材料科学
层状结构
复合材料
复合数
因科镍合金
高温合金
扭转(腹足类)
合金
粉末冶金
结构材料
延展性(地球科学)
冶金
微观结构
蠕动
医学
外科
作者
G.M. Karthik,Peyman Asghari‐Rad,Praveen Sathiyamoorthi,Alireza Zargaran,Eun Seong Kim,Taek Soo Kim,Hyoung Seop Kim
标识
DOI:10.1016/j.scriptamat.2021.113722
摘要
Multi-metal composites have gained much interest in recent years to explore the unfilled space of the strength-elongation window. However, producing these composites is challenging and is limited to a few material combinations because most processing techniques involve melting/solidification and high-temperatures. This work demonstrates a new powder metallurgy-based approach to produce these composites using high-pressure torsion. Lamellar nano-crystalline composite with high entropy alloy (CoCrFeMnFe) matrix and uniformly distributed nickel-base superalloy (Inconel 718) reinforcement are realized after high-pressure torsion. The current approach has resulted in an excellent metallurgical bonded interface with an ultra-fine grain size in both the matrix and reinforcement. The samples showed an exceptional synergy of high yield strength ~900 MPa and elongation ~40%, overcoming the perennial challenge in multi-metal composites. The current approach is versatile and can open up a horizon of multi-material combinations with a synergy of strength and ductility.
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