Fatigue Crack Growth Of SA508 C1.3 Pressure Vessel Steel
In High-temperature Argon And Water Environments
Author(s)
I.S. Kim, S.G. Lee & H.C. Cho
Abstract
Fatigue crack growth of SA508 C1.3 pressure
vessel steel in high-temperature argon and
water environments
I.S. Kim, S.G Lee & H.C. Cho
Korea Advanced Institute of Science and Technology, South Korea
Abstract
Effects of environment on the fatigue crack growth rate were studied. The
hydrogen-charged SA508 C1.3 was tested at 288OC to determine the effect of
hydrogen on environmentally assisted cracking (EAC) in high-temperature
water. The growth rate with the H-charged specimen was enhanced by 2-3 times
that of the as-received specimen under the same environment and loading
conditions. Then the fracture surface revealed a striationless cleavage-like
fracture showing few secondary cracks and striations. The fracture path of the
enhanced crack growth was related to banitic lath boundaries. The data reflected
that hydrogen in steel can actually be involved in the occurrence of the
environmentally assisted cracking.
1 Introduction
In a high-temperature water environment, the fatigue crack growth beh
Keywords
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