Tensile Fracture of the Welded Joints of Austenitic High-Nitrogen 05Kh22AG16N8M Steel with Various Nitrogen Contents

• Published in: Russian metallurgy Metally Vol. 2021; no. 10; pp. 1299 - 1303
• Main Authors: Blinov, V. M., Lukin, E. I., Blinov, E. V., Samoilova, M. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2021; Springer Nature B.V
• Subjects: Applied Problems of Strength and Plasticity; Austenitic stainless steels; Chemistry and Materials Science; Delta ferrite; Electron microscopes; Materials Science; Metallic Materials; Nitrogen; Sigma phase; Steel structures; Welded joints; phase composition; plasticity; strength; austenitic corrosion-resistant nitrogen steel; quenching; impact toughness
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029521100074

The сrack growth characteristics are investigated in situ in a scanning electron microscope column during the tension of the welded joints of two-phase (γ + δ) and single-phase (γ) 05Kh22AG16N8M steel containing 0.36 and 0.52 wt % N, respectively. A crack in the steel with 0.36% N and its welded joint is shown to form and develop at a low load and strain due to the existence of the σ phase in the steel structure and δ ferrite in the welded joint.