Experimental and Numerical Analysis of Hydrogen-Induced Effects in ASTM A131 and A36 Steels for Naval Fuel Systems
Source abstract
Abstract
Hydrogen embrittlement (HE) can degrade the mechanical integrity of steel pipes, increasing failure risks in naval fuel systems. This study assesses HE effects on ASTM A131 and A36 steels through tensile testing and numerical modeling. Tests conducted with varying exposure times to hydrogen revealed that A131 outperformed A36 in terms of mechanical strength. However, both materials experienced property degradation after six hours. After nine hours, a transient increase in strength occurred, due to temporary microstructural hardening, though the overall trend remained a decline. The maximum reductions in ultimate tensile strength and toughness were 19% and 47% for A131 and 39% and 61% for A36, respectively. Additionally, microstructural analysis revealed the presence of inclusions, intergranular decohesion and micro-crack, in specimens exposed for longer periods. Finally, a combined GTN-PLNIH numerical model was implemented, demonstrating its effectiveness in predicting the mechanical behavior of structures exposed to hydrogen.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Material Properties and Failure Mechanisms · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Escuela Superior Politécnica del Litoral, ESPOL Polytechnic University, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, Guayaquil 090112, Ecuador
PhD Program in Naval and Industrial Engineering, Escola Politécnica de Enxeñaría de Ferrol, Universidade da Coruña, Campus Esteiro, 15403 Ferrol, Spain
Escola Politécnica de Enxeñaría de Ferrol, Centro de Investigación en Tecnologías Navales e Industriales, Campus Industrial de Ferrol, Universidade da Coruña, Campus Esteiro, 15403 Ferrol, Spain
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