Influences of Heat Treatment on Microstructure and Creep Properties of Ti6Al4V Alloy

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By means of the measurement of creep curves and microstructure observation, the influence of T6 heat treatment on the microstructure and creep properties of the wrought Ti-6Al-4V the alloy has been investigated. The experimental results showed that the microstructure of the wrought alloy consists of the strip-like +  phases, which results in the alloy displaying a higher strain rate and shorter creep life under the test condition of 575 MPa and 400°C. After T6 treatment, the creep life of the alloy at same conditions enhanced to 548 h from 66 h. Microstructure of T6 treated alloy consisted of the primary  and /phases, and signification amount of the bundle-likephase precipitated along the different orientations in the grains, this is a main reason of enhancing creep life of the alloy. During forging, the denser dislocation rows were activated in the local region of the matrix in the alloy. During creep, the deformed mechanism of the alloy was the double orientations slip of and dislocations activated on the pyramidal planes in  phase.

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Main Theme:

Edited by:

Zhong Wei Gu, Yafang Han, Fu Sheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou

Pages:

658-662

DOI:

10.4028/www.scientific.net/MSF.610-613.658

Citation:

S. G. Tian et al., "Influences of Heat Treatment on Microstructure and Creep Properties of Ti6Al4V Alloy", Materials Science Forum, Vols. 610-613, pp. 658-662, 2009

Online since:

January 2009

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$35.00

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