The Evaluation of Tensile Properties at High Temperatures Using a Ring Specimen

Abstract:

In the case of inner pressurized pipe, the hoop stress mainly causes the failure of pipe. For evaluating the hoop tensile properties of pipes, a ring test is used although it has an inevitable shortcoming of disturbance by the bending. Arsene suggested a central piece-inserted ring test for reducing the bending. At high temperatures, the friction between the specimen and the central piece exerts a serious influence on the results, so an effect on friction should be considered in the analysis. In this study, for the evaluation of the hoop properties using the central piece-inserted ring model of Arsene, we performed the ring tensile tests at several temperatures. From the ring tensile tests and numerical analysis the load-displacement conversion relationship of ring specimen (LCRR) was determined. We could obtain the hoop tensile properties by means of applying the LCRR to the results of the ring tensile test. From the result, it was observed that the strength decreased as the temperature increased, and the elongation dropped a little around 400°C.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 440-445
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.440
• Online since: November 2005
• Authors: Chang Sung Seok, Bong Kook Bae, Jae Mean Koo, Jae Sil Park, Yong Huh
• Keywords: Cladding, Friction Coefficient (FC), Load Ratio, Load-Displacement Conversion Relationship for Ring Specimen LCRR, Ring Test, Zirlo

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