Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

Страумал, А. Б.; Mazilkin, I. A.; Tzoy, Kristina; Straumal, Boris B.; Bryła, Krzysztof; Baranchikov, А. Е.; Eggeler, Gunther

doi:10.3390/met10091127

Cited by 45 publications

(19 citation statements)

References 23 publications

(31 reference statements)

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“…The microstructure after ultrasonic treatment reveals significant difference from the initial state. The shape of the second phase Al 3 Ti has changed, and all the needle-like Al 3 Ti disappeared and become block-like, which is similar to the shape change of the second phase after heat treatment in the Mg-alloy EZ33A described in Ref [51] . Fig.…”

Section: Resultssupporting

confidence: 79%

“…5 b) in the final. The difference to the fraction of covered GBs between S U sample and S K sample confirms the existence of the solid phase GB wetting transition in the Al-Ti-C grain refiner [51] . Similar phenomenon of GBs completely and/or incompletely covered with layers of a second solid phase have been observed also in Al alloys, Cu alloys and Ti alloys et al [52] , [53] , [54] , [55] .…”

Section: Resultssupporting

confidence: 58%

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Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Zhao

Ning

et al. 2021

Ultrasonics Sonochemistry

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Highlights Providing a new method for the preparation of Al-Ti-C grain refiner. The contact angle θ of aluminum-carbon interface is reduced under ultrasonic field. TiC particles are detached from the interface driven by sound pressure, which results that the wetting interface is updated in real time. The wetting and spreading of the aluminum melt on the graphite surface under ultrasonic field are simulated.

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Section: Resultssupporting

confidence: 79%

Section: Resultssupporting

confidence: 58%

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Zhao

Ning

et al. 2021

Ultrasonics Sonochemistry

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“…2a almost fully surrounds the grains of α-Mg phase appearing dark-grey, and separates them from each other. Such behavior is intimately connected with the complete and incomplete wetting of grain boundaries by the melt or second phase [3,32]. With La addition, more LaMg 12 is precipitated.…”

Section: Resultsmentioning

confidence: 99%

“…Magnesium alloys are promising materials in the automotive, electronic, and aviation field because of light weight, high specific strength, outstanding damping performance, and environmental protection [1][2][3]. Thermal conductivity is an important thermophysical properties, and it plays an essential role in the performance of alloy.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

Guo

Liu

Huang

et al. 2021

Metals

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Thermal conductivity and phase identification of Mg-RE (Rare-Earth) alloy (Mg-La, Mg-Ce, Mg-Nd, Mg-Sm) in both as-cast and annealed states were investigated. The thermal conductivity was measured by the laser flash method in the composition range of 4 wt.% to 12 wt.% RE and the temperature range of 298 K to 673 K. Results demonstrated that homogenization treatment can increase its thermal conductivity. The thermal conductivity increases with the increasing temperature in two states, which is inconsistent with the pure magnesium, and the thermal conductivity of Mg-RE alloys decreases with the alloy additions. Compared with the atomic radius, valence, and intermetallic compounds, the solid solubility of the above four RE elements in α-Mg plays a vital role in the thermal conductivity of Mg-RE binary alloy. The reduction of thermal conductivity caused by the addition of Nd and Sm, which show observable solid solubility in α-Mg, is significantly greater than the addition of La and Ce with negligible solid solubility in α-Mg.

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“…The precipitation during quenching was closely associated with the precipitation at grain boundaries and sub-grain boundaries due to their high interfacial energy [ 11 , 15 , 18 , 19 , 20 ]. These boundaries not only facilitate the formation of dispersed phase during casting [ 21 , 22 , 23 ], but are also favorable to heterogeneous nucleation during inadequate quenching. Apart from the effects from the boundaries, quenching induced precipitation can vary with grain structure.…”

Section: Introductionmentioning

confidence: 99%

Precipitation during Quenching in 2A97 Aluminum Alloy and the Influences from Grain Structure

Wang

Jiang

et al. 2021

Materials

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The quench-induced precipitation and subsequent aging response in 2A97 aluminum alloy was investigated based on the systematic microstructure characterization. Specifically, the influence on precipitation from grain structure was examined. The results indicated the evident influence from the cooling rate of the quenching process. Precipitation of T1 and δ′ phase can hardly occur in the specimen exposed to water quenching while become noticeable in the case of air cooling. The yield strength of 2A97-T6 alloy de-graded by 234 MPa along with a comparable elongation when water quenching was replaced by air cooling. Sub-grains exhibited a much higher sensitivity to the precipitation during quenching. The presence of dislocations in sub-grains promoted the quench-induced precipitation by acting as nucleation sites and enhancing the diffusion of the solute. A quenching rate of 3 °C/s is tolerable for recrystallized grains in 2A97 Al alloy but is inadequate for sub-grains to inhibit precipitation. The study fosters the feasibility of alleviating quench-induced precipitation through cultivating the recrystallization structure in highly alloyed Al–Cu–Li alloys.

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Bulk and Surface Low Temperature Phase Transitions in the Mg-Alloy EZ33A

Cited by 45 publications

References 23 publications

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

Precipitation during Quenching in 2A97 Aluminum Alloy and the Influences from Grain Structure

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