Influence of Grain Orientation Distribution on the High Temperature Fatigue Behaviour of Notched Specimen Made of Polycrystalline Nickel-Base Superalloy

被引：6
|
作者：
Engel, Benedikt [1 ]
Ohneseit, Sebastian [2 ]
Maede, Lucas [3 ]
Beck, Tilmann [4 ]
机构：
[1] Univ Nottingham, Gasturbine & Transmiss Res Ctr G2TRC, Nottingham NG7 2RD, England
[2] Karlsruhe Inst Technol, Inst Appl Mat Appl Mat Phys, D-76344 Eggenstein Leopoldshafen, Germany
[3] Siemens AG, Dept Technol & Innovat, Gas & Power Div, D-10553 Berlin, Germany
[4] Univ Kaiserslautern, Inst Mat Sci & Engn, D-67655 Kaiserslautern, Germany
来源：
METALS | 2021年 / 11卷 / 05期
关键词：
nickel-base superalloy; LCF; grain orientation distribution; texture; resulting shear stress; polycrystalline finite element simulation; high temperature;
D O I：
10.3390/met11050731
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two different material batches made of random and textured orientated polycrystalline nickel-base superalloy Rene80 were investigated under isothermal low cycle fatigue tests at 850 degrees C for a notched specimen geometry. In contrast to a smooth specimen geometry, no significant improvement in fatigue behaviour of the notched specimen could be observed for the textured material. Finite element simulations reveal an area along the notch where high stiffness evolves for the textured material, which lead to nearly similar shear stresses in the slip systems compared to a random orientation distribution and therefore to no distinct differences in the lifetime.
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页数：21
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