AI 中文总结
本研究建立将打印参数与铁磁体畴壁钉扎矫顽力关联的解析理论，引入约束因子，模型预测多类合金实验数据误差在1.9倍内，可用于制造前筛选合金成分。
AI 中文摘要
成型态打印铁磁体通常比优化后的锻造材料具有更高的矫顽力，但现有解释依赖经验拟合或昂贵的模拟。本文提供了一种缺失的解析理论，将打印参数直接与冷却速率、胞间距、位错密度及畴壁钉扎矫顽力关联。基于金相晶粒数据并使用单个拟合常数，该模型对纯铁、Fe-6.9Si及多组分合金的6组实验数据集的预测误差在1.9倍以内。研究表明，组态晶格畸变可忽略，意味着单相打印合金遵循稀释钉扎定律。关键地，本文引入约束因子$E=\sqrt{\lambda_{c}/2\delta_{w}}$，证明凝固诱导的位错堆积使胞状微结构比传统冷加工金属更硬。该框架可生成合金敏感性图谱，用于制造前筛选和排序成分。
英文摘要
As-built printed ferromagnets typically exhibit higher coercivity than optimized wrought materials, yet existing explanations rely on empirical fits or costly simulations. Herein, we provide a missing analytical theory that links print parameters directly to cooling rates, cellular spacing, dislocation density, and domain-wall pinning coercivity. Informed by metallographic grain data and using a single fitted constant, our model predicts six experimental datasets for pure Fe, Fe-6.9Si, and a multicomponent alloy within a factor of 1.9. We demonstrate that configurational lattice distortion is negligible, implying that single-phase printed alloys follow dilute-pinning laws. Critically, we introduce a confinement factor, $E=\sqrt{λ_{c}/2δ_{w}}$, proving that solidification-induced dislocation packing makes cellular microstructures harder than conventionally cold-worked metals. The framework enables an alloy-sensitivity map to screen and rank compositions before manufacturing.
