A forming load prediction model in BMG micro-back extrusion process considering size effect

摘要：

　　The size effect was considered to improve the prediction accuracy of forming load in the micro-backward extrusion process of a Zr55Cu30Al10Ni5 BMG cup-shaped specimen.The ratio of the billet surface to volume near the working land of back-extrusion punch was proposed as size effect factor.Then the size effect factor was coupled into a backward extrusion load prediction formula of conventional macroscopic parts.The micro-sized BMG cups with different size-wall thickness varying from 20μm to 125μm were deformed in super-cooled liquid state.The initial diameter of the billets is 600μm and the experiments were conducted at Zwick/Roell Z200 Press.The forming loads were recorded and compared with the calculated values from the proposed prediction model.The results showed that the proposed model can predict the forming load with very small deviation.

关键词： size effect BMG micro-backward extrusion forming load prediction

作者: Wang Xinyun Zhang Mao Tang Na Li Ning Liu Lin Li Jianjun

作者单位: State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, P.R. China

会议类型: 国际会议

会议名称: 第五届亚洲微纳成形技术研讨会(AMMFT2012)暨第三届微纳成形学术委员会会议

会议地点: 哈尔滨

会议语种:英文

页码: 33-35

在线出版日期: 2012-08-01（万方平台首次上网日期，不代表论文的发表时间）