scholarly journals Characterizing Microstructural Evolution of TP304 Stainless Steel Using a Pulse-Echo Nonlinear Method

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1395 ◽  
Author(s):  
Yichen Liu ◽  
Xiongbing Li ◽  
Guangdong Zhang ◽  
Shuzeng Zhang ◽  
Hyunjo Jeong
Keyword(s):  
Stainless Steel ◽  
Microstructural Evolution ◽  
Ultrasonic Method ◽  
Nonlinear Parameter ◽  
304 Stainless Steel ◽  
Nonlinear Method ◽  
Nonlinear Parameters ◽  
Experimental Process ◽  
The Absolute ◽  
Pulse Echo

Tube/Pipe (TP) 304 stainless steel has been widely used in industry, but a change in its microstructures may endanger its service safety, and it is essential to evaluate its microstructural evolution. In this work, a pulse-echo nonlinear method is proposed to characterize the microstructural evolution of the TP304 stainless steel. The detailed pulse-echo nonlinear experimental process is presented, and it is shown that the absolute nonlinear parameter can be determined when the effect of attenuation is taken into account. The microstructural evolution of TP304 stainless steel is artificially controlled by annealing treatments before it is evaluated by using nonlinear ultrasonic method and metallographic method. The results show that the grain sizes increase as the annealing time increases, which leads to the performance degradation of the TP304 steel and an increase in the nonlinear parameters, with the reason discussed considering the variation in the microstructure. The present pulse-echo nonlinear method is easier to conduct than the traditional transmission-through method and the absolute nonlinear parameter can be determined for quantitative characterization. The variation in determined nonlinear parameters provides a reference to evaluate the microstructural evolution of TP304 stainless steel.

scholarly journals Assessment of sensitization in AISI 304 stainless steel by nonlinear ultrasonic method

2013 ◽  
Vol 26 (5) ◽  
pp. 545-552 ◽  
Author(s):  
Saju T. Abraham ◽  
S. K. Albert ◽  
C. R. Das ◽  
N. Parvathavarthini ◽  
B. Venkatraman ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ultrasonic Method ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Nonlinear Ultrasonic ◽  
Nonlinear Ultrasonic Method

A simulation model of ultrasonic wave changes due to irradiation-induced microstructural evolution of thick 304 stainless steel blocks

2013 ◽  
Vol 441 (1-3) ◽  
pp. 503-509 ◽  
Author(s):  
Junji Etoh ◽  
Mitsuyuki Sagisaka ◽  
Takashi Matsunaga ◽  
Yoshihiro Isobe ◽  
Taira Okita
Keyword(s):  
Stainless Steel ◽  
Simulation Model ◽  
Ultrasonic Wave ◽  
Microstructural Evolution ◽  
304 Stainless Steel

scholarly journals Absolute Measurement of Material Nonlinear Parameters Using Noncontact Air-Coupled Reception

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 244
Author(s):  
Hyunjo Jeong ◽  
Sungjong Cho ◽  
Shuzeng Zhang ◽  
Xiongbing Li
Keyword(s):  
Reference Sample ◽  
Absolute Measurement ◽  
Nonlinear Parameter ◽  
Nonlinear Parameters ◽  
Parameter Ratio ◽  
Layer Medium ◽  
The Absolute ◽  
Material Nonlinear ◽  
Nonlinear Elastic ◽  
Selection Of

Nonlinear ultrasound is often employed to assess microdamage or nonlinear elastic properties of a material, and the nonlinear parameter is commonly used to quantify damage sate and material properties. Among the various factors that influence the measurement of nonlinear parameters, maintaining a constant contact pressure between the receiver and specimen is important for repeatability of the measurement. The use of an air-coupled transducer may be considered to replace the contact receiver. In this paper, a method of measuring the relative and absolute nonlinear parameters of materials is described using an air-coupled transducer as a receiver. The diffraction and attenuation corrections are newly derived from an acoustic model for a two-layer medium and the nonlinear parameter formula with all corrections is defined. Then, we show that the ratio of the relative nonlinear parameter of the target sample to the reference sample is equal to that of the absolute nonlinear parameter, and this equivalence is confirmed by measurements on three systems of aluminum samples. The proposed method allows the absolute measurement of the nonlinear parameter ratio or the nonlinear parameter without calibration of the air-coupled receiver and removes restrictions on the selection of reference samples.

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