Sang-Myung Cho

Enhancement of Microstructural and Tensile Isotropy for Ti–6Al–4V and Ti–6Al–2Sn–2Zr–2Mo–2Cr Alloys Deposited with Wire Arc Additive Manufacturing and Interlayer Peening

Sungwon Hwang, Xian Guo, Donghyeon Choi, Jimin Nam et autres

kr, cn, us (code pays fourni par la source)

Wire arc additive manufacturing method for Ti–6Al–4V alloy to improve the grain refinement efficiency and mechanical properties

A.K. Maurya, Jong‐Taek Yeom, Jae H. Kim, Chan Hee Park et autres

Wire and arc additive manufacturing (WAAM) technique has introduced a novel approach for producing complex Ti–6Al–4V parts with metric dimensions. However, the produced part leads to the development of a strong texture and anisotropic mechanical properties due to the formation of large …

kr (code pays fourni par la source)

Enhancing Tensile Properties of Wire-Arc Additively Manufactured Ti-6Al-4 V Deposits Via Cryogenic Vaporised Ar Shielding/Cooling

Xian Guo, Muralimohan Cheepu, Jieun Yu, Sang-Myung Cho et autres

kr (code pays fourni par la source)

Effect of Welding Speed on Microstructure and Anisotropic Properties of Wire-Arc Additive-Manufactured Ti-6Al-4V alloy

Xian Guo, Jieun Yu, Muralimohan Cheepu, Sang-Myung Cho et autres

kr (code pays fourni par la source)

Effect of heat input on microstructure and mechanical property of wire-arc additive manufactured Ti-6Al-4V alloy

Xian Guo, Jeong Mok Oh, Junghoon Lee, Sang-Myung Cho et autres

kr (code pays fourni par la source)

A Study on the Defect Detection Algorithm by Interval Statistical Processing Method of Arc Welding Waveform

Woo-Hyeon Ju, Hyeong-Chang Ryu, Jong-Jung Lee, Yong-Hwan Park et autres

Defects in flux cored arc welding (FCAW) using CO 2 gas not only deteriorate the quality of the welded part, but also increase the overall quality cost (Q-cost) due to the need for maintenance and welding.Destructive inspection and non-destructive inspection are two …

kr (code pays fourni par la source)

A Study on the Measuring Method of Work Parameters to Evaluate the Skill of FCAW Welding Trainee

Woo-Hyeon Ju, Hyeong-Chang Ryu, Sang-Myung Cho

On industrial sites, FCAW is mostly performed by welders.In general, welder functional level evaluation is performed based on the appearance and mechanical testing of beads after welding.However, the actual welding quality obtained in the field is determined by the fluctuating characteristics of …

kr (code pays fourni par la source)

Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

Jung Hyun Park, Muralimohan Cheepu, Sang-Myung Cho

The welding market is changing globally, becoming eco-friendly, robotized and automated. The tungsten inert gas welding (TIG) process is indispensable in industries that require high-quality welds with the absence of spatter and fumes. However, the production rate of TIG welding is very …

kr (code pays fourni par la source)

Microstructural Characteristics of Wire Arc Additive Manufacturing with Inconel 625 by Super-TIG Welding

Muralimohan Cheepu, Chang Ik Lee, Sang-Myung Cho

kr (code pays fourni par la source)

A Study on Deformation According to Welding Speed of Root Pass in GTAW Butt Joint Welding

Chang-Min Yu, Jung Hyun Park, Gi-Jeong Seo, Sang-Myung Cho

In carbon steel butt joint welding, uniform back bead formation and reduction of weld deformation are important.In most industrial sites, Ceramic backing is used for V-grooves for uniform back bead formation in FCAW and SAW.In this case, because the root pass has …

kr (code pays fourni par la source)

A Study on Process Robustness of Lap Joint Fillet Welding in GTAW Using C Type Filler

S. B. KIM, Gi-Jeong Seo, Woo-Hyeon Ju, Sang-Myung Cho

Thin plate stainless steel is mainly used for lap joint fillet welding in GTAW and GMAW pro-cesses.However, due to the machining tolerance of the product, gaps are generated, and the weld line of the product before welding is not consistent.As a result, …

kr (code pays fourni par la source)

A Comparison of Hot Cracking in GTAW and FCAW by Applying Alloy 625 Filler Materials of 9% Ni Steel

Ki Beom Na, Chang Ik Lee, Jung Hyun Park, Sang-Myung Cho

Recently, demand for LNG storage and fuel tanks has been increasing due to the International Maritime Organization(IMO) regulations on sulfur oxides and greenhouse gas emission.In the production of LNG tanks, 9% Ni steel is used and Alloy 625 or Hastelloy wire are …

kr (code pays fourni par la source)