In-situ Fe2P reinforced bulk Cu–Fe immiscible alloy with nanotwinned Cu produced by selective laser melting

• Published in: Journal of alloys and compounds Vol. 838; p. 155592
• Main Authors: Xie, Min, Zhou, Shengfeng, Zhao, Shuzhen, Jin, Jianbo, Chen, Dongchu, Zhang, Lai-Chang
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.10.2020; Elsevier BV
• Subjects: Amorphous alloys; Compressive properties; Compressive strength; Copper base alloys; Immiscible alloy; Laser beam melting; Miscibility; Nanotwins; Rapid prototyping; Selective laser melting; Strength and plasticity; Twin boundaries; Nanotwins; Strength and plasticity; Selective laser melting; Immiscible alloy
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.155592

In-situ Fe2P reinforced Cu–Fe bulk immiscible alloy with nanotwinned Cu (nt-Cu) was produced by selective laser melting. The immiscible alloy is characterized by ε-Cu, micrometer fibrous Fe2P and nanoscale Fe2P particles. Moreover, many α-Fe particles (∼30 μm) are distributed inside the fibrous Fe2P. Interestingly, large amounts of nt-Cu particles (∼15 nm) are dispersed inside the fibrous Fe2P and nanoscale Fe2P particles (∼200 nm). The combination of in-situ Fe2P and twin boundaries in the Cu–Fe immiscible alloy results in enhanced strength and plasticity with ultimate compressive stress of 896 ± 20 MPa and strain to failure of 19 ± 2%.