Diffusion and Critical Hydrogen Content of Carbon Steels with Different Strengths and Microstructures
Year: 2025
Type: article
Abstract: Four thermomechanically rolled carbon steels with different strength levels and microstructures, namely S355M, X65M, S960M, and S1100M, were selected, and their critical hydrogen contents Hcrit were determined. Hcrit is the hydrogen content where brittle fracture of the steel can occur. The Hcrit values for the four carbon steels are 2.03 (S355M), 0.91 (X65M), 0.32 (S960M), and 0.53 ppm (S1100M). Bainitic carbon steel S1100M outperforms lower-strength tempered martensitic steel S960M in terms of resistance to hydrogen embrittlement. All other steels follow the trend that a higher strength of steel results in a lower resistance to hydrogen embrittlement. The root cause for the beneficial behavior of bainitic steels is discussed.
Source: Materials
DOI: 10.3390/ma19010015
Institutions: Montanuniversität Leoben, Voestalpine (Austria)
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W7116671135