The analysis and comparison of the RF and foreign standards for method of thermomechanical fatigue tests

Gorbovets M.A., Kochetkov D.A., Khodinev I.A.
Gorbovets M.A., Kochetkov D.A., Khodinev I.A. The analysis and comparison of the RF and foreign standards for method of thermomechanical fatigue tests // Proceedings of VIAM. 2017. No. 4. DOI: 10.18577/2307-6046-2017-0-4-11-11. URL: https://test.viam.ru/en/journal/2017/4/11
Keywords
thermomechanical fatigue, low-cycle fatigue (LCF), TMF testing, strain, fatigue, force-controlled, strain-controlled.
Abstract

This paper analyzes the standards GOST 25.505–85 «Calculations and strength tests. Methods of mechanical testing of metals. Test method for thermomechanical low-cycle fatigue» and ASTME 2368-10 «Practice for Strain Controlled Thermomechanical fatigue testing» to get an idea about specifics of carrying out tests for thermomechanical fatigue and identify differences between these standards.

There are no significant differences between the samples of cylindrical forms and sizes of the working parts. Russian standard specifies necessary requirements for manufacturing precision of working part of sample. Standard ASTME 2368-10 contains more stringent requirements to the accuracy of loading and a more detailed description of the test procedure than GOST 25.505–85. The US standard provides guidance and refers to the practical guidance on calibration of measuring systems.

The existing state standard GOST 25.505–85 needs substantial improvement in accordance with modern requirements.

Work is performed within realization of the complex scientific 2.2. «Qualifications and research of materials» («The strategic directions of development of materials and technologies of their processing for the period till 2030») 

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