P044 Small Crack Propagation behavior in Thin Film of Low-Carbon Steel under Mode II Loading

2007 ◽  
Vol 2007 (0) ◽  
pp. 683-684 ◽  
Author(s):  
Tatsunori Taniguchi ◽  
Yosihito Kurosima ◽  
Shoji Harada
Keyword(s):  
Thin Film ◽  
Carbon Steel ◽  
Crack Propagation ◽  
Low Carbon Steel ◽  
Small Crack ◽  
Mode Ii ◽  
Low Carbon ◽  
Propagation Behavior ◽  
Mode Ii Loading ◽  
Crack Propagation Behavior

Fatigue Crack Retardation of Low Carbon Steel in Saltwater

1984 ◽  
Vol 106 (1) ◽  
pp. 38-42 ◽  
Author(s):  
K. Tokaji ◽  
Z. Ando ◽  
T. Kojima
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
High Strength Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Zone Size ◽  
Propagation Behavior ◽  
Crack Propagation Behavior ◽  
Tensile Overload

The crack propagation behavior following the application of a single tensile overload in 3 percent saltwater was examined using a low carbon steel, which has a considerably lower static strength than high strength steel used in previous report. Experiments were carried out under sinusoidally varying loads at a load ratio of 0 and a frequency of 10 Hz, and the effects of saltwater were evaluated by comparing with the result in air and result on high strength steel. A single tensile overload was found to cause delayed retardation, just as it did in air. The overload affected zone size was not affected by saltwater and showed the same value in both environments. This observed trend differed from the result on high strength steel in which the overload affected zone size was larger in 3 percent saltwater than in air, and thus it was found that the effect of saltwater on retardation behavior was different even in the similar steels. Retardation cycles were smaller in 3 percent saltwater than in air. Since the overload affected zone size was not affected by saltwater, the decrease in retardation cycles was attributed to the higher rates of fatigue crack propagation in 3 percent saltwater. Thinner specimen showed stronger retardation than thicker one. The behavior at midthickness of thicker specimen showed delayed retardation as well as the result in air. Moreover, the crack propagation behavior following the application of a single tensile overload in 3 percent saltwater was well explained by the crack closure concept.

Development of damage in low-carbon steel under mode I and mode II loading conditions

2011 ◽  
Vol 2011 (9) ◽  
pp. 837-843
Author(s):  
L. R. Botvina ◽  
A. P. Soldatenkov ◽  
M. R. Tyutin
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Mode I ◽  
Mode Ii ◽  
Loading Conditions ◽  
Low Carbon ◽  
Mode Ii Loading

Propagation Behavior of Naturally Initiated Small Crack in Austenitic Heat Resistant Steel under Thermo-Mechanical Fatigue Loading

2013 ◽  
Vol 577-578 ◽  
pp. 373-376
Author(s):  
Yasuhiro Yamazaki ◽  
Wataru Fujiki ◽  
Yutaro Hara
Keyword(s):  
Growth Rate ◽  
Crack Propagation ◽  
High Growth ◽  
Fatigue Loading ◽  
High Growth Rate ◽  
Small Crack ◽  
Low Carbon ◽  
Mechanical Fatigue ◽  
Propagation Behavior ◽  
Crack Propagation Behavior

In this paper, the crack propagation behavior of naturally initiated small crack in in low-carbon/medium-nitrogen 316 stainless steel under thermo-mechanical fatigue loading was investigated. The experimental results indicated that the importance of the investigation of small crack propagation behavior because the information on the basis of physically long crack growth rate provides a dangerous evaluation on reliability to actual components. The small crack exhibits high growth rate under the In-phase TMF loading because of irreversible creep and plastic strains. However, the growth rates of small crack under the Out-of-phase TMF loading were lower because the effect of creep deformation became negligible in such condition.

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