畴壁能决定有序和无序增材制造Fe--49Co--2V的矫顽力
Domain-wall energy governs coercivity in ordered and disordered additively manufactured Fe--49Co--2V
- University of Manitoba（曼尼托巴大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本研究通过校准锻造Fe--49Co--2V的有序参数，证明增材制造合金的额外矫顽力源于保留缺陷而非B2有序化，从而将工艺优化转向构建中的缺陷控制。
AI中文摘要：
增材制造的软磁Fe--Co合金始终比相同成分的锻造材料更难磁化，控制这种额外硬度是从这些合金打印电机的主要障碍。文献将其归因于B2化学有序化，但这一假设未经检验，因为该合金的有序态各向异性尚未被测量，且打印材料从未与晶粒尺寸匹配的锻造材料进行过比较。在本研究中，我们提供了这两方面的数据。通过在已知有序参数的锻造Fe--49Co--2V上进行校准，确定了有序态畴壁能，并限制了所有与晶粒尺寸无关的钉扎通道。然后，有序化效应比实测的额外硬度低数个数量级，而反相畴尺寸变化十倍时矫顽力保持不变。有序化控制的是壁能，且该效应较小且有界。额外硬度源于保留的缺陷含量，这使工艺优化从构建后退火转向构建中的缺陷控制。
英文摘要：
Additively manufactured soft-magnetic Fe--Co is consistently harder than wrought material of the same composition, and controlling that excess is the central obstacle to printing electrical machines from these alloys. The literature attributes it to B2 chemical ordering, untested because the anisotropy of the ordered state had not been measured for this alloy and because printed material had never been compared with wrought material at matched grain size. In this study we supply both. Calibrating on wrought Fe--49Co--2V at a known order parameter fixes the ordered-state domain-wall energy and caps every pinning channel independent of grain size. Ordering then falls orders of magnitude short of the measured excess, and a tenfold change in antiphase-domain size leaves coercivity unchanged. What ordering controls is the wall energy, and that effect is small and bounded. The excess is retained defect content, which moves process optimization from post-build annealing to in-build defect control.
