Slip band formation and crack initiation during very high cycle fatigue of duplex stainless steel – Part 1: Mechanical testing and microstructural investigations

2018 ◽  
pp. 95-110
Author(s):  
T. Waurischk ◽  
M. Söker ◽  
A. Giertler ◽  
N. Schönhoff ◽  
M. Galster ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Crack Initiation ◽  
Duplex Stainless Steel ◽  
Mechanical Testing ◽  
Slip Band ◽  
Steel Part ◽  
Band Formation ◽  
Very High Cycle Fatigue ◽  
Stainless Steel Part ◽  
Very High

scholarly journals Bending Fatigue Behavior of 316L Stainless Steel up to Very High Cycle Fatigue Regime

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4820
Author(s):  
Yongtao Hu ◽  
Yao Chen ◽  
Chao He ◽  
Yongjie Liu ◽  
Qingyuan Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Slip Band ◽  
316L Stainless Steel ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Fatigue Cracks ◽  
Propagation Mechanism ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High

Effect of microstructure on the crack initiation and early propagation mechanism in the very high cycle fatigue (VHCF) regime was studied in 316L stainless steel (316L SS) by atomic force microscope (AFM) and electron back scattered diffraction (EBSD). The results show that small fatigue cracks initiate from the slip band near the grain boundaries (GBs) or the twin boundaries (TBs). Early crack propagation along or cross the slip band is strongly influenced by the local microstructure such as grain size, orientation, and boundary. Besides, the gathered slip bands (SBs) are presented side by side with the damage grains of the run-out specimen. Finally, it is found that dislocations can either pass through the TBs, or be arrested at the TBs.

Sign in / Sign up

Export Citation Format

Share Document