info:eu-repo/semantics/article
Microalloyed steels through history until 2018: review of chemical composition, processing and hydrogen service
Autor
JULIO CESAR VILLALOBOS BRITO
ADRIAN DEL POZO MARES
Bernardo Campillo
JAN MAYEN CHAIRES
Sergio Alonso Serna
Institución
Resumen
Microalloyed steels have evolved in terms of their chemical composition, processing, and metallurgical characteristics since the beginning of the 20th century in the function of fabrication costs and mechanical properties required to obtain high-performance materials needed to accommodate for the growing demands of gas and hydrocarbons transport. As a result of this, microalloyed steels present a good combination of high strength and ductility obtained through the addition of microalloying elements, thermomechanical processing, and controlled cooling, processes capable of producing complex microstructures that improve the mechanical properties of steels. These controlled microstructures can be severely affected and result in catastrophic failures, due to the atomic hydrogen diffusion that occurs during the corrosion process of pipeline steel. Recently, a martensite–bainite microstructure with acicular ferrite has been chosen as a viable candidate to be used in environments with the presence of hydrogen. The aim of this review is to summarize the main changes of chemical composition, processing techniques, and the evolution of the mechanical properties throughout recent history on the use of microalloying in high strength low alloy steels, as well as the effects of hydrogen in newly created pipelines, examining the causes behind the mechanisms of hydrogen embrittlement in these steels. S.S. and B.C. got the idea and directed the project and review of the final version; J.C.V., A.D.-P. and J.M. wrote the paper. This work was supported by PRODEP [grant number 511-6/17-14378] and for the support in the payment of the costs of publication, CONACyT [grant number 434894]; we want to thank to Ben Church; René Guardian Tapia and Ivan Puente Lee for the support provided in SEM images and Alejandro Sedano Aguilar for the support in the revision of the English grammar of the article.
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