Transactions of Materials and Heat Treatment

Title：Study on forming limit diagram of thermal drawing for hard aluminum alloy 2A12 sheet

Authors： Liu Jian Shen Rulin Zhan Lihua Yang Youliang Hu Libin Li Xianmeng

Unit： Central South University

KeyWords： hard aluminum alloy 2A12 thermal drawing forming limit diagram the maximum load judgment method strain path method MSC.MARC

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2018,43(1):170-176

Abstract：

The ultimate strain experiment of hard aluminum alloy 2A12 at 350-450 ℃ was carried out by special thermal drawing die of independent design, and its forming limit diagram of strain at this temperature ranges was obtained. Then, the influences of temperature on the forming limit diagrams of hard aluminum alloy 2A12 in the thermal drawing process were analyzed, and the thermal drawing forming limit of sheet metal was numerically simulated by three wrinkle criterions such as the maximum load judgement method, strain path method and combination of the above two methods based on MSC.MARC software. Comparing the numerical simulation results with the experimental results, it is found that the combination of two methods are in good agreement with the experimental results. Based on different temperatures, a prediction model of thermal drawing limit of hard aluminum alloy 2A12 was established, which provides a theoretical basis for the forming experiment of hard aluminum alloy 2A12 at different temperatures.

Funds：

国家重点研发计划(2017YFB0306300)；国家自然科学基金重点项目(51235010)；中南大学研究生自主探索创新项目（1053320170677）

作者简介：刘健（1991-），男，硕士研究生，E-mail：1161367682@qq.com；通讯作者：湛利华(1976-)，女，教授，博士，E-mail：yjs-cast@csu.edu.cn

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