A Transition from Eutectic Growth to Dendritic Growth Induced by High Undercooling Conditions

Yong-jun, LU; Wei, B.

doi:10.1088/0256-307x/20/8/358

Cited by 9 publications

(1 citation statement)

References 12 publications

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“…However, the microstructure, located in location III, showed mixed structure of coarse network structure γ -Al 12 Mg 17 and irregular phase α-Mg in Al/Mg friction welding experiment. Cooling rate (about 100°C s −1 in this experiment) has a significant impact on the morphology of the eutectic structure [16,17]. Jackson and Hunt [18] concluded that the growth of eutectic structure depended on the atoms diffusion.…”

Section: Formation Mechanism Of Network Structure In Location IIImentioning

confidence: 70%

The constitutional liquation at the interface of Al/Mg friction welding joints

Liang

Qin

et al. 2017

Science and Technology of Welding and Joining

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Constitutional liquation occurred at the friction interface of Al/Mg joints produced by continuous drive friction welding. This paper investigated the relationship between constitutional liquation and microstructure morphology of Al/Mg joints. The intermetallic compound γ -Al 12 Mg 17 underwent morphological transitions from submicron-size particles to island-like lamellae, then to network structure as the Al content increased. The submicron-size γ -Al 12 Mg 17 particles precipitated along the grain boundaries of α-Mg solid solution. The Mg-Al 12 Mg 17 divorced eutectic structure was formed. The formation mechanism of eutectic structure was studied with Al-Mg binary phase diagram and Al-Mg-Zn ternary phase diagram. The network structure was derived from dendritic structure γ -Al 12 Mg 17 . Friction pressure could improve the liquid-solid hybrid microstructure morphology at the welding interface.

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Section: Formation Mechanism Of Network Structure In Location IIImentioning

confidence: 70%