Browse > Article
http://dx.doi.org/10.7777/jkfs.2016.36.6.202

Effects of Iron and Silicon Additions on the Microstructures and Mechanical Properties of Aluminium Bronze  

Kim, Jee-Hwan (Department of Materials System Engineering, Pukyong National University)
Kim, Ji-Tae (Samyoung M-Tek Co., Ltd)
Kim, Jin-Han (Gyeongnam Regional Office of SMBA)
Park, Heung-Il (Department of Materials System Engineering, Pukyong National University)
Kim, Sung-Gyoo (Department of Materials System Engineering, Pukyong National University)
Publication Information
Journal of Korea Foundry Society / v.36, no.6, 2016 , pp. 202-207 More about this Journal
Abstract
The effects of Fe and Si additions on the microstructures and mechanical properties of aluminum bronze have been investigated. In a bar-type specimen cast in a die mold, the addition of Fe promoted the dendritic solidification of the ${\alpha}$ phase. The hardness values increased slightly in the Fe-added specimen with heat treatment, while these values was increased significantly in the specimens with Si or with combined additions of Fe and Si. When a centrifugal casting bush with combined addition of Fe and Si was heat treated, the FeSi compound within the matrix was finely dispersed, and was observed to be the origin of cup-cone type conical dimple failure in the tensile fracture surface. The mechanical properties of the heat treated centrifugal casting bushes, whose nominal alloy compositions were (Cu-7.0Al-0.8Fe-3.0Si)wt%, exhibited tensile strength of $703-781N/mm^2$, elongation of 6.6-11.7% and hardness of Hv 222.6-249.2. These high values of strength and elongation were attributed to the strengthening of the matrix due to the combined addition of Fe and Si, and to precipitation of fine the FeSi compound.
Keywords
Aluminium bronze; Iron and silicon additions; Microstructures; Mechanical properties;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. R. Dawis, ASM Speciality Handbook: Copper and copper alloys, ASM International, OH (2001) 85-104.
2 Copper Development Association, Aluminium Bronze Alloys Corrosion Resistance Guide: Publication No 80, Copper Development Association, UK (1981).
3 American Society for Metals, ASM Metals Handbook, 8th edition: Metallography, Structures and Phase Diagrams, American Society for Metals, OH (1973) 259.
4 Charlie R. Brooks, Heat Treatment, Structure and Properties of Nonferrous Alloys, American Society for Metals, OH (1982) 312-321.
5 The Materials Process Technology Center, "Technical Report on the Development of Aluminum Bronze Castings (Japanese)", 12 (2008) 24-28.
6 M. Yasar and Y. Altunpak, Materials and Design, "The effect of aging heat treatment on the sliding wear behaviour of Cu-Al-Fe alloys", 30 (2009) 878-884.   DOI
7 F. Hasan, J. Iqbal and N. Didly, Materials Science and Technology, "Microstructure of as-cast aluminium bronze containing iron", 4 (1985) 312-315.
8 Kwen OY and Kang CS, J. of Korean Institute of Metals and Materials, "Effect of Si on Microstructures and Mechanical Properties of Cu-Al Alloys", 3 (1978) 179-189.
9 J. R. Dawis, ASM Speciality Handbook: Copper and Copper Alloys, ASM Internation, OH (2001) 51-52.
10 American Society for Metals, ASM Metals Handbook, volume 12, 9th edition: Fractography, ASM Internation, OH (1987) 12-71.