Modifying of microstructure and toughness in the weld metal prepared by welding wire containing nanosized titanium oxides

2021 ◽  
Vol 807 ◽  
pp. 140897
Author(s):  
Xiang Luo ◽  
Zidong Wang ◽  
Xiaohua Chen ◽  
Yanlin Wang ◽  
Guang Xu
Keyword(s):  
Weld Metal ◽  
Titanium Oxides ◽  
Welding Wire

Effect of Chemical Composition of Welding Wire and Low Temperature Steel Plate on the Weld Properties Made by SAW

2008 ◽  
Vol 580-582 ◽  
pp. 57-60
Author(s):  
Hee Joon Sung ◽  
Yeon Baeg Goo ◽  
Kyeong Ju Kim ◽  
Kee Young Choi
Keyword(s):  
Chemical Composition ◽  
Low Temperature ◽  
Weld Metal ◽  
Steel Plate ◽  
Butt Joint ◽  
Welding Wire ◽  
High Hardenability ◽  
Weld Metals ◽  
Weld Properties ◽  
Mo Content

Chemical composition effect on the weld properties for low temperature steel was evaluated. The alloy elements of interest at the weld metal were Cr and Mo, which come from the steel plate and welding wire, respectively. Both side one run SAW process was carried out in a Ygroove butt joint. Microstructure of the weld metal is strongly dependent on the chemical composition of the steel plate and the welding wire, due to high dilution. The microstructure of the weld metal became fine acicular ferrite by increasing Cr and Mo content because of high hardenability effect. The weld metal having Cr and Mo possessed the highest impact toughness at low temperatures among the weld metals studied. Cr seems to have more effect than Mo on the toughness of the weld metal.

Joining Aluminium to Titanium by MIG Welding-Brazing Process

2011 ◽  
Vol 284-286 ◽  
pp. 165-168
Author(s):  
Bo Chen ◽  
Hong Tao Zhang ◽  
Wen Jie Jiang
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
Intermetallic Compound ◽  
Weld Metal ◽  
Filler Metal ◽  
Compound Layer ◽  
Intermetallic Compound Layer ◽  
Mig Welding ◽  
Lap Joint ◽  
Welding Wire

With Al-Si welding wire ER4043, lap joint between aluminium and titanium alloy was made by MIG welding-brazing process with nocolok flux aiding filler metal in promoting metal wettability. A thin intermetallic compound layer was formed at the interface between the weld metal and titanium alloy and the layer mainly consits of TiAl3 phase. The tensile strength of the joint can reach 151MPa and fracture occurred in aluminium base metal.

The Microstructure of Laser Welded V-4Cr-4Ti Alloy after Ion Irradiation

2005 ◽  
Vol 475-479 ◽  
pp. 1491-1496 ◽  
Author(s):  
H. Watanabe ◽  
M. Nagamine ◽  
K. Yamasaki ◽  
Naoaki Yoshida ◽  
Nam-Jin Heo ◽  
...  
Keyword(s):  
Laser Welding ◽  
Weld Metal ◽  
Microstructural Evolution ◽  
High Purity ◽  
Ion Irradiation ◽  
Copper Ion ◽  
Titanium Oxides ◽  
Number Density ◽  
Tandem Accelerator ◽  
Habit Planes

Laser welded high purity V-4Cr-4Ti alloy (NIFS-HEAT2), fabricated by National Institute for Fusion Science (NIFS), was used for this study. Copper ion irradiation was carried out with the tandem accelerator at Kyushu University. The TEM samples were sliced from the welded materials and irradiated at 573 and 873K up to the dose of 12 dpa. The microstructure before irradiation showed that relatively large precipitates, which were commonly observed in NIFS-HEAT2, disappeared in the center of the weld metal. After the ion irradiation, fine titanium oxides with {100} habit planes were detected even at the dose of 0.75 dpa. However, less number density of these oxides were observed in the base metal after the same irradiation conditions. This means that the behaviors of oxygen atoms, which dissolved from the large precipitates during the laser welding, is essential to the microstructural evolution of welded V-4Cr-4Ti alloys.

scholarly journals Variation of Toughness and Porosity Formation in Weld Metal with Al Content in Self-Shielded Arc Welding Wire

2011 ◽  
Vol 29 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Kook-Soo Bang ◽  
Chan Park ◽  
Kil Woong ◽  
Woong-Seong Chang
Keyword(s):  
Weld Metal ◽  
Arc Welding ◽  
Welding Wire ◽  
Porosity Formation ◽  
Al Content

Investigation on DDC Susceptibility of 690 Nickel-Alloy Welding Wire

2017 ◽  
Author(s):  
Yu Gu ◽  
Bo Zuo ◽  
Junbao Zhang ◽  
Yifeng Huang ◽  
Yan Yu
Keyword(s):  
Weld Metal ◽  
Nuclear Power ◽  
Critical Strain ◽  
High Viscosity ◽  
Welding Parameters ◽  
Welding Wire ◽  
Metal Bath ◽  
Severe Condition ◽  
Gleeble 3500 ◽  
Welding Metal

690 nickel-based welding materials are widely applied on nuclear equipment manufacturing. While the nickel-based welding metal bath has the properties of high viscosity and poor fluidity, resulting in high susceptibility to welding cracking of the nickel-based weld metal, especially ductility dip cracking. As the nuclear key equipments serve in a severe condition combined with high pressure & temperature and corrosive atmosphere, the existence of micro crack would greatly affect the life expansion of the equipments. In this paper, WHS690M -alloy welding wire was developed in order to meet the requirement of CAP1400 nuclear power plant, which has good welding performance. Strain-to-fracture (STF) test based on Gleeble-3500 thermo-mechanical simulator was performed to evaluate the DDC susceptibility of Inconel 52M and WHS690M weld by different welding parameters. And combined with EBSD, the characteristics of grain orientation was also analyzed. The minimum critical strain in STF test appeared at 1050°C, and the value reached 3.2% for WHS690M while 2.1% for Inconel 52M. Furthermore, the critical strain for both WHS690M and Inconel 52M groove weld metal was about 2.0%, which was lower than cladding metal.

Effect of Transformation Temperature of Weld Metal on Welding Distortion

2008 ◽  
Author(s):  
Yasushi Morikage ◽  
Takahiro Kubo ◽  
Koichi Yasuda ◽  
Yoshiki Mikami ◽  
Masahito Mochizuki ◽  
...  
Keyword(s):  
Weld Metal ◽  
Welded Joints ◽  
Transformation Temperature ◽  
Welded Joint ◽  
Steel Structures ◽  
Angular Distortion ◽  
Welding Distortion ◽  
Uniform Heating ◽  
Welding Wire ◽  
Heating And Cooling

Welding distortion during welding is an inevitable outcome of weld metal shrinkage due to non-uniform heating and cooling in welded joints. Several studies have investigated methods of estimating and controlling welding distortion in order to construct steel structures correctly, easily and efficiently. In the present study, the effect of transformation expansion of the weld metal on welding distortion was investigated in order to develop a welding wire that reduces welding distortion. Concretely, experiments and numerical simulations were performed on the effect of the transformation temperature of the weld metal on angular distortion of a horizontal fillet welded joint. The results showed that angular distortion of the welded joint decreases when the martensitic transformation start temperature of the weld metal decreases in the range from 350°C to 450°C. Based on this result, a welding wire that is effective in reducing welding angular distortion was developed considering usability, weldability and the mechanical properties of welded joints.

Sign in / Sign up

Export Citation Format

Share Document