PSI - Issue 50

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 50 (2023) 100–104

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers Abstract The resistance of the crystal lattice of 08ps structural steel, AD1 aluminum grade and M1 copper grade to long-term action (9 years) of elastic stresses at different levels of static loads was studied by the X-ray diffraction method. It has been established that the annual ambient temperature variation from - 50°С in winter to +35°С in summer in the period from 2013 to 2022 does not cause significant changes in the characteristics of the diffraction line profiles of the studied materials. The characteristics of the diffraction line profiles obtained in the winter period of observations indicate a slight decrease in instrumental errors due to the experiment design conditions. A systematic change in the resistance of the studied materials crystal lattice to the action of elastic stresses at values of   0.5  0,2 was found. The stepwise process of the occurrence of elementary acts of the crystal lattice reaction in the local zone of X-ray reflection is revealed. This gradation experimentally substantiates the value of the minimum safety factor of materials used in strength calculations of structures. © 202 3 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers. Keywords: steel, aluminum, copper, x-ray diffraction, crystal lattice, elastic-stress state, strength of materials, temperature difference, static loads, long exposure, dissipation of elastic energy. 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Reaction of a crystal lattice of metallic materials to long-term storage in elastic-stressed state Gulyaev V.P. a , Petrov P.P. b , Stepanova K.V. b * a North-Eastern Federal University named after M.K. Ammosov,ul. Belinskogo d.58, Yakutsk 677007, Russia b Larionov Institute of Physical-Technical Problems of the North SB RAS", ul.Oktyabrskaya d.1, Yakutsk 677980, Russia

* Corresponding author. Tel.:+7 -914-274-4859. E-mail address: uekztddg@mail.ru

2452-3216 © 202 3 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers 10.1016/j.prostr.2023.10.027