Cellular automata simulation of grain growth of powder metallurgy Ni-based superalloy
作者机构：School of Materials Science and EngineeringBeihang UniversityBeijing 100191China National Engineering Laboratory of Additive Manufacturing for Large Metallic ComponentsBeijing 100191China Beijing Institute of Aeronautical MaterialsBeijing 100095China
出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)
年 卷 期：2023年第30卷第4期
页 面：838-848页
核心收录：
学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）]
基 金：National Major Science and Technology Project(2017-VI-0009-0079) Basic and Applied Basic Research Foundation of Guangdong Province(2020B0301030001)
主 题：Grain growth Cellular automata Ni-based FGH98 superalloy Primary γ'phase Microstructure
摘 要：Primary γ phase instead of carbides and borides plays an important role in suppressing grain growth during solution at 1433 K of Ni-based FGH98 *** illustrate that as-fabricated FGH98 superalloy has equiaxed grain structure,and after heat treatment,grains remain equiaxed but grow *** order to clarify the effects of the size and volume fraction of the primaryγ phase on the grain growth during heat treatment,a 2D cellular automata(CA)model was established based on the thermal activation and the lowest energy *** CA results are compared with the experimental results and show a good fit with an error less than 10%.Grain growth kinetics are depicted,and simulations in real time for various sizes and volume fractions of primaryγ particles work out well with the Zener *** coefficient n value which reflects the pinning ability in Zener relation is theoretically calculated,and its minimum value is 0.23 when the radius of primaryγ phase is 2.8μm.
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