A Review of Experimental Studies of Creep and Creep Rupture Strength (2004-2021 Years)

V. V. Nazarov

doi:10.17804/2410-9908.2022.1.038-051

V. V. Nazarov

A REVIEW OF EXPERIMENTAL STUDIES OF CREEP AND CREEP RUPTURE STRENGTH (2004-2021 YEARS)

DOI: 10.17804/2410-9908.2022.1.038-051

The paper reviews studies conducted between 2004 and 2021 for various metal materials (magnesium-lithium alloy, copper, aluminum alloy, titanium alloy, steel, nickel alloy) in the temperature range from 20 to 1100 °C. In those studies the test results were obtained for isothermal creep under uniaxial tension and complex stress. The number of such studies is limited. This review does not include studies dealing with the chemical interaction of the environment with a metal material. Among these studies there are little-known and unique results. In one of those studies, the creep of a magnesium-lithium alloy at normal temperature was considered for the first time. In another study, creep curves for heat-resistant steel were supplemented with experimental stress–strain diagrams in a wide range of high temperatures. Another distinctive study, for the characteristic times of the creep process, compares photographs of changes in the microstructure and the creep curve up to the rupture time. The review lists studies that found an ambiguity in the effect of biaxial tension on the rupture time in comparison with uniaxial tension. It enumerates complex equivalent stresses with the possibility of describing the relative difference in the rupture time under uniaxial tension, biaxial tension, and triaxial tension.

Acknowledgement: The work was partially financially supported by the Russian Foundation for Basic Research, grant 20-08-00387.

Keywords: creep, creep rupture, multiaxial tension, equivalent stress

References:

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В. В. Назаров

ОБЗОР ЭКСПЕРИМЕНТАЛЬНЫХ ИССЛЕДОВАНИЙ ПОЛЗУЧЕСТИ И ДЛИТЕЛЬНОЙ ПРОЧНОСТИ (2004–2021 гг.)

Рассмотрены работы 2004−2021 гг. для различных металлических материалов (магниево-литиевый сплав, медь, алюминиевый сплав, титановый сплав, сталь, никелевый сплав) в температурном диапазоне 20−1100 °C. В этих работах получены результаты испытаний для изотермической ползучести при одноосном растяжении и сложном напряженном состоянии. Количество таких работ ограничено. В данный обзор не вошли работы, в которых рассмотрено химическое взаимодействие окружающей среды с металлическим материалом. В представленных работах присутствуют малоизвестные и уникальные результаты, впервые рассмотрена ползучесть магниево-литиевого сплава при комнатной температуре, впервые кривые ползучести для жаропрочной стали дополнены экспериментальными диаграммами напряжение – деформация в широком диапазоне значений высокой температуры. Для характерных моментов времени процесса ползучести сделано сопоставление фотоснимков изменения микрострутуры и кривой ползучести до момента времени разрушения. Перечислены работы, в которых из эксперимента по сравнению с одноосным растяжением обнаружена неоднозначность во влиянии двухосного растяжения на время в момент разрушения. В обзоре перечислены сложные эквивалентные напряжения с возможностью описания относительного различия значений времени в момент разрушения при одноосном растяжении, двухосном растяжении и трехосном растяжении.

Благодарность: Работа выполнена при частичной финансовой поддержке Российского Фонда Фун-даментальных Исследований (грант 20−08−00387).

Ключевые слова: ползучесть, длительная прочность, многоосное растяжение, эквивалентное напряжение

Библиография:

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Vicat L. J. Note sur l'allongement progressif du fil de fer soumis a divers tensions // Annales des ponts et chausses – 1834. – P. 40–44.
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Norton F. H. Creep of Steel at high temperatures // New York : Mc. Graw-Hill Book Company, 1929.
Bailey R. W. Creep of steel under simple and compound stresses and the use of high initial temperature in steam power plant // Transactions of the World Power Conference. – Tokyo, 1929. – Vol. 3.
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Nazarov V. V., Lepeshkin A. R. A method for calculating creep limits // Diagnostics, Resource and Mechanics of materials and structures. – 2017. – Iss. 1. – P. 36–42. – DOI: 10.17804/2410-9908.2017.1.036-042 – URL: https://dream-journal.org/DREAM_Issue_1_2017_Nazarov_V.V._et_al._036_042.pdf
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Creep deformation and rupture behaviour of service-exposed super 304H steel boiler tubes / T. T. Nguyen, T. M. Jeong, D. T. Erten, K. B. Yoon // Materials at High Temperatures. – 2021. – Vol. 38, iss. 1. – P. 61–72. – DOI:10.1080/09603409.2020.1830609.
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Библиографическая ссылка на статью

Nazarov V. V. A Review of Experimental Studies of Creep and Creep Rupture Strength (2004-2021 Years) // Diagnostics, Resource and Mechanics of materials and structures. - 2022. - Iss. 1. - P. 38-51. -
DOI: 10.17804/2410-9908.2022.1.038-051. -
URL: http://dream-journal.org/issues/content/article_338.html
(accessed: 21.12.2024).