Metallic materials - Small punch test method

2021 ◽  
Keyword(s):  
Test Method ◽  
Metallic Materials ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Small Punch Testing - The Transition from a Code of Practice to a European Testing Standard

2017 ◽  
Vol 734 ◽  
pp. 3-22 ◽  
Author(s):  
Karel Matocha ◽  
Roger Hurst
Keyword(s):  
Mechanical Properties ◽  
Test Method ◽  
Metallic Materials ◽  
Small Punch Test ◽  
Test Technique ◽  
Small Punch ◽  
Code Of Practice ◽  
Punch Test ◽  
Early Results ◽  
Miniature Testing

The development and practical use of the Small Punch test technique for the evaluation of mechanical properties of metallic materials in Europe resulted in the publication of the CEN document CWA 15627 Small Punch Test Method for Metallic Materials in 2007. The evaluation of the actual mechanical properties of metallic materials from the results of such tests according to CWA 15627 were presented at the first three International conferences SSTT "Determination of Mechanical Properties by Small Punch and other Miniature Testing Techniques" held in Ostrava (2010, 2012) and Castle Seggau in Austria (2014). In the present paper the motivation and the steps taken to lead to the setting up of a working group and programme facilitating the transformation of CWA 15627 Small Punch Test Method for Metallic Materials into an EN standard are summarized along with early results of the programme.

Improved correlation for elastic modulus prediction of metallic materials in the Small Punch Test

2017 ◽  
Vol 134 ◽  
pp. 112-122 ◽  
Author(s):  
José Calaf Chica ◽  
Pedro Miguel Bravo Díez ◽  
Mónica Preciado Calzada
Keyword(s):  
Elastic Modulus ◽  
Metallic Materials ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

European Standard on Small Punch Testing of Metallic Materials

2017 ◽  
Author(s):  
Matthias Bruchhausen ◽  
Tim Austin ◽  
Stefan Holmström ◽  
Eberhard Altstadt ◽  
Petr Dymacek ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Test Methods ◽  
Test Method ◽  
Life Extension ◽  
Tensile Fracture ◽  
Metallic Materials ◽  
Destructive Testing ◽  
Small Punch ◽  
Punch Test

Life extension of aging nuclear power plant components requires knowledge of the properties of the service-exposed materials. For instance, in long term service the tensile and creep properties might decline and the ductile-to-brittle transition temperature (DBTT) might shift towards higher temperatures. Monitoring of structural components in nuclear power plants receives much attention — in particular in the context of lifetime extension of current plants, where the amount of material available for destructive testing is limited. Much effort has therefore been invested in the development of miniature testing techniques that allow characterizing structural materials with small amounts of material. The small punch (SP) test is one of the most widely used of these techniques. It has been developed for nuclear applications but its use is spreading to other industries. Although the SP technique has been used for more than 30 years, there is currently no standard covering its most widely used applications. Within the auspices of ECISS TC 101 “Test methods for steel (other than chemical analysis)” WG 1 is currently developing an EN standard on the “Small Punch Test Method for Metallic Materials”. The standard will address small punch testing for the determination of tensile/fracture properties as well as small punch creep testing. This paper gives an overview of the state-of-the art of the SP tests and describes the scope of the standard under development.

Application of the small punch test to determine the fracture toughness of metallic materials

2012 ◽  
Vol 35 (5) ◽  
pp. 441-450 ◽  
Author(s):  
E. CÁRDENAS ◽  
F. J. BELZUNCE ◽  
C. RODRÍGUEZ ◽  
I. PEÑUELAS ◽  
C. BETEGÓN
Keyword(s):  
Fracture Toughness ◽  
Metallic Materials ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test

Study of Fatigue Properties of Materials through Cyclic Automated Ball Indentation and Cyclic Small Punch Test Methods

2017 ◽  
Vol 734 ◽  
pp. 273-284 ◽  
Author(s):  
Raghu V. Prakash
Keyword(s):  
Fatigue Property ◽  
Test Method ◽  
Life Assessment ◽  
Remaining Life ◽  
Small Punch Test ◽  
Small Punch ◽  
Punch Test ◽  
Ball Indentation ◽  
Fatigue Data ◽  
Cycles To Failure

One of the important inputs while estimating the remaining life of critical components is the fatigue property of materials. Fatigue data, in the form of stress vs. cycles to failure (or) strain vs. cycles to failure (or) fatigue crack growth rate data is used to predict the residual life. Material’s fatigue property degrades with time and usage; hence, it is appropriate to use the current properties for remaining life assessment. Often the quantity of material available for generating fatigue data is limited, especially, if the material is scooped out of existing component of a power plant. Further, fatigue response being probabilistic in nature, requires multiple specimens to be tested at any given stress/strain levels. This has prompted us to develop test procedures to determine the fatigue data of materials from a limited volume of material. This paper presents the results of cyclic ball indentation test method as well as cyclic small punch test method that is used to generate the fatigue data at different stress levels. There are several fine details relating to these test techniques – viz., establishing a equivalent damage criteria for failure life with standard LCF/HCF test specimens. The influence of one of the variables, viz., friction at the specimen-tool interface of a small punch test is investigated through numerical simulation and the results are presented here.

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.

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