scholarly journals Tracking hydrogen embrittlement using short fatigue crack behavior of metals

2018 ◽  
Vol 13 ◽  
pp. 1427-1432 ◽  
Author(s):  
Vishal Singh ◽  
Rajwinder Singh ◽  
Amanjot Singh ◽  
Dhiraj K. Mahajan
Keyword(s):  
Fatigue Crack ◽  
Hydrogen Embrittlement ◽  
Short Fatigue Crack ◽  
Crack Behavior

scholarly journals Short Fatigue Crack Behavior of LZ50 Axle Steel Under Rotating-Bending Cyclic Loading

2018 ◽  
Vol 50 (1) ◽  
pp. 193-202 ◽  
Author(s):  
B. Yang ◽  
S. Dai ◽  
Y. Y. Wu ◽  
Z. Liao ◽  
S. Liang ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Cyclic Loading ◽  
Short Fatigue Crack ◽  
Crack Behavior ◽  
Rotating Bending

scholarly journals Hydrogen Embrittlement Mechanism in Fatigue Behaviour of Austenitic and Martensitic Stainless Steels

2018 ◽  
Vol 165 ◽  
pp. 22002
Author(s):  
Sven Brück ◽  
Volker Schippl ◽  
Hans-Jürgen Christ ◽  
Claus-Peter Fritzen
Keyword(s):  
Fatigue Crack ◽  
Hydrogen Embrittlement ◽  
Crack Growth ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
High Strength ◽  
Fatigue Behaviour ◽  
Short Fatigue Crack ◽  
Crack Morphology ◽  
Insight Into

In the present study, the influence of hydrogen on the fatigue behaviour of the high strength martensitic stainless steel X3CrNiMo13-4 and the metastable austenitic stainless steels X2Crni19-11 with various nickel contents was examined in the low and high cycle fatigue regime. The focus of the investigations was the changes in the mechanisms of short crack propagation. The aim of the ongoing investigation is to determine and quantitatively describe the predominant processes of hydrogen embrittlement and their influence on the short fatigue crack morphology and crack growth rate. In addition, simulations were carried out on the short fatigue crack growth, in order to develop a detailed insight into the hydrogen embrittlement mechanisms relevant for cyclic loading conditions.

scholarly journals Effect of Periodic Overloads on Short Fatigue Crack Behavior in CuNi2Si Alloy under Rotating Bending Load

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1267
Author(s):  
Yahang Qin ◽  
Bing Yang ◽  
Bo Feng ◽  
Yifan Li ◽  
Shoune Xiao ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Cracks ◽  
Fatigue Crack Initiation ◽  
Constant Load ◽  
Multiple Cracks ◽  
Short Fatigue Crack ◽  
Crack Behavior ◽  
Bending Load ◽  
Rotating Bending

In this study, the short fatigue crack behavior in a precipitation-strengthened CuNi2Si alloy was investigated using a replica technique under rotating bending loads with periodic overloads, an overload ratio of 1.5, and the stress ratio of both was R = −1. The results show that all the fatigue cracks originated from the surface of the specimen and displayed a trend of slow initiation and then rapid propagation. The introduction of overloads significantly reduced the fatigue crack initiation time and the fatigue life of the sample. The average life of the overloaded samples was only 31% that of the constant load samples. For overload specimens, multiple cracks grew at the same time and merged at different stages, causing the crack length to increase instantaneously after they merged, thereby considerably reducing the fatigue life. Fractographical analysis and observation of the surface-etched sample replica film showed that cracks in samples with and without overload both propagated along the grain boundaries.

scholarly journals Description of short fatigue crack propagation under low cycle fatigue regime

2016 ◽  
Vol 2 ◽  
pp. 3010-3017 ◽  
Author(s):  
Pavel Hutař ◽  
Jan Poduška ◽  
Alice Chlupová ◽  
Miroslav Šmíd ◽  
Tomáš Kruml ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Short Fatigue Crack
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