Investigation of the Mg-Rich Part of the Mg-Dy-Sm Phase Diagram

Lukyanova, E. A.; Рохлин, Л. Л.; Korol’kova, I. G.; Tarytina, I. E.

doi:10.1007/s11669-016-0493-8

Cited by 9 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…, et al, but the results find that their melting points are markedly lower than that of the Al-RE precipitates. The melting points of the abovementioned Mg-RE precipitates are only 545°C 27,28 , 545°C 29 , 535°C 30 , 566°C 31 , 505°C 36 , 750°C 37 , 796°C 37 , 598°C 38 , and 617°C 37 , respectively. All these examples demonstrate that the key to reducing the softening of the heat-affected zone lies in obtaining highly thermodynamically stable Al-RE precipitates.…”

Section: Introductionmentioning

confidence: 94%

Study on the Strengthening Mechanism of Rare-Earth Element Ce on the Laser Welded Joints of Magnesium Alloys

2022

View full text Add to dashboard Cite

The thermomechanical stability of majority precipitates formed by conventional alloying elements in magnesium alloys is generally poor. Hence the morphology and structure of these precipitates are highly susceptible to the welding thermal cycle, which results in the softening of the heat-affected zone (HAZ). Rare-earth (RE) precipitates are generally thermodynamically stable. Therefore, it is necessary to conduct an in-depth discussion on whether RE precipitates reduce the softening of the HAZ. In this paper, Ce-containing magnesium alloy was successfully welded by fiber laser welding. Scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS), and micro-hardness tester were employed to analyze the welded joints. Consequently, the distribution characteristics of RE precipitates in both fusion zone (FZ) and HAZ were revealed. Moreover, based on the solution experiments of the welded joints, the evolution mechanism of the precipitates in welded joints during the thermal cycle was deduced, and the softening mechanism of the HAZ was clarified. Thereafter, the relative intrinsic mechanism of RE precipitates in reducing the softening of the HAZ and improving the mechanical properties of FZ was explored. The results showed that the HAZ was narrow, with a width of only 100-200 μm. The morphology and distribution of the less thermally stable Mg 17 Al 12 precipitated in HAZ changed significantly after the thermal cycle. In contrast, RE precipitates remained stable, which is extremely important for reducing the softening of the HAZ. In addition, the precipitates in FZ were transformed into micron-sized particles and precipitated at the edge of dendrites, resulting in a hardness improvement of the FZ.

show abstract

Section: Introductionmentioning

confidence: 94%

Study on the Strengthening Mechanism of Rare-Earth Element Ce on the Laser Welded Joints of Magnesium Alloys

2022

View full text Add to dashboard Cite

show abstract

“…Mg-Sm-Dy при 500 °С [6] Таблица 1 Механические свойства горячепрессованной плиты сплава ИМВ7-1 при комнатной температуре.…”

Section: рис 5 изотермическое сечение диаграммы состоянияunclassified

Effect of various rare-earth metals in magnesium alloys on their strength properties

Рохлин¹

2020

Journal of «Almaz – Antey» Air and Space Defence Corporation

Self Cite

View full text Add to dashboard Cite

Based on the results of previously published studies, the main laws of the effect of various rare earth metals on the properties of magnesium alloys used as light structural materials are formulated. It is noted that the properties of magnesium alloys containing rare-earth metals are largely determined by their solubility in solid magnesium, which changes successively with an increase in the atomic number of these elements, as well as the tendency to harden during the decomposition of magnesium solid solutions. The possibility of improving the properties of magnesium alloys when doped with various rare-earth metals in a certain ratio is reported, and the examples of such new alloys are provided.

show abstract

“…Часть из них уже изучена. Это диаграммы состояния систем Mg-La-Ce, Mg-Nd-Pr, Mg-Gd-Y, Mg-Sm-Y, Mg-Sm-Gd [14], Mg-Sm-Tb [17], Mg-Dy-Sm [18] и некоторые другие. Обобщение результатов проведенных исследований позволяет сделать вывод, что эти тройные диаграммы состояния имеют общие черты, которые состоят в том, что в равновесии с магниевым твердым раствором в них находятся только две фазы, являющиеся ближайшими к магнию соединениями в прилегающих к магнию двойных системах.…”

Section: рис2unclassified

Prospects for the development of new structural magnesium alloys containing rare earth metals

Рохлин¹,

Lukyanova²,

Tarytina³

2018

Baikov Institute of Metallurgy and Materials Science of RAS — 80 Years. Collection of Scientific Articles

View full text Add to dashboard Cite

Investigation of the Mg-Rich Part of the Mg-Dy-Sm Phase Diagram

Cited by 9 publications

References 13 publications

Study on the Strengthening Mechanism of Rare-Earth Element Ce on the Laser Welded Joints of Magnesium Alloys

Study on the Strengthening Mechanism of Rare-Earth Element Ce on the Laser Welded Joints of Magnesium Alloys

Effect of various rare-earth metals in magnesium alloys on their strength properties

Prospects for the development of new structural magnesium alloys containing rare earth metals

Contact Info

Product

Resources

About