The Ways of Reaching the Specified Mode of Testing Samples for Torsion with Variable Strain Rate

Abstract:

The paper is devoted to the practical implementation of the new torsion testing method for studying rheological properties of materials in a hot state. This method involves the testing of cylindrical samples in the grips of a test setup, the angular velocity of which changes exponentially. The testing mode allows you to restore the hardening curves of a material according to the test results. This article aims to formulate the requirements for possible ways to implement the proposed testing method, and presents two different ways to obtain the specified exponential testing mode. The experience of their use on the test setup in the Ural Federal University indicates the feasibility of the new testing method, as well as the possibility of a smooth transition to the specified testing mode.

• Periodical: Materials Science Forum (Volume 989)
• Pages: 671-677
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.989.671
• Online since: May 2020
• Authors: Mikhail Erpalov*, Dmitry Pavlov
• Keywords: Flow Stress, Rheological Properties, Strain Rate Hardening, Testing Mode, Torsion Testing, Variable Angular Velocity, Variable Strain Rate

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