Experimental Investigation on Eutectic Fraction in Single Crystal Castings of Superalloy CMSX– 4 and DD419

ZHAO Yunxing; YUAN Yingying; MA Dexin; XU Weitai; XU Fuze; WEI Bing

doi:10.16080/j.issn1671-833x.2022.17.074

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Experimental Investigation on Eutectic Fraction in Single Crystal Castings of Superalloy CMSX– 4 and DD419

更新时间：2025-10-30

- Experimental Investigation on Eutectic Fraction in Single Crystal Castings of Superalloy CMSX– 4 and DD419
- Aeronautical Manufacturing Technology Vol. 65, Issue 17, Pages: 74-80(2022)
- 作者机构：
  
  1. 中南大学粉末冶金研究院,长沙,410083
  2. 深圳市万泽中南研究院有限公司,深圳,518045
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2022.17.074
  CLC：
- Published：2022
- 稿件说明：
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赵运兴，员莹莹，马德新，徐维台，徐福泽，魏冰. 高温合金CMSX–4和DD419单晶铸件中共晶含量的试验研究[J]. 航空制造技术, 2022, 65(17): 74-80.

ZHAO Yunxing，YUAN Yingying，MA Dexin，XU Weitai，XU Fuze，WEI Bing . Experimental Investigation on Eutectic Fraction in Single Crystal Castings of Superalloy CMSX– 4 and DD419[J]. Aeronautical Manufacturing Technology, 2022, 65(17): 74-80.
赵运兴，员莹莹，马德新，徐维台，徐福泽，魏冰. 高温合金CMSX–4和DD419单晶铸件中共晶含量的试验研究[J]. 航空制造技术, 2022, 65(17): 74-80. DOI： 10.16080/j.issn1671-833x.2022.17.074.

ZHAO Yunxing，YUAN Yingying，MA Dexin，XU Weitai，XU Fuze，WEI Bing . Experimental Investigation on Eutectic Fraction in Single Crystal Castings of Superalloy CMSX– 4 and DD419[J]. Aeronautical Manufacturing Technology, 2022, 65(17): 74-80. DOI： 10.16080/j.issn1671-833x.2022.17.074.

摘要

使用两种第二代镍基高温合金 CMSX– 4 和 DD419 在相同工艺条件下制备相同形状的单晶叶片和试板铸件，检验铸件的铸态和固溶热处理态组织。结果表明，两种合金虽然化学成分相似，但 CMSX– 4 合金铸态组织中的γ/γ′ 共晶分数比 DD419 高出约 39%，固溶热处理后的残余共晶含量也相应更多，存在残余共晶含量超过技术标准的风险。CMSX– 4 合金叶片铸件中共晶组织在不同部位的分布呈现更明显的不均匀性，这些都对单晶叶片的机械性能产生不利影响。

Abstract

Using two types of the second generation superalloys CMSX– 4 and DD419

the single crystal blades and plates with the same shape were produced under the same process conditions. The as-cast and solution heat treated microstructures of the blade castings were detected and analyzed. It was found that the γ/γ ′ eutectic fraction in as-cast structure of CMSX– 4 alloy is about 39% higher than that in alloy DD419

in spite of the similar chemical compositions of the both alloys. After solution heat treatment

the residual eutectic in CMSX– 4 alloy was observed to be higher than that of DD419 alloy

revealing more risk to exceed the technical standard. Besides the significant higher eutectic fraction

CMSX–4 exhibits also more non-uniform distribution of eutectic in different blade positions

so that the mechanical properties of the CMSX–4 castings is further negatively influenced.

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