高温合金
材料科学
热等静压
蠕动
有限元法
变形(气象学)
冶金
近净形状
镍
紧迫的
粉末冶金
涡轮叶片
相对密度
复合材料
涡轮机
微观结构
机械工程
结构工程
工程类
作者
Hosam ElRakayby,Ki Tae Kim
标识
DOI:10.1080/00325899.2017.1298875
摘要
Hot isostatic pressing of nickel-based superalloys has important applications for manufacturing near-net shape parts such as turbine disks and jet engine parts, which have to operate at high temperatures. Finite element modelling can be used to predict deformation and densification behaviour of such superalloys. Thus, the cost and time of trial and error to obtain the required geometry of the part can be reduced, such that near-net shape parts can be manufactured more economically. Numerical simulations were carried out by implementing the model of ElRakayby and Kim into Abaqus-FEA. The model parameters (relative density functions f and c) for the nickel-based superalloy were obtained from the creep response and compressive strength of porous and solid powder compacts at high a temperature. The agreement between finite element calculations and the experimental data was good for densification, shape change and density distribution of nickel-based superalloy during hot isostatic pressing.
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