CM247LC 초내열합금에서 일방향응고에 따른 응고조직 변화
Directional solidification of CM247LC was performed at a constant growth velocity (300 mm/h) using a Bridgman type furnace. Microstructural features, including the number of grains, PDAS, and EBSD IPF map, were investigated with progressive positions from the starter block. As directional solidifica...
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Published in | 대한금속·재료학회지, 54(11) Vol. 54; no. 11; pp. 838 - 845 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
대한금속재료학회
05.11.2016
대한금속·재료학회 |
Subjects | |
Online Access | Get full text |
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Summary: | Directional solidification of CM247LC was performed at a constant growth velocity (300 mm/h) using a Bridgman type furnace. Microstructural features, including the number of grains, PDAS, and EBSD IPF map, were investigated with progressive positions from the starter block. As directional solidification proceeded, the number of grains decreased and PDAS increased. These results indicate that the thermal gradient decreases with distance from the starter block. Thermal gradient changes were estimated by dendrite spacing change in the directionally solidified rod. The EBSD IPF map showed that almost all of the grains were close to the < 001 > preferred direction, but with heights of about 300 mm from the starter block, some grains at the center of the specimen exhibited quite different crystallographic directions near the gate instead of the preferred direction. (Received October 5, 2015; Accepted May 24, 2016) |
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Bibliography: | The Korean Institute of Metals and Materials G704-000085.2016.54.11.003 |
ISSN: | 1738-8228 2288-8241 |
DOI: | 10.3365/KJMM.2016.54.11.838 |