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Single and multiple bead tests were conducted on two bulk titanium alloys, (α+β) Ti-6Al-4V (Ti64) and near-α Ti-6Al-2Sn-4Zr-6Mo (Ti6246), to assess the dependence of the melt pool shape and the heat-affected zone on the α'-martensite formation. Although the exact mechanism remains unclear, the results suggest that prolonged thermal exposure plays a critical role. Notably, one alloy showed an a typical α' formation behavior: α' structures became finer with increasing energy density, indicating a unique interplay between alloy composition and localized thermal conditions.

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キーワード: Additive Manufacturing, Powder Bed Fusion,, Ti-6Al-4V, Ti-6Al-2Sn-4Zr-6Mo, volumetric energy density, fast cooling rate, melt pool shape

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会議: 日本Additive Manufacturing学会 第1回年次講演大会 (2025-09-01 - 2025-09-03)

研究助成金:

• 日本学術振興会 21H05198 (超温度場スーパーチタン創成科学)
• 公益財団法人軽金属奨学会 (教育研究資金･研究補助金)

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.5818

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更新時刻: 2025-10-21 16:06:51 +0900

MDRでの公開時刻: 2025-10-21 15:43:43 +0900