2021 Nashville AISTech

Effect of Through-Thickness Microstructural Homogeneity on Fatigue Performance of Structural Steels in Air and Hydrogen Environments (Room 208 B)

29 Jun 21
10:30 AM - 11:00 AM

Tracks: Metallurgy - Processing, Products & Applications: Physical Metallurgy of Steels I

Speaker(s): Douglas Stalheim, President, DGS Metallurgical Solutions Inc.; Andrew Slifka, NIST; Pello Uranga, CEIT and Tecnun (University of Navarra); Enrico Lucon, NIST; Dong-Hoon Kang, Hyundai Steel Technical Research Center

Strength and ductility properties of structural steels for a given microstructure are driven by the average ferrite grain/packet size and by the homogeneity of that ferrite grain/packet size in the final product. Fatigue performance in air for applications of wind towers, bridges, high-rise buildings and in high-pressure gaseous hydrogen for various pipeline systems is critical to the end-use design. To evaluate the effect of through-thickness ferrite grain size and homogeneity on fatigue performance, samples with differences in average ferrite grain size and homogeneity were produced and fatigue tested in both air and high-pressure gaseous hydrogen.