scholarly journals Current status of the small punch test standardization within the ASTM

2018 ◽  
Vol 1 (S1) ◽  
pp. 34 ◽  
Author(s):  
R. Kopriva ◽  
M. Brumovsky ◽  
P. Petelova

Author(s):  
Milan Brumovsky ◽  
Radim Kopriva

Small punch test specimens are widely used for a long time as they are simple to produce and requires only a small volume of material. This fact is advantageous especially for high activity materials but also for assessment of operational damage in components materials when component integrity and strength may not be affected. In the same time, no test standard exists and several different specimen types and test procedures have been developed in different place. Thus, to unify this activity, considerable attention has been paid since 2012 to the standardization of small punch test technique within the American Society of Testing and Materials (ASTM). In 2016 a large InterLaboratory Study has been launched within the ASTM subcommittee E10.02 - Behavior and Use of Nuclear Structural Materials, involving 12 laboratories and 6 evaluated structural materials from the nuclear and non-nuclear power plant components. Paper describes the current status of ASTM standardization, results of the InterLaboratory Study, first analysis of the results with respect to some important test parameters, lessons learned and open questions remaining to be solved for the successful completion of the standardization process.



2005 ◽  
Vol 47 (1-2) ◽  
pp. 45-54 ◽  
Author(s):  
Meinhard Kuna ◽  
Martin Abendroth


2021 ◽  
Vol 113 ◽  
pp. 102961
Author(s):  
Thanh Tuan Nguyen ◽  
Jong Seo Park ◽  
Seung Hoon Nahm ◽  
Un Bong Beak


2021 ◽  
Vol 87 ◽  
pp. 104211
Author(s):  
Jong-Min Lee ◽  
Jin-Ha Hwang ◽  
Yun-Jae Kim ◽  
Jin-Weon Kim


2021 ◽  
Vol 153 ◽  
pp. 103696
Author(s):  
Jose Calaf-Chica ◽  
Mario Sánchez Palomar ◽  
Pedro Miguel Bravo Díez ◽  
Mónica Preciado Calzada


2021 ◽  
Vol 557 ◽  
pp. 153263
Author(s):  
V.D. Vijayanand ◽  
M. Mokhtarishirazabad ◽  
Y. Wang ◽  
M. Gorley ◽  
D.M. Knowles ◽  
...  


Author(s):  
Bo Cao ◽  
Shiguma Yoshida ◽  
Takeshi Iwamoto ◽  
Hang Thi Pham


2015 ◽  
Vol 830-831 ◽  
pp. 191-194
Author(s):  
M. Venkateswara Rao

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.



2016 ◽  
Vol 86 ◽  
pp. 117-123 ◽  
Author(s):  
David Andrés ◽  
Petr Dymáček


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