Small punch tests to estimate the mechanical properties of steels for steam power plant: I. Mechanical strength

• Published in: The International journal of pressure vessels and piping Vol. 75; no. 9; pp. 699 - 706
• Main Authors: Fleury, E., Ha, J.S.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.1998; Elsevier
• Subjects: Analysing. Testing. Standards; Applied sciences; Bending (deformation); Deflection (structures); Elastic bending; Elasticity; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fractures; Installations for energy generation and conversion: thermal and electrical energy; Installations for industrial steam generation; Load testing; Mathematical models; Measurement of properties and materials state; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Membrane stretching; Metals. Metallurgy; Modeling; Nondestructive testing; Plastic bending; Plastic deformation; Small punch test; Steel testing; Strain; Stress analysis; Tensile testing; Uniaxial tensile test; Plastic bending; Uniaxial tensile test; Elastic bending; Membrane stretching; Modeling; Small punch test; Electric power plant; Stress strain relation; Uniaxial tension stress; Rupture; Mechanical properties; Durability; Steam thermal power station; High temperature; Chromium-molybdenum steels; Experimental study; Low alloy steel; Tension test; Austenitic steel; Ferritic steel; Measurement method; Punching test; Room temperature
• ISSN: 0308-0161; 1879-3541
• DOI: 10.1016/S0308-0161(98)00074-X

Small punch test techniques have been used to evaluate the mechanical properties of components from miniature-sized specimens. Correlations between mechanical characteristics determined from small punch tests and uniaxial tensile tests have been obtained on low alloy steels. Analytical formulations, with an appropriate description of the uniaxial stress–strain behavior, have been used to model the elastic bending, plastic bending and membrane stretching regimes of small punch load–deflection curves. These equations have been applied to austenitic 12Cr–1Mo steel in the temperature range 25–600°C, and have been verified on ferritic 1Cr–0.5Mo steel at ambient temperature. These formulations have also been used to estimate the uniaxial tensile stress–strain behavior of ferritic 2.25Cr–1Mo and AISI 403 steels from experimental small punch load–deflection curves.