High Temperature Aging TP347HFG Steel by Nonlinear Ultrasonic Detection Technology

doi:10.3901/JME.2019.12.058

Abstract

Abstract: Study of high temperature aging process and early damage is meaningful to TP347HFG steel due to its large brittleness and short stable expansion period. Nonlinear ultrasonic technology is sensitive to micro and nano scale damages and it has great applied potency in early damage examination.which limitted by its mechanism. The quantative analysis between aging time and Nonlinear ultrasonic coefficient is described and the mechanism is discussed based on the microstructure characteristics of aging steel samples. The results show that, with the increasement of aging time, the Nonlinear ultrasonic coefficient has a maximum point at 500 h and then increased monotonically. The tendency could be due to the formation and loss of coherency strain. The results provides a theoretical basis for nonlinear ultrasonic detection of TP347HFG steel under high temperature conditions.

Key words: high temperature aging, nonlinear ultrasonic wave, TP347HFG, ultra-supercritical unit

CLC Number:

TG142
TH212

YUAN Tingbi, NA Risu, CHANG Qing, YANG Xinjun, ZHANG Guangxing. High Temperature Aging TP347HFG Steel by Nonlinear Ultrasonic Detection Technology[J]. Journal of Mechanical Engineering, 2019, 55(12): 58-63.

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