Subcritical Crack Growth: Stress Corrosion Cracking and Fatigue Crack Growth (Phenomenology)

2012 ◽  
pp. 103-119
Author(s):  
Robert P. Wei
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Subcritical Crack Growth ◽  
Growth Stress ◽  
Corrosion Cracking

Characteristics of Fatigue Crack Growth and Stress Corrosion Cracking in Aggressive Environments of Aluminum Alloys for Hydrogen Gas Containers

2014 ◽  
Author(s):  
Takeshi Ogawa ◽  
Shota Hasunuma ◽  
Naoki Sogawa ◽  
Taiki Yoshida ◽  
Toshihiko Kanezaki ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Salt Water ◽  
Corrosion Cracking ◽  
Hydrogen Gas ◽  
Nacl Solution ◽  
Humid Air

Hydrogen gas container is one of the critical components for fuel cell electric vehicle (FCEV), which is expected for CO2-free personal transportation. In order to choose an appropriate material for its metal boss and liner, crack growth resistance should be evaluated for various aspects such as fatigue crack growth (FCG) and stress corrosion cracking (SCC) in salt water or humid air environments for the purpose of commercial vehicle use. In the present study, FCG tests were carried out for A6061 and A6066 alloys in laboratory air and in 3.5% NaCl solution for compact (CT) and single edge notched (SEN) specimens. Some SEN specimens were cut from machined hydrogen container made of A6066 at the neck and the shoulder locations. SCC tests were carried out for A6061, A6066 and A6351 (fine and coarse grains) alloys in 3.5% NaCl solution and in humid air for CT specimen.

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