Short fatigue crack growth in an artificial-defect-containing nanostructured bainitic steel

被引:4
|
作者
Morales-Rivas, Lucia [1 ,2 ]
Azadi, Ava [1 ]
Kerscher, Eberhard [1 ]
机构
[1] Tech Univ Kaiserslautern TUK, Mat Testing, Gottlieb Daimler Str, D-67663 Kaiserslautern, Germany
[2] CSIC, Natl Ctr Met Res CENIM, Av Gregorio Amo 8, Madrid 28040, Spain
关键词
Nanostructured Bainitic Steels; Short Cracks; Fatigue Testing; Crack Path; EBSD; BSE; FIB Defect; PROPAGATION;
D O I
10.1016/j.ijfatigue.2022.107219
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
For a full exploitation of novel steels in applications under mechanical cyclic loading, it is vital to understand the crack-microstructure interactions. In this work, the fatigue behaviour of a nanostructured bainitic steel in the short crack regime has been studied considering the structural integrity of the material and its polycrystalline nature. For that purpose, a specimen containing an artificial defect has been designed and manufactured, sub-jected to interrupted fatigue testing, and examined by crystallography-sensitive techniques. Results show that, depending on the loading conditions, different crystallographic boundaries can play an important role in the crack path and crack growth rate.
引用
收藏
页数:11
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