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51316-7500-Hydrogen Induced Cracking of A516 Plate Steels and the Apparent Effect of Microscopic Banding

Picture for Hydrogen Induced Cracking of A516 Plate Steels and the Apparent Effect of Microscopic Banding
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Product Number: 51316-7500-SG
ISBN: 7500 2016 CP
Author: Bryan Kulesza
Publication Date: 2016
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Several published papers identified microstructural banding as a factor in susceptibility to hydrogen induced cracking (HIC). In the present study over 50 plates from more than 15 heats of A516-70 steel were analyzed for microstructural characteristics including banding index per ASTM E1268 for chemical composition for HIC behavior per NACE TM0284 and for cleanliness rating per ASTM E45. The correlation between HIC behavior and banding index was weak. Scanning Electron Microscopy analyses of opened HIC cracks was used to identify HIC initiation sites. Non-metallic inclusions and untempered martensite were identified as the sources of high CLR values in HIC tested samples. These microstructural characteristics rather than the banding index per se are significant causes of HIC in pressure vessel steels
Several published papers identified microstructural banding as a factor in susceptibility to hydrogen induced cracking (HIC). In the present study over 50 plates from more than 15 heats of A516-70 steel were analyzed for microstructural characteristics including banding index per ASTM E1268 for chemical composition for HIC behavior per NACE TM0284 and for cleanliness rating per ASTM E45. The correlation between HIC behavior and banding index was weak. Scanning Electron Microscopy analyses of opened HIC cracks was used to identify HIC initiation sites. Non-metallic inclusions and untempered martensite were identified as the sources of high CLR values in HIC tested samples. These microstructural characteristics rather than the banding index per se are significant causes of HIC in pressure vessel steels
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Picture for Hydrogen Induced Cracking of A516 Plate Steels and the Apparent Effect of Microscopic Banding
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51316-7498-Hydrogen Induced Cracking of A516 Plate Steels and the Apparent Effect of Microscopic Banding

Product Number: 51316-7498-SG
ISBN: 7498 2016 CP
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Picture for Analysis of Hydrogen Induced Cracking by in-situ HIC Observation Method
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51318-10665-Analysis of Hydrogen Induced Cracking by in-situ HIC Observation Method

Product Number: 51318-10665-SG
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New in-situ HIC measurement method to make the connection between HIC propagation behavior and microstructure. Based on an automatic ultrasonic wave inspection system and a scanning electron microscopy (SEM) observation.
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03533 Hydrogen Induced Cracking Failure of ASTM A 516 Grade 70 Steel in Near Neutral to High pH Solution Part 2: Laboratory Studies

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