High-cycle fatigue strength of ultrafine-grained 5483 Al-Mg alloy at low and elevated temperature in comparison to conventional coarse-grained Al alloys

Kamil Majchrowicz , Zbigniew Pakieła , Maciej Giżyński , Maciej Karny , Mariusz Kulczyk

Abstract

This paper presents fatigue behavior of ultrafine-grained (UFG) 5483 Al-Mg alloy processed by hydroextrusion in comparison to its coarse-grained counterpart (CG 5483) and precipitation strengthened CG 7475 alloy. The specimens were tested at low (-50˚C), ambient (25˚C) and elevated (100˚C) temperature in tension-tension (R = 0.1) fatigue under stress control. It was found that the decrease of temperatures leads to a shift of Wöhler curves to higher stress values. Despite of similar YS, UFG 5483 alloy exhibited reduced fatigue strength compared with CG 7475 alloy. The changes in fatigue life were rationalized in terms of lower stability of UFG structure under cyclic loading. UFG 5483 and CG 7475 alloys were susceptible to cyclic softening attributed to fatigue-induced recovery process, whereas CG 5483 exhibited cyclic hardening accompanied by dislocation density increase.
Author Kamil Majchrowicz (FMSE / DMD)
Kamil Majchrowicz,,
- Division of Materials Design
, Zbigniew Pakieła (FMSE / DMD)
Zbigniew Pakieła,,
- Division of Materials Design
, Maciej Giżyński (FMSE)
Maciej Giżyński,,
- Faculty of Materials Science and Engineering
, Maciej Karny (FMSE / DMD)
Maciej Karny,,
- Division of Materials Design
, Mariusz Kulczyk - Instytut Wysokich Ciśnień Polskiej Akademii Nauk (Instytut Wysokich Ciśnień Polskiej Akademii Nauk)
Mariusz Kulczyk,,
-
Journal seriesInternational Journal of Fatigue, ISSN 0142-1123, (A 35 pkt)
Issue year2018
Vol106
Pages81-91
Publication size in sheets0.5
Keywords in PolishMateriały ultradrobnoziarniste; Stopy aluminium; Zmęczenie; Wpływ temperatury; Stabilność cykliczna
Keywords in EnglishUltrafine-grained materials; Aluminum alloys; Fatigue; Temperature effect; Cyclic stability
DOIDOI:10.1016/j.ijfatigue.2017.09.019
URL https://doi.org/10.1016/j.ijfatigue.2017.09.019
Languageen angielski
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High-cycle fatigue strength of ultrafine-grained 5483 Al-Mg alloy at low and elevated temperature in comparison to conventional coarse-grained Al alloys.pdf 2.42 MB
Score (nominal)40
ScoreMinisterial score = 35.0, 20-03-2018, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 20-03-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.899 (2) - 2016=3.024 (5)
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