SEGREGATION BEHAVIOUR OF Mg AT PHASE BOUNDARIES IN AS-CAST SUPERALLOY In100

Acta Metall Sin

1989, Vol. 25

Issue (3): 29-33 DOI:

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SEGREGATION BEHAVIOUR OF Mg AT PHASE BOUNDARIES IN AS-CAST SUPERALLOY In100

ZHU Qiang;WANG Di;GE Honglin;CHEN Guoliang University of Science and Technology Beijing

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ZHU Qiang;WANG Di;GE Honglin;CHEN Guoliang University of Science and Technology Beijing. SEGREGATION BEHAVIOUR OF Mg AT PHASE BOUNDARIES IN AS-CAST SUPERALLOY In100. Acta Metall Sin, 1989, 25(3): 29-33.

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Abstract Electron microprobe technique, Auger electron spectroscopy and EDSanalysis on TEM were used for measuring the phase boundary segregation of Mg ina Ni-base cast superalloy. The results show that Mg segregates to the phase bounda-ries of MC/γand γ′/γ. The thickness of Mg on MC/γ phase boundaries is latgerthan that on γ′/γ phase boundaries. The results prove that Mg is not only a grainboundary segregation element, but also a phase boundary searegation one.

Key words: Mg segregation supperalloy In100

Received: 18 March 1989

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