Transactions of Materials and Heat Treatment

Title：Numerical simulation of complex thin-walled aluminum alloy part manufactured by hot isostatic pressing

Authors： Xu Wencai Lang Lihui Huang Xina Li Fei

Unit： Beihang University Chengdu Aircraft Industry (Group) Co. Ltd.

KeyWords： 2A12 aluminum alloy hot isostatic pressing thin-walled part microstructures numerical simulation

ClassificationCode：TF124

year,vol(issue):pagenumber：2019,44(6):65-72

Abstract：

Based on the Shima model in MSC.Marc finite element analysis software, the hot isostatic pressing process of complex thin-walled part for 2A12 aluminum alloy was simulated, and the forming experiments were conducted and validated. The simulation results show that due to the mold constraint, the bottom position of the characteristic hollow column appears ‘horn mouth’, the relative density of the characteristic rib presents gradient distribution from top to bottom, the graphite mold has micro-deformation, and the top and bottom of the characteristic rib show the varying degrees of inward contraction. The experimental results show that there are errors between the formed characteristic rib, characteristic angles and the simulation results, but they are within the error tolerance. However, the tensile strength is 318.3 MPa, the specified non-proportional extension strength of material is 176.3 MPa, and the elongation after fracture is 6.8%. Furthermore, the main fracture modes are quasi-cleavage fracture and intergranular fracture, and the full densification between powder particles is observed by the metallographic micrographs.

Funds：

国家自然科学基金资助项目（51675029）

徐文才（1992－），男，硕士研究生 E-mail：xuwencai@buaa.edu.cn 通讯作者：郎利辉（1970-），男，博士，教授 E-mail：lang@buaa.edu.cn

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