Density determination and simulation of Inconel 718 alloy at normal and metastable liquid states

HP Wang and CH Zheng and PF Zou and SJ Yang and L Hu and B Wei, JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 34, 436-439 (2018).

DOI: 10.1016/j.jmst.2017.10.014

The density of liquid Inconel 718 alloy was experimentally measured by electrostatic levitation technique, where the maximum undercooling of 100 K was realized for the commercial sample. The measured density of liquid Inconel 718 alloy is 7.39 g cm(-3) at the liquidus temperature of 1663 K which was confirmed by DSC experiment, with the linear temperature coefficient of -6.89 x 10(-4) g cm(-3) K-1. Correspondingly, four ternary Ni-Cr-Fe compositions were designed to simulate the density of liquid Inconel 718 alloy with 16000 atoms, from which the liquid structure is revealed by pair distribution function. The predicted result shows a remarkable enhancement with the decrease of temperature at the first neighbor distance. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

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