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Characteristic of Deformation of Ti-6Al-4V Alloy with Hydrogen at High Temperature

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Abstract:

The effects of hydrogen on the microstructure and hot deformation behavior of Ti-6Al-4V alloy were studied, and the differences of microstructure and high temperature compressive behavior between the specimens hydrogenised various time at 700 oC and with the same hydrogen contents were analyzed. The results showed that the addition of hydrogen decreases the deformation resistance of Ti-6Al-4V alloy at high temperature. The flow stresses of specimens with the same hydrogen content declined as the prolongation of hydrogenating time. The microstructure observation indicated that stick-type microstructure was obtained in Ti-6Al-4V alloy annealed at 700 oC for 2 hours. Hydrogenation at 700 oC for 2 hours resulted in fine α plate in β transformed microstructure. When the hydrogenation time was prolonged to 6 hours, the volume fraction of newly-formed α plates increased and the prior α plates became coarser.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

683-686

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.683

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Online since:

September 2007

Authors:

Zhong Hua Li, Qing Wang, Dong Li Sun, Li Ping Zhang

Keywords:

Flow Stress, Hot Deformation, Hydrogen Treatment, Ti6Al4V Alloy

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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