wright, R. N. .
INTERNATIONAL JOURNAL OF FATIGUE, 2013, 47 :115-125
[5]   Mechanistic modelling of time-dependent fatigue crack growth in Ni-based superalloys [J].
Chan, Kwai S. .
MATERIALS AT HIGH TEMPERATURES, 2016, 33 (4-5) :425-438
[6]   Effect of dynamic embrittlement on high temperature fatigue crack propagation in IN718-experimental characterisation and mechanism-based modelling [J].
Christ, H. -J. ;
Wackermann, K. ;
Krupp, U. .
MATERIALS AT HIGH TEMPERATURES, 2016, 33 (4-5) :528-535
[7]   An overview of the oxidation of Ni-based superalloys for turbine disc applications: surface condition, applied load and mechanical performance [J].
Cruchley, Samuel ;
Evans, Hugh ;
Taylor, Mary .
MATERIALS AT HIGH TEMPERATURES, 2016, 33 (4-5) :465-475
[8]   A mechanism for stress-aided grain boundary oxidation ahead of cracks [J].
Evans, H. E. ;
Li, H. Y. ;
Bowen, P. .
SCRIPTA MATERIALIA, 2013, 69 (02) :179-182
[9]   Time dependent effects in fatigue of titanium and nickel alloys [J].
Evans, WJ .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2004, 27 (07) :543-557
[10]   Comparison of fatigue crack propagation behaviour in two gas turbine disc alloys under creep-fatigue conditions: evaluating microstructure, environment and temperature effects [J].
Everitt, S. ;
Jiang, R. ;
Gao, N. ;
Starink, M. J. ;
Brooks, J. W. ;
Reed, P. A. S. .
MATERIALS SCIENCE AND TECHNOLOGY, 2013, 29 (07) :781-787
12345