High strain rate superplasticity in a commercial Al–Mg–Sc alloy

Musin, Fanil; Kaibyshev, Rustam; Motohashi, Yoshinobu; Itoh, Goroh

doi:10.1016/j.scriptamat.2003.10.021

Cited by 119 publications

(79 citation statements)

References 8 publications

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“…Although the superplastic properties of Al-Mg-Sc alloys were studied extensively after ECAP [24,25,28,[32][33][34][35][36][37] and HPT [38][39][40][41], there are only limited studies documenting the mechanical properties of UFG Al-Mg-Sc alloys at ambient temperatures [42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Influence of grain size on the flow properties of an Al-Mg-Sc alloy over seven orders of magnitude of strain rate

Pereira

Wang

Huang

et al. 2017

Materials Science and Engineering: A

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractExperiments were conducted to evaluate the flow properties of an Al-3Mg-0.2Sc alloy both without and with processing using equal-channel angular pressing (ECAP). The initial grain size was ~300 m and this was reduced to ~250 nm by ECAP and then increased to ~600 nm by annealing at 673 K for 10 min. Tests were conducted to determine the mechanical properties over seven orders of magnitude of strain rate from ~10 -4 to ~10 3 s -1 .The results confirm the validity of the Hall-Petch relationship in the material processed by ECAP. Shear banding occurred in the coarse-grained material during dynamic testing but in the ECAP-processed alloy there was only minor grain coarsening. There was evidence for dynamic strain ageing in both the coarse and the ultrafine-grained (UFG) alloy with a transition in flow mechanism at high temperatures from dislocation climb in the coarsegrained material to superplasticity in the UFG alloy.

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Section: Introductionmentioning

confidence: 99%

Influence of grain size on the flow properties of an Al-Mg-Sc alloy over seven orders of magnitude of strain rate

Pereira

Wang

Huang

et al. 2017

Materials Science and Engineering: A

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“…In variants with higher Mg content, HSR-SP has also been recorded, e.g. in Al-6Mg-0.3Sc-0.3Mn, were elongations-to-failure up to 2000% have been observed at 450°C and an initial strain rate of 5.6 10 -2 /s [69]. Those studies also showed that very fine grains are not a sufficient condition to achieve HSR-SP.…”

Section: Gbs the Stress Needed To Activate Dislocation Glide Or Grainmentioning

confidence: 95%

Severe plastic deformation of metals

Verlinden¹

2005

MJoM

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This paper provides an introduction in the field of severe plastic deformation (SPD). First of all the main methods to produce SPD materials are discussed. In the following section, the mechanisms leading to the formation of fine grains are reviewed and the influence of changes in strain path is highlighted. During post-SPD thermal annealing, some typical microstructural changes take place. The influence of SPD and subsequent annealing on strength, ductility and superplastic properties are reviewed. Finally the paper provides a short overview of fatigue resistance and corrosion properties of those materials.

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“…Для такого анализа в качестве примера используем результаты исследований высокоскоростной сверхпла-стичности СМК-сплавов Al−3 wt.%Mg−0.2 wt.%Sc [30] и Al-1570 [31].…”

Section: эффект повышения коэффициентаunclassified

Анализ Изменения Диффузионных Свойств Неравновесных Границ Зерен При Рекристаллизации И Сверхпластической Деформации Субмикрокристаллических Металлов И Сплавов

Чувильдеев¹,

Нохрин²,

Пирожникова³

et al. 2017

Физика Твердого Тела

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Описаны результаты исследований эффекта повышения коэффициента зернограничной диффузии при рекристаллизации и сверхпластической деформации субмикрокристаллических (СМК) материалов, полученных методами интенсивного пластического деформирования. Показано, что коэффициент зернограничной диффузии СМК-материалов зависит от интенсивности потока решеточных дислокаций, величина которого пропорциональна скорости миграции границ зерен при отжиге СМК-металлов или скорости внутризеренной деформации в условиях сверхпластической деформации СМК-сплавов. Установлено, что при высокой скорости миграции границ зерен или повышенных скоростей сверхпластической деформации интенсивность потока решеточных дислокаций, бомбардирующих границы зерен СМК-материала, превосходит интенсивность их диффузионной аккомодации, что приводит к увеличению коэффициента зернограничной диффузии и снижению энергии активации. Результаты численных расчетов сопоставлены с экспериментальными данными. Показано их хорошее согласие. Работа выполнена при поддержке РФФИ (гранты N 15-03-08969, 15-08-09298) и частичной поддержке Министерства образования и науки РФ (проект N 2014/134 в рамках государственного задания вузам). DOI: 10.21883/FTT.2017.08.44759.420

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High strain rate superplasticity in a commercial Al–Mg–Sc alloy

Cited by 119 publications

References 8 publications

Influence of grain size on the flow properties of an Al-Mg-Sc alloy over seven orders of magnitude of strain rate

Influence of grain size on the flow properties of an Al-Mg-Sc alloy over seven orders of magnitude of strain rate

Severe plastic deformation of metals

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