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Mechanical Properties and Deformation Mechanism of Tungsten/titanium Hybrid Foam by Shuai Ge; Jian Zhang; Qinqin Wei; Shiquan Zhang; Guoqiang Luo; Qiang Shen is a Engineering article available to read on EtoBox.

What is Mechanical Properties and Deformation Mechanism of Tungsten/titanium Hybrid Foam about?

Tungsten foams with low relative densities are often generate inhomogeneous distributions of stress around ligament defects, which induce strain localization and lead to serious degradation of the mechanical properties. To optimize the mechanical responses of the tungsten foams, we developed a novel hybrid ligament designed to strengthen the tungsten with soft titanium and reduce the effects of strain localization. Titanium was first introduced into the tungsten ligament via a W-Fe6W6C-Ti connection structure and then transported to the defect area via heat treatment. The tungsten/titanium hybrid foams showed higher ultimate strengths than the tungsten foams. Based on loading–unloading compression tests, the impact of the relative density on the failure mode was determined, and the strain localization was quantitively measured based on the residual strain in the early fracture region. Hybrid foams with relative densities of 0.276–0.53 showed maximum fracture strengths of 91.3–498.8 MPa. Compared with the tungsten foams, the titanium phases accommodated the strain, reduced the impact of strain localization and decreased local crack accumulation by 47.0%, indicating high efficiency i

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Author

Shuai Ge; Jian Zhang; Qinqin Wei; Shiquan Zhang; Guoqiang Luo; Qiang Shen

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)