Changes in tensile properties and serration of Al-5mass% and 10mass%Mg binary alloys with aging treatment.

大洲, 金; 栄浩, 中山; 徹也, 鷹合; 義富, 小野田

doi:10.2464/jilm.48.148

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…Based on the results of X-ray diffraction and other analyses on the sample aged at 453 K, Jin et al consider that the metastable phase (¢A phase) precipitated in the Al-10 mass%Mg alloy and the stable phase (¢ phase) precipitated in the Al-5 mass%Mg alloy, and that the proof stress increased due to the precipitation strengthening in the former, while the proof stress decreased with the decrease in the solid solution Mg in the latter. 6) Generally, the metastable phase is thought to precipitate in the state of high supersaturation (high solute concentration and low temperature), and in the range of Mg addition (below about 5 mass%), which is the subject of this study, the precipitation strengthening hardly occurs because the stable phase of the ¢ phase mainly precipitates as described in the previous paper.…”

Section: Introductionmentioning

confidence: 80%

“…It has been reported that the strengthening effect due to age hardening is observed in the Al-10 mass% Mg alloy, but hardly observed in the Al-5 mass%Mg alloy. 6) This is considered to be due to the fact that the types of precipitates by aging differed with the Mg concentration. Based on the results of X-ray diffraction and other analyses on the sample aged at 453 K, Jin et al consider that the metastable phase (¢A phase) precipitated in the Al-10 mass%Mg alloy and the stable phase (¢ phase) precipitated in the Al-5 mass%Mg alloy, and that the proof stress increased due to the precipitation strengthening in the former, while the proof stress decreased with the decrease in the solid solution Mg in the latter.…”

Section: Introductionmentioning

confidence: 99%

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Effects of B Addition on Precipitation Behavior of β Phase in Al–Mn–Mg–B Alloys

Shinozaki,

Shimojo,

Shinya

et al. 2023

Mater. Trans.

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In order to investigate the effect of boron on the precipitation behavior of ¢ phase in Al-Mn-Mg-B alloy used as a material for cask baskets, 1.00 © 10 4 hours aging treatment was carried out focusing on the temperature history in the cask as in the previous report, and the Timetemperature-precipitation diagram and Supersaturation-diffusion length-precipitation diagram were evaluated using the change tendency of the specific resistance obtained. In the Al-Mn-Mg-B alloy, although grain refinement by AlB 2 was confirmed, the effect of boron addition on the precipitation rate of ¢ phase was hardly recognized. That is to say, it was confirmed that the grain boundary and the interface between B compounds and matrix phase hardly contributed as nucleation sites of ¢ phase. In conclusion, it is considered that the reduction of the solid solution Mg content in the Al-Mn-Mg-B alloy does not occur even after 60 years if the Mg content is 1.0 mass% as in the Al-Mn-Mg alloy.

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Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Effects of B Addition on Precipitation Behavior of β Phase in Al–Mn–Mg–B Alloys

Shinozaki,

Shimojo,

Shinya

et al. 2023

Mater. Trans.

View full text Add to dashboard Cite

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Effects of Precipitation State on Serrated Flow in Al-Mg(-Zn) Alloys

et al. 2016

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The effects of the aging conditions on the serrated ow in Al-Mg(-Zn) alloys were investigated, focusing on the precipitation states. Al6%Mg and Al-6%Mg-3%Zn alloys were naturally and arti cially aged after solution treated and quenched. The serrated ow was examined by tensile test. As for the Al-6%Mg-3%Zn alloy, the naturally aged specimens show the increase in the critical strain for serrated ow. The Zn-Mg clusters are formed during natural aging. Furthermore, the increase in the number density and the size of these clusters corresponds to the increases in the critical strain, which reveals that the formation of these coherent clusters is one of the dominant factors for delaying the onset of serrated ow. On the other hand, as for the arti cially aged specimens in the under-aged conditions, the transformation of the clusters to the incoherent meta-stable precipitates brings about the decrease in the critical strain. Furthermore, the increase in the volume fraction of these precipitates in the over-aged conditions reduce the stress amplitude of serrated ow, which are brought about by the decrease in the solute Mg content.

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