Mechanical properties and microstructural change in (Cu–Fe) immiscible metal matrix composite: Effect of Mg on secondary phase separation

Journal of Materials Research and Technology

Hee Ra Jo¹  Hae Jin Park²  Yeon Beom Jeong²  Hidemi Kato²  Ki Buem Kim³ 

[1] Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan;Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 143-747, Republic of Korea;Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan;

关键词: Immiscible alloy system;    Metal matrix composite;    Cu alloy;    Mechanical property;   

DOI  :  

来源: DOAJ

【 摘 要 】

Phase morphology and the distribution of the strengthening phase generally have a strong influence on the movement of dislocations. The presence of minor alloying element Mg in Cu–30Fe alloy significantly affects both the morphology and distribution of the strengthening phase. Dendritic α-Fe is transformed into a spherical morphology because of changes in the chemical composition during the solidification process. The presence of Mg leads to the formation of secondary phase-separated Cu within the α-Fe phase and to increasing heterogeneity of the gradient size of the α-Fe phase. The increased volume fraction of α-Fe enhanced by secondary separated Cu, refinement of α-Fe, and the degree of distribution enhanced the yield strength of this alloy by 40% compared with that of Cu–30Fe. This result can be used as a guide to modifying the morphology of Cu–Fe alloys and improve understanding of strengthening mechanism of this system.

【 授权许可】

Unknown