Influence of fusion zone size and failure mode on mechanical performance of dissimilar resistance spot welds of AISI 1008 low carbon steel and DP600 advanced high strength steel

2011 ◽  
Vol 32 (3) ◽  
pp. 1390-1398 ◽  
Author(s):  
M. Pouranvari ◽  
S.M. Mousavizadeh ◽  
S.P.H. Marashi ◽  
M. Goodarzi ◽  
M. Ghorbani
Keyword(s):  
Carbon Steel ◽  
Fusion Zone ◽  
High Strength Steel ◽  
Mechanical Performance ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Zone Size ◽  
Advanced High Strength Steel ◽  
Resistance Spot Welds

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.

Sign in / Sign up

Export Citation Format

Share Document