Mechanical Properties of σ-Phase and Its Effect on the Mechanical Properties of Austenitic Stainless Steel
Source abstract
Abstract
In this present paper, the mechanical properties of σ-phase and its effect on the mechanical properties of 304H austenitic stainless steel after servicing for about 8 years at 680–720 °C were studied by nano-indentation test, uniaxial tensile test, and impact test. The results showed that the nano-hardness (H), Young’s modulus (E), strain hardening exponent (n), and yield strength (σy) of σ-phase were 14.95 GPa, 263 GPa, 0.78, and 2.42 GPa, respectively. The presence of σ-phase increased the hardness, yield strength, and tensile strength, but greatly reduced the elongation and impact toughness of the material.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals
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Affiliations
School of Mechanical and Power Engineering, Nanjing TECH University, No. 30 Puzhu South Road, Nanjing 211816, China
Jiangsu Key Lab of Design and Manufacture of Extreme Pressure Equipment, Nanjing 211816, China
Nanjing Bolier and Pressure Vessel Inspection Institute, Nanjing 210019, China
Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada
Funding
National Key Research & Development (R&D) Program of China · Postgraduate Research & Practice Innovation Program of Jiangsu Province (College Project)
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