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Achieving Strength-Ductility Synergy in Medium-Entropy Alloys via Trace Air in Additive Manufacturing
2026-04-29
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Impact score: 35
A research team at Beijing University of Science and Technology has found that introducing trace amounts of air (oxygen and nitrogen) during additive manufacturing of Ti56Zr30Nb14 medium-entropy alloys can replace high-purity inert gases. After optimization, yield strength increased by 67% to approximately 1 GPa, and tensile ductility improved by 64% to about 18%, breaking the strength-ductility trade-off. This low-cost, scalable method offers a new path for fabricating strong and tough metallic materials.
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通过利用微量空气在增材制造中实现中等熵合金的强度-延展性协同
北京科技大学团队研究发现，在Ti56Zr30Nb14中熵合金的增材制造中，通过引入微量空气（氧和氮）可替代高纯惰性气体。优化后屈服强度提升67%至约1GPa，拉伸延展性提高64%至约18%，打破了强度-延展性权衡。该低成本、可规模化方法为制造强韧金属材料提供了新路径。