Comparison of Hydrogen Embrittlement Susceptibility of Different Types of Advanced High-Strength Steels

This study investigated the hydrogen embrittlement (HE) characteristics of advanced high-strength steels (AHSSs). Two different types of AHSSs with a tensile strength of 1.2 GPa were investigated. Slow strain rate tests (SSRTs) were performed under various applied potentials (E ) to identify the mec...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2022-05, Vol.15 (9), p.3406
Main Authors: Cho, Sangwon, Kim, Geon-Il, Ko, Sang-Jin, Yoo, Jin-Seok, Jung, Yeon-Seung, Yoo, Yun-Ha, Kim, Jung-Gu
Format: Article
Language:English
Subjects:
Aluminum alloys
Carbon
Corrosion potential
Cracks
Ductility
Electrodes
Elongation
Energy efficiency
Grain boundaries
High strength steels
Hydrogen
Hydrogen embrittlement
Magnesium alloys
Mechanical properties
Microscopy
Propagation
R&D
Research & development
Slow strain rate
Steel
Strain analysis
Tensile strength
Thermal desorption spectroscopy
Trapping
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study investigated the hydrogen embrittlement (HE) characteristics of advanced high-strength steels (AHSSs). Two different types of AHSSs with a tensile strength of 1.2 GPa were investigated. Slow strain rate tests (SSRTs) were performed under various applied potentials (E ) to identify the mechanism with the greatest effect on the embrittlement of the specimens. The SSRT results revealed that, as the E increased, the elongation tended to increase, even when a potential exceeding the corrosion potential was applied. Both types of AHSSs exhibited embrittled fracture behavior that was dominated by HE. The fractured SSRT specimens were subjected to a thermal desorption spectroscopy analysis, revealing that diffusible hydrogen was trapped mainly at the grain boundaries and dislocations (i.e., reversible hydrogen-trapping sites). The micro-analysis results revealed that the poor HE resistance of the specimens was attributed to the more reversible hydrogen-trapping sites.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15093406