Accessible Requires Authentication Published by De Gruyter May 4, 2017

Investigation of the influence of Fe on the microstructure and properties of Ti5553 near-β titanium alloy with combinatorial approach

Di Wu, Ligang Zhang, Libin Liu, Xi Shi, Shuaixiong Huang and Yun Jiang

Abstract

A combinatorial approach has been applied to build the database of composition dependent microstructure and hardness of the Ti5553–Fe system. The relationship between the composition and microstructure as well as the hardness was obtained. (Ti5553)96-Fe4 was found to have almost the same hardness as that of Ti5553, but a relatively coarser intragranular α phase. High-angle annular dark field imaging revealed that Fe mainly concentrated in the β phase, which strengthened the β phase through solution strengthening. This means that (Ti5553)96-Fe4 may have the same strength as that of Ti5553 but higher fracture toughness. The formation of FeCr compound consumed the β stabilizer elements Fe and Cr, which led to unusual increasing of the nucleation rate and the volume fraction of α phase in (Ti5553)88-Fe12.


*Correspondence address, Libin Liu, Ligang Zhang, School of Material Science and Engineering, Central South University, Lushan Road 932, Changsha, Hunan, 410083, P. R. China, Tel.: +86073188877732, Fax: +86073188876692, E-mail: (Libin Liu, Professor) (Ligang Zhang, Dr.)

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Received: 2016-09-01
Accepted: 2017-01-17
Published Online: 2017-05-04
Published in Print: 2017-05-15

© 2017, Carl Hanser Verlag, München