Correlation of Tensile Properties of Pressure Vessel Steels by Shear Punch and Small Punch Test Methods

2012 ◽  
Author(s):  
Raghu V. Prakash ◽  
T. Ramesh ◽  
N. Raju ◽  
S. Suresh
Keyword(s):  
Tensile Properties ◽  
Pressure Vessel ◽  
Test Method ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test ◽  
Nominal Size ◽  
Shear Punch Test ◽  
Pressure Vessel Steels ◽  
Shear Punch

A shear punch test is a very useful small specimen test method for evaluating the mechanical properties of in-service components, in view of the requirements of small size sample material. Typically disks of nominal size 10 mm diameter, having a thickness of 0.5 mm or less is used to extract the tensile properties through measurement of load-displacement responses. This paper presents the results of shear punch tests on pressure vessel steels and its correlation with yield stress and ultimate tensile stress obtained using ASTM standard specimens. Small punch test is similar to shear punch test, except that the indenter is spherical in shape, and as a consequence the material under the punch will be subjected to biaxial state of stress. The tensile response of materials derived by small punch test is correlated with standard tensile tests.

Application of Small Punch Test to Evaluate Tensile Properties of SA213T22 Grade Boiler Steel

2015 ◽  
Vol 830-831 ◽  
pp. 191-194
Author(s):  
M. Venkateswara Rao
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Tensile Properties ◽  
Test Methods ◽  
Uniaxial Tensile ◽  
Test Results ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test ◽  
Aging Phenomena

Conventional tensile test methods are used for service exposed high temperature boiler tubes to evaluate the deterioration in mechanical properties such as tensile strength, yield strength and percentage elongation. The mechanical properties are required to be evaluated periodically as the boiler components undergo material degradation due to aging phenomena. The aging phenomena occurs due to continuous exposure of tubes to high temperature & pressure steam prevailing inside the tubes and high temperature exposure to corrosive combustible gases from the external surfaces within the boiler.A recent developed new technique called small punch testing has been used to evaluate the tensile properties of SA 213T22 grade steel predominantly exists in super-heater and re-heater sections of boiler. The small punch tests have been carried out on the miniature disk shaped specimens of diameter of 8.0 mm and 0.5 mm thickness extracted from both the new and service exposed tubes. Conventional uniaxial tensile tests on standard specimens from the same tube material have also been performed for comparison. The service exposed tubes showed considerable loss in mechanical properties in both the conventional and small punch test results. Correlations of tensile properties have been obtained based on the comparative analysis of both small punch and uniaxial tensile test results. Further, the study showed that an appropriate empirical relation could be generated for new and service exposed materials between both the techniques. Conventional test methods require large quantity of material removal for test samples from in-service components whereas small punch test method needs only a miniature sample extraction. This small punch test technique could also be extended to evaluate the thicker section boiler components such as pipelines and headers in the boiler as a part of remaining life assessment study. Also this technique could be a useful tool to any metallic component where large quantity of sample removal may be difficult or may not be feasible.

Application of Miniature Small Punch Test Specimen in Determination of Tensile Properties

2015 ◽  
pp. 1-8 ◽  
Author(s):  
R. Kopriva ◽  
M. Brumovsky ◽  
M. Kytka ◽  
M. Lasan ◽  
J. Siegl ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Test Specimen ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Evaluating the Mechanical Behavior of ARB Processed Aluminum Composites Using Shear Punch Testing

2020 ◽  
Vol 986 ◽  
pp. 86-92
Author(s):  
Dhyai Hassan Jawad ◽  
Ali Hosseinzadeh ◽  
Mustafa Misirli ◽  
Guney Guven Yapici
Keyword(s):  
Tensile Tests ◽  
Mechanical Analysis ◽  
Test Method ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Punch Test ◽  
Processed Material ◽  
Shear Punch Test ◽  
Shear Punch ◽  
Shear Punch Testing

Multi-layered metal composites have received considerable attention due to their improved mechanical and physical properties. In this study, Al6061/Al2024 composite was processed by accumulative roll bonding (ARB) as a severe plastic deformation technique. Mechanical properties of processed material were evaluated using the uniaxial tensile test and shear punch test method (SPT). The correlation between the results of the tension experiments and shear strengths was calculated. Experimental results demonstrated that the shear strength enhanced with increased number of ARB passes. However, the elongation under shear manifested a reduction when the number of ARB passes increased. Inspection of the results of tensile tests and SPT revealed that they follow a similar trend for both strength and ductility. Therefore, it can be asserted that the shear punch test represents a useful and complementary tool in the mechanical analysis of the ARB sample.

scholarly journals A novel methodology for estimating tensile properties in a small punch test employing in-situ DIC based deflection mapping

2020 ◽  
Vol 538 ◽  
pp. 152260
Author(s):  
V.D. Vijayanand ◽  
M. Mokhtarishirazabad ◽  
J. Peng ◽  
Y. Wang ◽  
M. Gorley ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test
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