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Vol.55, No.8, 537 ~ 544, 2017
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| Title |
| Effect of Al and Zr Contents on Mechanical Properties of Ni-Al-Bronze |
| 안지혁 Jee Hyuk Ahn , 김동욱 Dong Wook Kim , 김민수 Min Soo Kim , 황종현 Jong-hyun Hwang , 한승전 Seung Zeon Han |
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| Abstract |
| To study the effect of Al and Zr contents on the microstructural changes and tensile properties of Ni-Al-Bronze alloy, seven specimens were cast with different Al and Zr contents. The microstructure observation revealed that all specimens were composed of β` and κ phases in a α matrix. With increasing Al and Zr contents, the tensile strength of the Ni-Al-Bronze increased, due to an increase in the β` and κ phase fraction and grain refinement, but the elongation behavior of the Ni-Al-Bronze declined. Furthermore, the excessive addition of Zr caused a reduction in tensile strength and ductility. A successful combination of tensile strength and ductility, 688 MPa-23% was achieved by the controlled addition of Zr to Ni-Al-Bronze.
(Received November 10, 2016; Accepted March 13, 2017) |
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| Key Words |
| Ni-Al-bronze, cast alloy, grain refinement, mechanical properties, microstructure |
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