Transactions of Materials and Heat Treatment

Title：Constitutive model of cold compaction forming for aluminum alloy 6061 powder

Authors： Wang Bin Huang Shangyu Zhou Mengcheng Lei Yu Sun Shimin

Unit：（School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China）

KeyWords： aluminum alloy 6061 powder compaction forming constitutive model numerical simulation secondary development

ClassificationCode：TF121

year,vol(issue):pagenumber：2018,43(5):0-0

Abstract：

In the process of powder compacting, the constitutive equation of material characterizing the deformation mechanism of powder is the basis of researching and analyzing on powder compaction process by numerical simulation method, so the established powder compaction constitutive equation is of great significance to research the rules of powder compaction forming for aluminum alloy and optimize the mold design and process parameters. Through uniaxial compression, radial compression (Brazilian disc experiment) and die compaction experiment for aluminum alloy 6061 powder, the rules of relevant material parameters changing with relative density were obtained and the Drucker-Prager Cap constitutive model was successfully established. By adding model parameters of aluminum alloy 6061 powder in density field of powder material，the simulation analysis of compaction process for aluminum alloy 6061 powder was carried out by secondary development user subroutine USDFLD of Abaqus simulation software, and the correctness of cold compaction DPC constitutive model for aluminum alloy 6061 powder was verified by the results of pressing force, displacement curve and relative density distribution. When the density is in the range of ρ=0.75-0.84, the simulation precision is high, that is, the modified DPC model can more accurately describe the late suppression behavior of aluminum alloy 6061 powder.

Funds：

国家自然科学基金资助项目(51475345)

作者简介：王斌（1993-），男，硕士研究生 Email：15527455137@163.com 通讯作者：黄尚宇（1963-），男，硕士，教授 Email：huangshy@whut.edu.cn

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