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Korean Journal of Metals and Materials > Volume 55(8); 2017 > Article
Korean Journal of Metals and Materials 2017;55(8): 537-543. doi: https://doi.org/10.3365/KJMM.2017.55.8.537
니알브론즈의 기계적 특성에 미치는 알루미늄 및 지르코늄 함량의 영향
안지혁1, 김동욱2, 김민수1, 황종현2, 한승전1
1한국기계연구원 부설 재료연구소 소재실용화연구실
2현대중공업 생산기술연구소
Effect of Al and Zr Contents on Mechanical Properties of Ni-Al-Bronze
Jee Hyuk Ahn1, Dong Wook Kim2, Min Soo Kim1, Jong-Hyun Hwang2, Seung Zeon Han1
1Commercialization Research Division, Korea Institute of Materials Science, Changwon 51508, Republic of Korea
2Industrial Technology Institute, Corporate Technology Institute, Hyundai Heavy Industries Co., Ltd, Ulsan 682-792, Republic of Korea
Correspondence  Seung Zeon Han ,Tel: +82-55-280-3331, Email: szhan@kims.re.kr
Received: 10 November 2016;  Accepted: 13 March 2017.  Published online: 1 August 2017.
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.
Keywords: Ni-Al-bronze, cast alloy, grain refinement, mechanical properties, microstructure
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