Analysis of the fatigue crack growth mechanisms in equimolar body centered cubic HfNbTaTiZr high-entropy alloy: Discussions on its singularities and consequences on the crack propagation rate properties

2019 ◽  
Vol 110 ◽  
pp. 106459 ◽  
Author(s):  
B. Guennec ◽  
V. Kentheswaran ◽  
L. Perrière ◽  
A. Ueno ◽  
I. Guillot ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Propagation ◽  
Crack Growth ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
High Entropy Alloy ◽  
Body Centered Cubic ◽  
Growth Mechanisms ◽  
High Entropy

FATIGUE CRACK GROWTH BEHAVIOR OF STAINLESS STEEL COATED WITH TiN FILM

2012 ◽  
Vol 06 ◽  
pp. 282-287
Author(s):  
SATOSHI FUKUI ◽  
DAISUKE YONEKURA ◽  
RI-ICHI MURAKAMI
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Propagation ◽  
Crack Growth ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Crack Growth Behavior ◽  
Tin Film

In our previous study, we examined the influence of the fatigue properties of the stainless steel coated with TiN film and clarified the influence of TiN coating and the surface roughness on the fatigue property. In this study, the four point bending fatigue crack growth tests were carried out for martensitic stainless steel coated with TiN film deposited by arc ion plating method in order to investigate the effect of surface finishing on the fatigue crack behavior for film coated material. The fatigue crack growth behavior was evaluated using the replica method. As a result, the crack propagation rate of mirror polished specimens were lower than that of rough surface specimens. The crack propagation rate was especially decreased for TiN coatings deposited on the mirror polished substrate. The surface roughness near the crack initiation site increased after fatigue test. It concludes that the surface roughness of substrate influences crack propagation rate and the deposition of TiN film affected influenced crack propagation rate and fatigue strength when the surface roughness of substrate is small enough.

Effect of the Fracture Toughness of Materials (Kc) on Fatigue Crack Propagation Rate

2012 ◽  
Vol 594-597 ◽  
pp. 1005-1008 ◽  
Author(s):  
Li Xiong Gu ◽  
Zhong Yong Xu ◽  
Zhi Fang Liu
Keyword(s):  
Fracture Toughness ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Propagation ◽  
Crack Growth ◽  
Fatigue Crack Propagation ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Fatigue Crack Propagation Rate ◽  
Test Results

In this paper, the fracture toughness of materials, , effects on fatigue crack propagation that can be quantified using the dynamical coefficient mechanics (DCM) model. And we can not only change the material with high value, but also should take other methods into consideration to decrease the fatigue crack growth (FCG) rate when replacing material can’t obviously decrease the FCG rate, which were examined objectively by the test results from literature.

Effect of temperature on the fatigue-crack growth behavior of the high-entropy alloy CrMnFeCoNi

2017 ◽  
Vol 88 ◽  
pp. 65-72 ◽  
Author(s):  
Keli V.S. Thurston ◽  
Bernd Gludovatz ◽  
Anton Hohenwarter ◽  
Guillaume Laplanche ◽  
Easo P. George ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Behavior ◽  
Effect Of Temperature ◽  
Crack Growth Behavior ◽  
High Entropy Alloy ◽  
Fatigue Crack Growth Behavior ◽  
High Entropy

Fatigue Crack Propagation in 8- and 22-Layer 7075-T6 Aluminum Alloy Laminates

1978 ◽  
Vol 100 (1) ◽  
pp. 32-38 ◽  
Author(s):  
N. J. Pfeiffer ◽  
J. A. Alic
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Crack Growth ◽  
Fatigue Crack Propagation ◽  
Crack Propagation Rate ◽  
Crack Arrest ◽  
Propagation Rate ◽  
Adhesively Bonded ◽  
Crack Divider ◽  
Crack Growth Rates

Rates of fatigue crack propagation have been determined for adhesively bonded 7075-T6 laminates having a crack divider geometry. Two lamina thicknesses were used, the resulting laminates having either 8 or 22 layers. Crack growth rates were generally within the same range as for monolithic 7076-T6 alloy, and were somewhat slower in the 22-layer laminates than in those with 8 layers. Instances of decreasing crack propagation rate with increasing stress intensity amplitude, as well as of crack arrest, were observed. These are interpreted in terms of interactions between the layers during the progressive transition from a flat mode of crack growth to a slant mode.

scholarly journals Temperature and load-ratio dependent fatigue-crack growth in the CrMnFeCoNi high-entropy alloy

2019 ◽  
Vol 794 ◽  
pp. 525-533 ◽  
Author(s):  
Keli V.S. Thurston ◽  
Bernd Gludovatz ◽  
Qin Yu ◽  
Guillaume Laplanche ◽  
Easo P. George ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Load Ratio ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Ratio Dependent

scholarly journals Small fatigue crack growth in a high entropy alloy

2018 ◽  
Vol 13 ◽  
pp. 1065-1070 ◽  
Author(s):  
Kai Suzuki ◽  
Motomichi Koyama ◽  
Hiroshi Noguchi
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Small Fatigue Crack

Fatigue Crack Propagation Rate in EUROFER 97 Estimated Using Small Specimens

2010 ◽  
Vol 452-453 ◽  
pp. 325-328 ◽  
Author(s):  
Pavel Hutař ◽  
Luboš Náhlík ◽  
Martin Ševčík ◽  
Stanislav Seitl ◽  
Tomáš Kruml ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Crack Propagation Rate ◽  
Fatigue Curve ◽  
Propagation Rate ◽  
Fatigue Crack Propagation Rate ◽  
Growth Data ◽  
Element Analysis ◽  
Eurofer 97

The proposed paper describes fatigue damage evolution in Eurofer 97 reduced activation ferritic-martensitic steel. The short crack growth study was performed on small cylindrical specimens using an MTS 880 servohydraulic machine at constant strain amplitude. Based on the fatigue crack growth data obtained and corresponding 3D finite element analysis Paris law region of the fatigue curve were estimated. The results obtained were compared with standard determination of the fatigue crack growth rate according to ASTM using CT specimens. The presented results can help to transfer experimental data measured on small specimens to large structures and vice versa.

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