High strength ultrafine eutectic Fe-Nb-Al composites with enhanced plasticity

作者：Park J M; Kim K B; Kim W T; Lee M H; Eckert J; Kim D H^*

来源：Intermetallics, 2008, 16(5): 642-650.

DOI：10.1016/j.intermet.2008.01.005

• composites
• alloy design
• work-hardening
• casting
• microstructure

An enhancement of plasticity in high strength ultrafine eutectic Fe-Nb composites has been accomplished by introducing heterogeneities in length-scale of the microstructure. Addition of Al acting as a stabilizer for the alpha-Fe phase in the Fe-Nb composites results in the formation of a larger volume fraction of primary alpha-Fe phase and an ultrafine eutectic structure with reduced lamellar spacing. As a result, Fe-Nb-Al composites exhibit a good combination of fracture strength and plasticity. Due to the presence of the solution hardened alpha-Fe phase, the Fe-Nb-Al composites exhibit significantly enhanced work hardening behavior at room temperature.

• 出版日期2008-5