Hybrid manufacturing (HM) Ti-6Al-4V components combining the advantages of forging and additive manufacturing were achieved. The bonding zone of the HMed component joins the substrate and the additive manufactured zone and its α′-α/α′/α_m-α/β heterogeneous microstructure was attributed to the distinguishing cooling rate and pseudo-isothermal annealing temperature. The phase transformation mechanisms were clarified with a numerical simulation model for thermal analysis. Moreover, preheating manipulate the size, volume fraction and distribution of α′/α_m/α phases to tailor the heterogeneous microstructure.

中文翻译：

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混合制造的 Ti-6Al-4V 中结合区的异质组织及其对预热的依赖性

混合制造 (HM) Ti-6Al-4V 组件结合了锻造和增材制造的优势。HMed 部件的结合区连接基体和增材制造区，其 α'-α/α'/α _m -α/β 异质微观结构归因于不同的冷却速度和伪等温退火温度。通过用于热分析的数值模拟模型阐明了相变机制。此外，预热可控制 α'/α _m /α 相的尺寸、体积分数和分布，以定制异质微观结构。