图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Zhimin Liu,Shuming Xing ,Peiwei Bao,Nan Li,Shuqing Yao and Milan Zhang School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China
摘 要:To evaluate the flow stress of the twin-roll casting magnesium sheet in high temperature forming processes,a new analytical model was proposed by analyzing stress-strain curves measured under various temperatures and strain rates.The model can be parameterized to reflect the volume fraction of semi-sold grain and sold grains undergoing twinning.By applying the new model,the result showed that the simulated stress-strain curves fit the experiment data very well.Such curve fitting can be employed for any magnesium sheet when the deformation conditions are known.Microstructure evolution indicated that it affected the stress-strain curves directly.The mechanisms of dynamic recrystallization(DRX) depended on the operating deformation mechanisms,which changed with temperatures.And the volume fraction and grain size of DRX changed with the Zener-Hollomon parameter and temperatures.
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