Versatile fluidity test model for cast superalloys and comparison between IN718 and IN939

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-09-01 DOI:10.1016/S1003-6326(24)66582-9

Jun ZHANG , Zi-qi JIE , Miao-nan LIU , Min GUO

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Abstract

A spiral fluidity test model of superalloys with 10 mm in height and 3 mm in thickness was designed to evaluate the fluidity of two distinct Ni-based superalloys IN718 and IN939. The factors influencing fluidity are ascertained through comparative analysis utilizing methodologies such as JMatPro, differential scanning calorimetry and high-temperature confocal laser scanning microscopy. The results show that under identical testing conditions, the fluidity of the IN939 superalloy surpasses that of the IN718 superalloy. When subjected to the same temperature, the melt viscosity and surface tension of IN939 superalloy are considerably reduced relative to those of IN718 superalloy, which is beneficial to improving the melt fluidity. Furthermore, the liquidus temperature and solidification range for the IN939 superalloy are both smaller compared with those of the IN718 superalloy. This condition proves advantageous in delaying dendrite coherency, thereby improving fluidity.

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铸造超合金的多功能流动性测试模型以及 IN718 和 IN939 之间的比较

设计了一个高度为 10 毫米、厚度为 3 毫米的超级合金螺旋流动性测试模型，以评估两种不同的镍基超级合金 IN718 和 IN939 的流动性。通过使用 JMatPro、差示扫描量热仪和高温共焦激光扫描显微镜等方法进行比较分析，确定了影响流动性的因素。结果表明，在相同的测试条件下，IN939 超耐热合金的流动性超过了 IN718 超耐热合金。在相同温度下，IN939 超耐热合金的熔体粘度和表面张力都比 IN718 超耐热合金大大降低，有利于提高熔体流动性。此外，与 IN718 超合金相比，IN939 超合金的液相温度和凝固范围都更小。事实证明，这种条件有利于延迟树枝状晶的连贯性，从而改善流动性。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.