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http://dx.doi.org/10.7777/jkfs.2022.42.2.77

Effect of Initial Solidification Condition During Directional Solidification on the Grain Growth and the Tensile Properties of Superalloy CM247LC  

Jeong, Jae Jun (Changwon National University)
Kwon, Seok Hwan (Korea Lostwax Co Ltd.)
Jeong, Eui Seok (Korea Lostwax Co Ltd.)
Jo, Chang Yong (Changwon National University)
Lee, Je Hyun (Changwon National University)
Publication Information
Journal of Korea Foundry Society / v.42, no.2, 2022 , pp. 77-82 More about this Journal
Abstract
Initial solidification condition during directional solidification of superalloy CM247LC was controlled with various cooling methods such as insertion of alumina disc or Ni foil or inoculant, and direct pouring of melt onto chill plate. Rapid cooling with direct pouring of melt onto chill plate resulted in generation of many fine grains and precipitation of fine γ' particles, as well as small dendrite arm spacing. Tensile properties of directionally solidified superalloy CM247LC were closely related to microstructure which was governed by initial solidification conditions. Directionally solidified CM247LC with small dendrite arm spacing and fine precipitates showed good tensile properties.
Keywords
Superalloy; Directional solidification; CM247LC; Tensile property and Grain;
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