Transactions of Materials and Heat Treatment

Title：Numerical and experimental investigation of deep hole cylindrical component of AZ80 magnesium alloy

Authors： Li Jianping Che Luchang

Unit： Chongqing College of Electronic Engineering No.59 Institute of China Ordnance Industry

KeyWords： AZ80 magnesium alloy deep hole cylindrical component numerical simulation microstructure mechanical property

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2014,39(5):66-72

Abstract：

The flow stress-strain curves of AZ80 magnesium alloy were obtained on the Gleeble-1500 thermo-mechanical simulator, and the backward extrusion of AZ80 magnesium alloy was simulated numerically based on material constants obtained from flow stress-strain curves and rigid-plastic finite element method. The load-stroke curves during backward extrusion and distribution of effective stress and effective strain of billet interior were analyzed, and the effects of extrusion temperature and velocity on backward extrusion process were also discussed. The backward extrusion tests were carried out based on the simulation results, and the microstructure and mechanical property of formed parts were also discussed. The results show that the optimum backward extrusion temperature and velocity for deep hole cylindrical component of magnesium alloy is 360 ℃ and 5 mm·s-1, respectively. The components prepared by the above process are of very good surface finish and obviously refining microstructure, and the tensile strength, yield strength and elongation of components are 324 MPa, 216 MPa and 11%, respectively.

Funds：

国防基础科研项目（A1020110013）

李建平（1964-），男，硕士，副教授

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