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Effect of Texture on the Impact Toughness of Ti-6Al-3Nb-2Zr-1Mo alloy
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DOI：10.1016/j.msea.2026.150302.png)
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Abstract
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Due to high specific stiffness and strength, excellent impact toughness and corrosion resistance, Ti-6Al-3Nb-2Zr-1Mo alloy is a promising candidate for next-generation marine applications to replace steels for the sake of weight and energy saving. However, the effect of microstructure and texture on the impact toughness has not yet been systematically investigated. In this regard, samples with different volume fractions of primary α and notch directions are tested by a drop weight impact toughness machine. The in-depth relationship among microstructure, texture, crack initiation and propagation is revealed by interrupted impact experiments. Results show that the impact toughness is dependent upon the crack propagation energy, while the crack initiation energy is nearly identical among samples. The anisotropic impact toughness of TD-ND and TD-RD samples (TD-ND>TD-RD), especially in samples with a high volume fraction of primary α phase, can be attributed to the different activities of prismatic slip and tension twins. The fundamental understanding of this topic could shed light on the design of thick titanium plates by considering not only the microstructure but also the texture for marine applications.
Keywords:
Impact toughness
Texture
Microstructure
Crack propagation
Titanium alloy
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