Affiliation:
1. Korea Advanced Institute of Science and Technology
2. Korea Advanced Institute of Science and Technology (KAIST)
Abstract
The dynamic response of the turbine blade materials is indispensable for analysis of
erosions of turbine blades as a result of impulsive loading associated with gas flow. This paper is
concerned with the dynamic material properties of the Inconel 718 alloy which is widely used in the
high speed turbine blade. The dynamic response at the corresponding level of the strain rate should be
acquired with an adequate experimental technique and apparatus due to the inertia effect and the
stress wave propagation. In this paper, the dynamic response of the Inconel 718 at the intermediate
strain rate ranged from 1/s to 400/s is obtained from the high speed tensile test and that at the high
strain rate above 1000/s is obtained from the split Hopkinson pressure bar test. The effects of the
strain rate on the dynamic flow stress, the strain rate sensitivity and the failure elongation are
evaluated with the experimental results. Experimental results from both the quasi-static and the high
strain rate up to 3000/s are interpolated in order to construct the constitutive relation that should be
applied to simulate the dynamic behavior of the turbine blade made of the Inconel 718.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
19 articles.
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