Method and apparatus for measuring hydrogen-induced cracking
First Claim
1. An apparatus for measuring hydrogen-induced cracking, which comprises a vessel for housing a test solution containing hydrogen sulfide and immersing a test specimen, an ultrasonic probe placed in the test solution and immersed in the same test solution as the test specimen for transmitting an ultrasonic wave toward the test specimen and receiving a reflection echo from the test specimen, a scanning means for relatively scanning the ultrasonic probe and the test specimen every given time, and a visualizing means for visualizing cracks in the interior of the test specimen based on a signal received from the ultrasonic probe every scanning position.
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Abstract
There are proposed a method for measuring hydrogen-induced cracking which can measure hydrogen-induced cracking initiated in an interior of a test specimen during HIC test and a measuring apparatus used in this method. When cracks initiated in an interior of a test specimen 1 immersed in a test solution 5 containing hydrogen sulfide is measured by an ultrasonic probe 2 placed in a vessel 3, the position and size of cracks initiated in the interior of the test specimen 1 are measured with the lapse of time at a state of immersing the test specimen 1 in the test solution by scanning the ultrasonic probe 2 or the test specimen 1.
18 Citations
20 Claims
- 1. An apparatus for measuring hydrogen-induced cracking, which comprises a vessel for housing a test solution containing hydrogen sulfide and immersing a test specimen, an ultrasonic probe placed in the test solution and immersed in the same test solution as the test specimen for transmitting an ultrasonic wave toward the test specimen and receiving a reflection echo from the test specimen, a scanning means for relatively scanning the ultrasonic probe and the test specimen every given time, and a visualizing means for visualizing cracks in the interior of the test specimen based on a signal received from the ultrasonic probe every scanning position.
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17. A method for measuring hydrogen-induced cracking, the method comprising
immersing a test specimen in a test solution containing hydrogen sulfide inside a vessel; - and
measuring cracks initiated in the interior of the test specimen with an ultrasonic probe, wherein the ultrasonic probe is placed in the vessel and immersed in the same test solution as the test specimen and the test specimen and the ultrasonic probe are relatively scanned every given time to measure a position and size of the cracks initiated in the interior of the test specimen with time at a state of immersing the test specimen in the test solution. - View Dependent Claims (18, 19, 20)
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Specification