Energy Accumulation in Steel, in the Conditions of Constant-Amplitude

Abstract:

This work presents results of fatigue tests of P91 steel specimens under constant-amplitude and programmed loading in temperature T=600°C. Two strain levels, applied in different order, were used for programmed loading. The loading program level changes were introduced for different levels of damage. The tests provided the basis for analysis of strain energy ΔW_pl in the function of the number of load cycles under constant-amplitude and programmed loading. It has been found that that the form of a loading program has an influence on the life and value of energy cumulated in the specimen until crack initiation. Verification of Palmgren Miner hypothesis revealed that its effectiveness depends on the loading program and temperature.

• Periodical: Solid State Phenomena (Volume 240)
• Pages: 114-121
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.240.114
• Online since: August 2015
• Authors: Stanisław Mroziński, Michał Piotrowski*
• Keywords: Energy Cumulation, Low Cycle Fatigue, Plastic Strain Energy

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