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Role of crystallographic texture on the improvement of hydrogen-induced crack resistance in API 5L X70 pipeline steel |
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| Authors: | Mohammad Masoumi Cleiton Carvalho Silva Miloslav Béreš Duberney Hincapie Ladino Hamilton Ferreira Gomes de Abreu |
| Affiliation: | 1. Federal University of Ceará, Department of Metallurgical and Materials Engineering, Campus do Pici, Bloco 729, CEP 60.440-554, Fortaleza, Ceará, Brazil;2. University of São Paulo, Department of Metallurgical and Materials Engineering, Av. Prof. Mello Moraes, 2463, 05508-030, São Paulo, SP, Brazil |
| Abstract: | The purpose of this work was to improve the resistance of hydrogen-induced cracking in API 5L X70 steel by engineering the crystallographic texture and grain boundary distributions via different rolling temperatures. Hydrogen-induced cracking and electrochemical hydrogen charging tests were carried out in two different conditions: commercially produced and isothermally rolled at 850 °C in laboratory. The results showed that the development of dominant {011} grains parallel to the normal direction, and a small number of {001}//ND grains obtained by isothermal rolling at 850 °C, increased the hydrogen-induced crack resistance; while the hot rolled sample with sharp {001}//ND textures was highly susceptible to cracking. |
| Keywords: | API 5L X70 Hydrogen-induced cracking Rolling temperature Texture |
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