Investigation on freckles in directionally solidified CMSX-4 superalloy specimens with abrupt cross section variation
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- 作者：Qiudong Li ; Jun Shen ; shenjun@nwpu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Ling Qin ; Shuxin Gao
- 关键词：Freckle ; Directional solidification ; CMSX-4 ; Abruptly varying cross section
- 刊名：Journal of Alloys and Compounds
- 出版年：2017
- 出版时间：15 January 2017
- 年：2017
- 卷：691
- 期：Complete
- 页码：997-1004
- 全文大小：2752 K
文摘
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Freckles appear at the surface of specimens 2–15 mm above the platform.
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Freckles on both sides are slanted to respective edge.
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The abrupt variation in cross section increases the freckling tendency.
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The concaved solidification interface slants the freckles.
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Freckle formation can be suppressed with increasing withdrawal rate.