Transactions of Materials and Heat Treatment

Title：Additive forming process experiment and interface healing law for 2219 aluminum alloy

Authors： Cheng Zhe Qian Dongsheng Deng Jiadong

Unit： Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Hubei Engineering Research Center for Green Precision Material Forming

KeyWords： 2219 aluminum alloy additive forming hot compression interface healing mechanical properties

ClassificationCode：TG319

year,vol(issue):pagenumber：2020,45(12):171-177

Abstract：

For the problem of regulating the microstructure and properties of large aluminum alloy forgings, an additive forming method was proposed to form large aluminum alloy forgings by thermal deformation and thermal preservation after vacuum diffusion pre-connection of small-size blank units, and the influences of different deformation amounts and holding times after pressing on the interface healing were studied by additive forming process experiments of 2219 aluminum alloy material with the deformation temperature of 460 ℃, the deformation amounts of 10%, 30% and 50%, and the holding time of 0-4 h. The results show that with the increasing of deformation amount from 10% to 50%, the interface changes from a narrow gap to a small hole and finally achieves healing completely, and the oxygen element at the interface diffuses from the interface to the base material in the process of heat holding after pressing. In addition, its mechanical properties also gradually increase with the increasing of deformation amount and holding time, and finally reach a level equivalent to the mechanical properties of base material.

Funds：

国家重点研发计划项目（2018YFA0702905）；国家自然科学基金资助项目（51805391）；教育部创新团队发展计划项目(IRT_17R83)；中央高校基本科研业务费专项资金资助（2019IVA027）

程喆（1992-），男，硕士研究生 E-mail：whutchengzhe@163com 通讯作者：邓加东（1988-），男，博士，讲师 E-mail：dengjd88@126com

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