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Journal of Materials Engineering and Performance

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22-01-2019

Microstructure and Mechanical Behavior of Heat-Treated and Thermomechanically Processed TA15 Ti Alloy Composites

Authors: Huili Wu, Zhichao Sun, Jing Cao, Zhikun Yin

Published in: Journal of Materials Engineering and Performance | Issue 2/2019

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Abstract

For TA15 Ti alloy, which has been widely used to form key load-bearing components in aeronautic and space fields, particular performances and corresponding microstructures are demanded due to various service environments. By applying single-phase field heat treatment, single-phase + two-phase field heat treatments, forging (α + β phase zone) combined with high-temperature aging and dual heat treatment, four types of microstructures, namely the fully lamellar microstructure, basket weave microstructure, two-phase composite microstructure and tri-modal microstructure, were obtained, respectively. And after conducting mechanical property tests for these microstructures, it was found that enhancing the lamellar thickness in the fully lamellar microstructures, reducing the content of equiaxed α phase to about 20% or increasing the content of lamellar phase in the two-phase composite microstructures and controlling the content of equiaxed α phase within 20% in the tri-modal microstructure were beneficial for performance improving. In addition, two-phase and three-phase composite microstructures possessed excellent comprehensive mechanical properties, and fully lamellar microstructures had the highest fracture toughness.

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Title: Microstructure and Mechanical Behavior of Heat-Treated and Thermomechanically Processed TA15 Ti Alloy Composites
Authors: Huili Wu
Zhichao Sun
Jing Cao
Zhikun Yin
Publication date: 22-01-2019
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 2/2019
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-3881-5

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