OS0111 Healing of Fatigue Crack Treated by Surface-Activated Pre-Coating and Controlling High-Density Electric Current Field

2012 ◽  
Vol 2012 (0) ◽  
pp. _OS0111-1_-_OS0111-2_
Author(s):  
Tomoya KISHI ◽  
Atsushi HOSOI ◽  
Yang JU
Keyword(s):  
Fatigue Crack ◽  
Electric Current ◽  
High Density ◽  
Current Field

Effect of High Density Electric Current Field on Fatigue Cracks in Stainless Steel

2010 ◽  
Author(s):  
A. Hosoi ◽  
T. Nagahama ◽  
Y. Ju
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Electric Current ◽  
Fatigue Cracks ◽  
High Density ◽  
Current Field ◽  
Opening Displacement ◽  
Paris Law ◽  
Propagation Behavior ◽  
Closure Effect

A technique was developed to heal a fatigue crack by controlling a high density electric current field. The high-density electric current field was applied at the tip of the crack by using closely spaced electrodes. It was found that the electric stimulation influences the states and propagation behavior of a fatigue crack in the stainless steel. When the electric current was applied to a specimen having a pre-crack with a large opening displacement, a closure effect at the crack tip was shown and the bridges between the crack surfaces were observed. On the other hand, when the electric current was applied to a specimen having a pre-crack with a small opening displacement, an opening effect was shown. These effects were also evaluated quantitatively by the Paris law.

scholarly journals Delaying Effect of High-Density Electric Current on Fatigue Crack Growth in A6061-T6 Aluminum Alloy

2016 ◽  
Vol 57 (12) ◽  
pp. 2104-2109
Author(s):  
Jaewoong Jung ◽  
Yang Ju ◽  
Yasuyuki Morita ◽  
Yuhki Toku ◽  
Yoshihiko Uematsu
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Electric Current ◽  
Crack Growth ◽  
High Density

S0301-1-4 Effect of high-density electric current field on the slip at the tip of fatigue cracks

2010 ◽  
Vol 2010.1 (0) ◽  
pp. 59-60
Author(s):  
Takahiro Yano ◽  
Takatsugu Nagahama ◽  
Atsushi Hosoi ◽  
Yang Ju
Keyword(s):  
Electric Current ◽  
Fatigue Cracks ◽  
High Density ◽  
Current Field
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