High Cycle Fatigue Behavior of a Wrought Nickel-Base Superalloy GH4698

Huan Wang; Chao Yuan; Jian Ting Guo; Lan Zhang Zhou; He Yong Qin

doi:10.4028/www.scientific.net/MSF.788.414

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Dynamic Recrystallization Behavior of N08028 Corrosion Resistant Alloy
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Microstructure and Mechanical Properties of Microalloyed Multiphase Steel
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High Cycle Fatigue Behavior of a Wrought Nickel-Base Superalloy GH4698
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Influence of Master Alloy on the Cleanliness of Spray Formed Superalloy
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Effect of Ta on the Solidification Behavior of Ni₃Al-Base Single-Crystal Superalloys
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Nitrogen-Bearing Carbides in K417G Alloy Doped with Different Nitrogen Contents
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Uniaxial Compression Test and FEM Simulation for GH4145 Superalloy at Room Temperature
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HomeMaterials Science ForumMaterials Science Forum Vol. 788High Cycle Fatigue Behavior of a Wrought...

High Cycle Fatigue Behavior of a Wrought Nickel-Base Superalloy GH4698

Abstract:

Smooth and notched specimens of a wrought nickel-base superalloy GH4698 were subjected to high cycle fatigue (HCF) loading at room temperature and 650°C in ambient atmosphere. The experimental results show that the fatigue strength decreased with the increasing of temperature and cyclic stress, and fatigue limit of notched specimens was lower than that of smooth specimens. The fracture surface presents typical characteristics of fatigue fracture, where both stage I and stage II crack propagation can be found. For the smooth specimens, the single primary crack initiated on the surface or subsurface, while multiple primary cracks initiated on the surface for the notched specimens because of local stress concentration.

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Periodical:

Materials Science Forum (Volume 788)

Pages:

414-420

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https://doi.org/10.4028/www.scientific.net/MSF.788.414

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Online since:

April 2014

Authors:

Huan Wang, Chao Yuan, Jian Ting Guo, Lan Zhang Zhou, He Yong Qin

Keywords:

Fatigue Limit, Fractograph, High Cycle Fatigue, Nickel-Base Superalloy

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