Results 31 to 40 of about 13,079 (259)

The fatigue damage evaluation of gear in sugarcane presser using higher order ultrasonic nonlinear coefficients

Results in Physics, 2018
The fatigue damage of gear in sugarcane presser is one of the most common damages, which is very difficult to detect in sugar factory. The nonlinear ultrasonic technique is used to evaluate the fatigue damage of gear in this paper.
Hanying Mao, Yuhua Zhang, Hanling Mao, Zhenfeng Huang, Jianwen Fan, Xinxin Li, Xiaoping Li   +6 more
doaj   +1 more source

Nonlinear Ultrasonic Characterization for Intergranular Corrosion Susceptibility of 304 Austenitic Stainless Steel

Cailiao gongcheng, 2017
The variation law of nonlinear ultrasonic parameters for the samples sensitized at 650℃ for 2, 6, 10h was discussed using nonlinear ultrasonic testing technique and XRD pattern as well as microstructure.
HOU Tian-yu, LI Ping, CHEN Lei, ZHAO Jie, LI Ting-ju   +4 more
doaj   +1 more source

Influence of Microstructural Changes’ Effects on the Linear and Nonlinear Ultrasonic Parameters of Cast Stainless Steels

Applied Sciences, 2020
In this research, some nondestructive ultrasonic techniques were employed to inquire into the effect of microstructural changes induced by thermal aging and cold work on the ultrasonic response. As thermal embrittlement is a risk to the safety of nuclear
Yu-Ju Lin, Che-Hua Yang, Jiunn-Yuan Huang   +2 more
doaj   +1 more source

Assessment of Material Dislocation Damage by Nonlinear Ultrasound [PDF]

MATEC Web of Conferences, 2020
Under harsh environment or during service, the mechanical properties of materials or structure will deteriorate. Most of the simulations exhibit the phenomenon of nonlinearity by introducing the actual small defects, without considering dislocation.
Zhan Zaifu, Wang Shen, Huang Songling, Zheng Yang, Wang Fuping, Zhao Wei   +5 more
doaj   +1 more source

Nonlinear Ultrasonic Guided Wave Method Using Semi-Analytical Finite Element (SAFE) Technique on a Damaged SWO-V Spring Coil

Metals, 2021
This work presents a non-destructive method for quantitative essessment of fatigue damage of materials with linear elastic properties using nonlinear ultrasonic techniques.
Jeongnam Kim, Junpil Park, Bo Zhu, Younho Cho   +3 more
doaj   +1 more source

Numerical Simulation of Nonlinear Lamb Waves Used in a Thin Plate for Detecting Buried Micro-Cracks

Sensors, 2014
Compared with conventional linear ultrasonic inspection methods, which are sensitive only to severe defects, nonlinear ultrasonic inspection methods are better for revealing micro-cracks in thin plates.
Xiang Wan, Qing Zhang, Guanghua Xu, Peter W. Tse   +3 more
doaj   +1 more source

Crack Detection of Threaded Steel Rods Based on Ultrasonic Guided Waves

Sensors, 2022
Fatigue cracks are typical damage of threaded steel rods under dynamic loads. This paper presents a study on ultrasonic guided waves-based, fatigue-crack detection of threaded rods.
Kunhong Peng, Yi Zhang, Xian Xu, Jinsong Han, Yaozhi Luo   +4 more
doaj   +1 more source

Nonlinear ultrasonic characterization of γ΄ phase evolution in DZ411 alloy after long-term aging

Cailiao gongcheng
To explore the feasibility of the nonlinear ultrasonic method in the aging microstructure evolution application of directionally solidified nickel-based superalloy， DZ411 directionally solidified nickel-based superalloy is studied.The microstructure ...
YANG Gangzhengliang, LI Ping, CAO Tieshan, ZHAO Jie   +3 more
doaj   +1 more source

Factors of Nonlinear-ultrasonic Detection and Its Application to HR3C Fireside Corrosion

Cailiao gongcheng, 2016
Based on the discussion of the factors influencing the nonlinear ultrasonic testing, the feasibility of nondestructive evaluation of HR3C fireside corrosion was investigated using nonlinear ultrasonic testing.
QIN Peng, LI Ping, HOU Tian-yu, ZHAO Jie, LI Ting-ju   +4 more
doaj   +1 more source

Properties of GH4169 Superalloy Characterized by Nonlinear Ultrasonic Waves

Advances in Materials Science and Engineering, 2015
The nonlinear wave motion equation is solved by the perturbation method. The nonlinear ultrasonic coefficients β and δ are related to the fundamental and harmonic amplitudes.
Hongjuan Yan, Chunguang Xu, Dingguo Xiao, Haichao Cai   +3 more
doaj   +1 more source