Evaluation of creep rate in high-temperature resistant alloy

Abstract

When the components of an industrial plant are subjected to severe temperature and mechanical stress conditions, they suffer from a plastic deformation that continues over time. This process, known as creep, occurs in petrochemical industries, power generation plants, and oil refineries, where components are used for long periods and exposed to severe service conditions. The objective of this work is to study the creep behavior of nickel high content alloys (Incoloy 800 (30 Ni – 20 Cr), Inconel 601 (60 Ni – 25 Cr), and HP series steels (25 Cr – 35 Ni)) that possess high thermomechanical resistance associated with the internal microstructure of the matrix. The variation of the deformation rate with applied stress and temperature is analyzed; simultaneously, the microstructural evolution is characterized under conditions of temperature and time similar to those in the tests. Experimentally, through creep tests, laboratory conditions similar to service operation conditions will be reproduced. The experimental curves obtained in this way will allow us to understand the variation of physical and mechanical properties, study the mechanisms responsible for the phenomenon, and describe parameters related to the material's mechanical strength.