Deformation and strength characteristics of Laves phases in titanium alloys

C.D. Rabadia; Y.J. Liu; L.Y. Chen; S.F. Jawed; L.Q. Wang; H. Sun; L.C. Zhang

Materials & Design (Oct 2019)

Deformation and strength characteristics of Laves phases in titanium alloys

C.D. Rabadia,
Y.J. Liu,
L.Y. Chen,
S.F. Jawed,
L.Q. Wang,
H. Sun,
L.C. Zhang

Affiliations

C.D. Rabadia: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
Y.J. Liu: School of Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
L.Y. Chen: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia; School of Science, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China
S.F. Jawed: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
L.Q. Wang: State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.
H. Sun: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia
L.C. Zhang: School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia; Corresponding authors.

Journal volume & issue: Vol. 179

Abstract

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The superior reinforcement nature of Laves phases make them suitable for high-strength applications. Therefore, investigations on the deformation and strength characteristics of Laves phases are useful in development of an improved Laves phase-reinforced alloy. In this work, the Vickers micro-indentation method is used to evaluate and compare the deformation and strength characteristics of a hexagonal close-packed Laves phase (C14-type) in Ti-35Zr-5Fe-6Mn (wt%) and a face-centered cubic Laves phase (C15-type) in Ti-33Zr-7Fe-4Cr (wt%), considering the same volume fraction of Laves phase (~7.0%) in these alloys. Moreover, the effects of higher volume fraction of Laves phase (19.4%) on indentation-based deformation features are evaluated in Ti-35Zr-5Fe-8Mn (wt%). Remarkably, dislocation activity and plastic deformation features are evident in the C15-type Laves phase, whereas the C14-type Laves phase strongly blocks dislocation motion. Therefore, the C15-type Laves phase improves plastic deformability, whereas the C14-type Laves phase improves strength characteristics of Laves phase-reinforced alloys. Keywords: Titanium alloy, Micro-indentation, Laves phase, Deformation, Slip, Dislocation

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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