Effects of Solution Temperature on Microstructure and Ultrasonic Properties of GH4169

CHEN Xi; XIONG Hongjian; WU Wei; WU Guanhua; ZHOU Zhenggan

doi:10.11973/wsjc201804002

Nondestructive Testing > 2018 > 40(4): 7-12. > DOI: 10.11973/wsjc201804002

CHEN Xi, XIONG Hongjian, WU Wei, WU Guanhua, ZHOU Zhenggan. Effects of Solution Temperature on Microstructure and Ultrasonic Properties of GH4169[J]. Nondestructive Testing, 2018, 40(4): 7-12. DOI: 10.11973/wsjc201804002

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Effects of Solution Temperature on Microstructure and Ultrasonic Properties of GH4169

1. Key Laboratory of Nondestructive Testing of Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China;
2. China Helicopter Research and Development Institute, Jingdezhen 333001, China;
3. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China

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Received Date: October 18, 2017

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Abstract

In this work the effects of solution temperature on microstructure and ultrasonic response of nickel-based super alloy GH4169 were examined. Characteristic parameters of grain size and shape were measured. Longitudinal wave echo method and collinear penetration method were used to test the samples, and the ultrasonic parameters, such as velocity, attenuation coefficient, and relative nonlinear coefficient, were calculated. The power and waveform index of intrinsic mode functions (IMFs) of backscattered signals dealt with empirical mode decomposition were calculated. Comparison between ultrasonic and microstructure data shows that the attenuation coefficient, velocity, and nonlinear coefficient could be used to make an effective identification of phase transition. The attenuation coefficient increased with the increase of grain size and was strongly sensitive to the change of grain size. Both power and waveform index of IMFs of backscattered signals could be used to estimate grain size, but they were difficult to characterize the axial ratio of grain.
- GH4169,
- microstructure,
- ultrasonic evaluation,
- empirical mode decomposition,
- attenuation coefficient,
- relative nonlinear coefficient

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