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3. Anisotropy and residual stress in B4C-ZrB2 eutectic

Author

Atta U. Khan, Chawon Hwang, Richard A. Haber, Qirong Yang, Eric D. Gronske, and Vladislav Domnich

Subjects
010302 applied physics, Toughness, Materials science, Mechanical Engineering, Composite number, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, symbols.namesake, chemistry.chemical_compound, chemistry, Mechanics of Materials, Residual stress, Boride, 0103 physical sciences, symbols, General Materials Science, Composite material, 0210 nano-technology, Raman spectroscopy, Anisotropy, Eutectic system
Abstract

Microstructure texturing in eutectic composites is known for contributing to anisotropic materials properties. Although B4C-ZrB2 eutectic has long been discovered, very little is known about how the highly textured microstructure and the crystallographic orientation of the constituent phases affect the mechanical properties of the composite. In this study, B4C-ZrB2 eutectic is prepared via arc melting to investigate the hardness and toughness anisotropy due to microstructure texturing and crystallographic orientations. In addition, residual stresses responsible for the observed toughening mechanisms were elucidated using the theoretical model and Raman stress mapping.

Published
2019
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