Undercooling and Microstructure of Gas Atomized Ni-based Superalloy Powders

IF 0.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Chen Shiqi , Lu Zhi , Wang Guangxin
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引用次数: 3

Abstract

Atomization is an effective approach to obtain fine and spherical alloy powders. Undercooling is an important factor that can affect the property of powders during atomization. The effects of powder size and cooling rate on the undercooling and microstructure of powders were investigated, and the relation between powder size, cooling rate and undercooling was obtained through DSC. The results show that a small powder size and a low cooling rate will result in a large undercooling. Meanwhile, it is found that when the undercooling is large, the dendrite arm spacing of the particles decreases. The smaller the powder size, the greater the proportion of cellular grains, and the finer the grain size of the powders.

ni基高温合金气体雾化粉末的过冷及显微组织
雾化是制备微细球形合金粉末的有效方法。过冷度是影响粉末雾化性能的一个重要因素。研究了粉末粒度和冷却速度对粉末过冷度和显微组织的影响,并通过DSC得到了粉末粒度、冷却速度和过冷度之间的关系。结果表明,粉末粒度小,冷却速度慢,过冷度大。同时,当过冷度较大时,晶粒的枝晶臂间距减小。粉末粒度越小,细胞颗粒所占比例越大,粉末粒度越细。
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来源期刊
稀有金属材料与工程
稀有金属材料与工程 工程技术-材料科学:综合
CiteScore
1.30
自引率
57.10%
发文量
17973
审稿时长
4.2 months
期刊介绍:
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