Initiation of hydrogen induced cracks at secondary phase particles

Frattura ed Integrità Strutturale

Tim Deseranno¹  Lisa Claeys¹  Aurélie Laureys¹  Margot Pinson¹  Kim Verbeken¹  Tom Depover¹ 

[1] Ghent University, Department of Materials, Textiles and Chemical Engineering, Technologiepark 46, 9052 Zwijnaarde, Belgium;

关键词: Blisters;    hydrogen induced cracking;    particles;    secondary phase;    scanning electron microscopy;   

DOI  :  

来源: DOAJ

【 摘 要 】

The goal of this work is to propose a general mechanism for hydrogen induced crack initiation in steels based on a microstructural study of multiple steel grades. Four types of steels with strongly varying microstructures are studied for this purpose, i.e. ultra low carbon (ULC) steel, TRIP (transformation induced plasticity) steel, Fe-C-Ti generic alloy, and pressure vessel steel. A strong dependency of the initiation of hydrogen induced cracks on the microstructural features in the materials is observed. By use of SEM-EBSD characterization, initiation is found to always occur at the hard secondary phase particles in the materials.

【 授权许可】

Unknown