Zobrazeno 1 - 10 of 27 pro vyhledávání: '"Hun-Hee Kim"'
1
Akademický článek
Development of Maximum Residual Stress Prediction Technique for Shot-Peened Specimen Using Rayleigh Wave Dispersion Data Based on Convolutional Neural Network
Autor: Yeong-Won Choi, Taek-Gyu Lee, Yun-Taek Yeom, Sung-Duk Kwon, Hun-Hee Kim, Kee-Young Lee, Hak-Joon Kim, Sung-Jin Song
Publikováno v: Materials, Vol 16, Iss 23, p 7406 (2023)
Shot peening is a surface treatment process that improves the fatigue life of a material and suppresses cracks by generating residual stress on the surface. The injected small shots create a compressive residual stress layer on the material’s surfa
Externí odkaz: https://doaj.org/article/a732f96f5fa9434b967d3e6c78d0071c
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2
Akademický článek
Nondestructive Evaluation of Residual Stress in Shot Peened Inconel Using Ultrasonic Minimum Reflection Measurement
Autor: Yeong-Won Choi, Taek-Gyu Lee, Yun-Taek Yeom, Sung-Duk Kwon, Hun-Hee Kim, Kee-Young Lee, Hak-Joon Kim, Sung-Jin Song
Publikováno v: Materials, Vol 16, Iss 14, p 5075 (2023)
Shot peening is a process wherein the surface of a material is impacted by small, spherical metal shots at high velocity to create residual stresses. Nickel-based superalloy is a material with high strength and hardness along with excellent corrosion
Externí odkaz: https://doaj.org/article/4ce3a1ce6c6145aaa9eb28e25f7c45ec
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3
Akademický článek
Improved Ultrasonic Dead Zone Detectability of Work Rolls Using a Convolutional Neural Network
Autor: Yun-Taek Yeom, Hun-Hee Kim, Jinhyun Park, Hak-Joon Kim, Sung-Jin Song
Publikováno v: Applied Sciences, Vol 12, Iss 10, p 5009 (2022)
Rolled carbon steel sheets used in industrial and construction sites are formed by passing metal stock between two rotating rolls using a rolling mill, and the work roll is an essential part of the rolling mill. As the work rolls are in direct contac
Externí odkaz: https://doaj.org/article/97280a83f91046b5a43e06fe6ee6b9a2
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4
Akademický článek
Containment Liner Plate Void Defect Detection Technique Using Phased Array Ultrasonic Testing and Acoustic Resonance Method
Autor: Yun-Taek Yeom, Yeong-Won Choi, Hak-Joon Kim, Hun-Hee Kim, Jae-Suk Park, Sung-Woo Ryu, Sung-Jin Song
Publikováno v: Materials, Vol 15, Iss 4, p 1330 (2022)
The CLP (containment liner plate) of a nuclear power plant protects the internal system from the external environment and sudden changes in internal pressure or temperature, and it is a structure that blocks and protects radioactive materials leaking
Externí odkaz: https://doaj.org/article/f5da51f7840d40919e1964c24a0c3aab
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5
Akademický článek
Simulation Based Investigation of Focusing Phased Array Ultrasound in Dissimilar Metal Welds
Autor: Hun-Hee Kim, Hak-Joon Kim, Sung-Jin Song, Kyung-Cho Kim, Yong-Buem Kim
Publikováno v: Nuclear Engineering and Technology, Vol 48, Iss 1, Pp 228-235 (2016)
Flaws at dissimilar metal welds (DMWs), such as reactor coolant systems components, Control Rod Drive Mechanism (CRDM), Bottom Mounted Instrumentation (BMI) etc., in nuclear power plants have been found. Notably, primary water stress corrosion cracki
Externí odkaz: https://doaj.org/article/5f52fbf895f64c709f1afb18a3f3ffca
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8
Characterization of defects on rail surface using eddy current technique
Autor: Sung-Jin Song, Hun-Hee Kim, M. B. Kishore, J. W. Park, Se Gon Kwon
Publikováno v: Journal of Mechanical Science and Technology. 33:4209-4215
In the present study, using eddy current technique (ECT), we explored two kinds of defects commonly found in railroad monitoring. The first one is cracks initiated on the surface of rail head which slowly progresses into vertical rail plane, the seco
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::494976f1c305fc31f8834cfdbbf55623
https://doi.org/10.1007/s12206-019-0816-x
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10
Identification of nonregular indication according to change of grain size/surface geometry in nuclear power plant (NPP) reactor vessel (RV)-upper head alloy 690 penetration
Autor: Jin-Gyum Kim, Myung-Jo Jhung, Changkuen Kim, Hak-Joon Kim, Kyung-Cho Kim, Hun-Hee Kim
Publikováno v: Nuclear Engineering and Technology, Vol 49, Iss 7, Pp 1524-1536 (2017)
During the fabrication process of reactor vessel head penetration (RVHP), the grain size of the tube material can be changed by hot or cold work and the inner side of the tube can also be shrunk due to welding outside of the tube. Several nonregular
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc34ceab594c7d769f21bebd1f3541b5
http://www.sciencedirect.com/science/article/pii/S1738573317305296
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