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"ColdArc" WAAM 模式和弧形火编织对 As-Built 和 Subtransus 灭 Ti-6Al-4V 的微观结构和属性的影响
Anna Zykova1, Nikolai Savchenko1, Aleksandra Nikolaeva1
1Institute of Strength Physics and Materials Science of the Siberian Branch of the RAS, pr. Academicheskiy, 2/4, Tomsk 634055, Russia.
Materials (Basel, Switzerland)
|May 25, 2024
概括
使用火编织的线弧增材制造 (WAAM) 提炼了合金微结构,提高了统一性. 这种技术可以改善谷物结构,而不会对火后的性能产生负面影响.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 金工业是金工业的一个方面.
背景情况:
- 电弧增材制造 (WAAM) 是制造大型金属元件的一个有前途的技术.
- 合金,如Ti-6Al-4V,由于其高强度与重量比,在航空航天和生物医学应用中广泛使用.
- 在WAAM过程中控制微结构对于实现所需的机械性能至关重要.
研究的目的:
- 研究接火编织对WAAM制造的Ti-6Al-4V元件的微观结构和机械性能的影响.
- 为了比较微观结构的演变和由此产生的样品的特性,生产和没有火编织.
- 评估加工后火对微观结构和性能的影响.
主要方法:
- 无缺陷的薄壁Ti-6Al-4V样本使用WAAM与"coldArc"技术进行制造.
- 采用了两种沉积策略:带有和没有接火,以1赫兹编织.
- 进行了微结构分析 (例如,粒度结构,相分布) 和机械测试.
- 样品经过在水中进行亚流体火.
主要成果:
- 在1Hz的接火编织中破坏了柱状β-Ti粒的表轴生长,导致更低的面积比.
- 在 $\beta$-Ti 颗粒中的 $\alpha$/$\alpha e'+ \beta$ 阶段结构在编织生产的样本中更为均.
- 亚体火并没有改变织物制成的样品的微观结构或特性.
- 火导致在没有编织的样品中产生更均的粒度结构,但在两种情况下相对延长率降低了30%.
结论:
- 接火编织是一种有效的策略,可以控制谷物形态,并改善WAAM生产的Ti-6Al-4V的微观结构统一性.
- 通过编织实现的精细微观结构提供了增强的性能,特别是与加工后处理相结合.
- 包括火编织在内的WAAM参数显著影响合金零件的最终微观结构和机械性能.
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