Transactions of Materials and Heat Treatment

Title：Influence of friction on heterogeneous plastic deformation for high

Authors： Zhang Zihan Song Yuepeng Gao Dongsheng Li Fade1 Kim Hyoungseop

Unit： Shandong Agricultural University Pohang University of Science and Technology

KeyWords： friction high pressure torsion heterogeneous plastic deformation numerical simulation interstitial-free steel

ClassificationCode：TG302

year,vol(issue):pagenumber：2018,43(11):127-131

Abstract：

The high-pressure torsion (HPT) process of interstitial-free steel specimen was simulated by finite analysis software DEFORM-3D, and the influences of friction on heterogeneous plastic deformation of HPT specimen were investigated. The results indicated that the friction factor between specimen and mould plays an important role on the heterogeneous plastic deformation and influences the degree of plastic deformation directly. However, the fin length of HPT specimen decreases with the increase of fiction. In addition, the friction impedes the plastic deformation in the compression stage resulting in significant heterogeneous plastic deformation characteristics, the friction remarkably promotes plastic deformation in the torsion stage, and the larger the fiction factor is, the greater the uneven plastic deformation of specimen is. At the same time, severe plastic deformation and fin occur at the edge of specimen in the HPT process. With the increase of fiction factor, the area of severe plastic deformation gradually approaches the core of specimen, and the fin length of specimen becomes shorter gradually. At last, the test results of the hardness distribution of the HPT specimen are consistent with the simulation results.

Funds：

国家十三五智能农机装备重点研发计划资助项目(2016YFD0701701，2018YFD0700604)；山东省现代农业产业技术体系果品产业创新团队资金资助项目(SDAIT-06-12，SDAIT-06-1)；山东农业大学“双一流”科技创新团队专项资助项目(SYL2017XTTD07)；山东省重大科技创新工程项目（2018CXGC0209）

张紫涵（1994-），女，硕士研究生,E-mail：zpurpleh@163.com;通讯作者：宋月鹏（1971-），男，博士，教授,E-mail：uptonsong@163.com

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