Transactions of Materials and Heat Treatment

Title：Processing drawing and flow instability analysis of TC4-DT titanium

Authors： Liu Cheng Dong Hongbo Zhang Guihua Zhu Shenliang Yu Xinping

Unit： Nanchang Hangkong University

KeyWords： TC4-DT titanium alloy processing map Murty criterion microstructure

ClassificationCode：

year,vol(issue):pagenumber：2015,40(1):113-118

Abstract：

Isothermal constant strain rate compression tests of TC4-DT titanium alloy on Gleeble-3500 were carried out. Processing map based on Murty criterion were researched within the temperature range 920-1040 ℃ and strain rate range 0.001-10 s-1,and the plastic flow instability behavior of alloy was analyzed. The results show that a large region of flow instability exists when titanium alloy deforms within the experimental parameters range, and the instability regions appear at high strain rate. Two appropriate deformation parameters are 920-940 ℃, 0.001-0.01 s-1 and 980-1040 ℃, 0.001-0.09 s-1. The microstructure evolution was analyzed that flow instabilities mainly include flow localization and non-uniform deformation of β grains in the instability region, otherwise the softening mechanism is mainly dynamic recrystallization in the stability region.

Funds：

国家自然科学基金资助项目(51164029)

刘诚（1988-），男，硕士研究生

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