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Effect of Primary α Grain on Variant Selection of Secondary α Phase in a Near-α Titanium Alloy

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Document pages: 16 pages

Abstract: Based on the statistical analysis on the orientation relationships (ORs) among adjacent primary α (αp) grain, β phase and secondary α (αs) colony in a bimodal-structure near-α titanium alloy, the effect of αp grain on the variant selection of αs was investigated. Four special ORs were determined between αp grain and β phase. Correspondingly, the αs colony tends to preferentially nucleate on the special OR-αp grain and keep a corresponding OR with the OR-αp grain, which could be attributed to the minimized interfacial energy of αs-αp interface.

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