日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 77, No. 5 (2013),
pp. 170-173

Tensile Rate Dependency of Mechanical Properties of Inconel 718 Nickel-Based Superalloy around Solidus Temperature

Shota Ogino1, Tsubasa Ohashi1, Naoki Kasuya1 and Makoto Yoshida2

1Graduate School of Creative Science and Engineering, Waseda University, Tokyo 169-8555
2Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Tokyo 169-0051

Abstract:

Nickel-based superalloys have been applied to gas turbine and aircraft jet engine parts due to superior high temperature strength and corrosion resistance. However, casting defect such as solidification cracking often occurs. In order to increase productivity of precision casting and various shape casting processes, predicting the occurrence of solidification cracking by using CAE (Computer Aided Engineering) should be essential. Therefore, it is necessary to obtain mechanical properties in the state of solid-liquid coexistence.
In the previous reports, high temperature mechanical properties were examined but tensile rate dependency wasn't examined. In this study, high temperature (around solidus temperature) mechanical properties and tensile rate dependency of their alloy were examined by using originally developed tensile test. [doi:10.2320/jinstmet.J2012054]


(Received 2012/9/18)

Keywords:

nickel-based superalloys, mechanical property, hot tear, stress-strain curve, semi-solid


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