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Hot Simulation Compression of In Situ TiBw/Ti6Al4V Composites with Novel Network Microstructure

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Abstract:

The hot compression behavior of in situ TiB whiskers reinforced Ti6Al4V (TiBw/Ti6Al4V) composites with a novel network microstructure is investigated in the temperature range of 900-1100°C and strain rate range of 0.001-10 s-1. The results show that all the stress-strain curves of the composites display peak flow, softening and steady-state. Moreover, the peak flow stress decreases with increasing temperatures and decreasing strain rates. Processing map of the composite is constructed using the dynamic material model (DMM). Dynamic recrystallization (DRX) of α phase is observed in the deformation region corresponding with peak efficiency of the processing map. However, the flow instability region ranged from 900 to 1100°C at strain rates higher than 1.0 s-1 should be avoided.

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Periodical:

Materials Science Forum (Volume 762)

Pages:

382-386

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.762.382

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Online since:

July 2013

Authors:

Lu Jun Huang, Yu Zi Zhang, Lin Geng

Keywords:

Flow Stress, Hot Compression, Network Microstructure, Processing Map, Titanium Matrix Composites (TMCs)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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