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首页> 外文期刊>Journal of Materials Science >Effect of process parameters on grain structure formation during VAR of INCONEL alloy 718
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Effect of process parameters on grain structure formation during VAR of INCONEL alloy 718

机译：工艺参数对INCONEL 718合金VAR期间晶粒结构形成的影响

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摘要

The development of grain structure during Vacuum Arc Remelting (VAR) of INCONEL1 alloy 718, a nickel-based superalloy, is complex depending both on compositional variations and a range of process parameters. A multiscale model is presented which combines a macroscopic solution of the heat transfer, fluid flow and electromagnetism with a mesoscopic model of grain nucleation and growth. The model was used to investigate the influence of variations in process control parameters upon the macroscopic molten pool size and shape, together with the predicted grain structure. Simulations of structures produced for variations in melt rate, arc power and arc focus (both thermal and electrical) were compared with observations from instrumented and characterized plant-trials for steady state melting conditions; good agreement was achieved. (C) 2004 Kluwer Academic Publishers.
机译：INCONEL1合金718（一种镍基高温合金）在真空电弧重熔（VAR）期间的晶粒结构发展非常复杂，这取决于成分变化和工艺参数范围。提出了一个多尺度模型，该模型将传热，流体流动和电磁的宏观解决方案与晶粒成核和生长的介观模型相结合。该模型用于研究过程控制参数变化对宏观熔池尺寸和形状以及预测晶粒结构的影响。将熔化速率，电弧功率和电弧聚焦（热和电）变化产生的结构模拟与通过仪器化和表征的植物试验在稳态熔化条件下的观察结果进行了比较;达成了良好的协议。 （C）2004 Kluwer学术出版社。

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