Research on Weld Appearance of X70 Steel Joints Prepared by Laser-MAG Hybrid Welding Process for All-Position Root Welding

2015 ◽  
Vol 42 (4) ◽  
pp. 0403002
Author(s):  
雷正龙 Lei Zhenglong ◽  
杨雨禾 Yang Yuhe ◽  
李福泉 Li Fuquan ◽  
陈彦宾 Chen Yanbin ◽  
曾惠林 Zeng Huiling
Keyword(s):  
Welding Process ◽  
Hybrid Welding ◽  
Weld Appearance ◽  
Steel Joints

Fatigue Behaviour of Friction Stir Welded Steel Joints

2014 ◽  
Vol 891-892 ◽  
pp. 1488-1493 ◽  
Author(s):  
José Azevedo ◽  
Virgínia Infante ◽  
Luisa Quintino ◽  
Jorge dos Santos
Keyword(s):  
Base Material ◽  
Welding Process ◽  
Steel Structures ◽  
Fatigue Behaviour ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Welded Steel ◽  
Shipbuilding Industry ◽  
Friction Stir ◽  
Steel Joints

The development and application of friction stir welding (FSW) technology in steel structures in the shipbuilding industry provide an effective tool of achieving superior joint integrity especially where reliability and damage tolerance are of major concerns. Since the shipbuilding components are inevitably subjected to dynamic or cyclic stresses in services, the fatigue properties of the friction stir welded joints must be properly evaluated to ensure the safety and longevity. This research intends to fulfill a clear knowledge gap that exists nowadays and, as such, it is dedicated to the study of welded steel shipbuilding joints in GL-A36 steel, with 4 mm thick. The fatigue resistance of base material and four plates in as-welded condition (using several different parameters, tools and pre-welding conditions) were investigated. The joints culminate globally with defect-free welds, from which tensile, microhardness, and fatigue analyses were performed. The fatigue tests were carried out with a constant amplitude loading, a stress ratio of R=0.1 and frequency between 100 and 120 Hz. The experimental results show the quality of the welding process applied to steel GL-A36 which is reflected in the mechanical properties of joints tested.

scholarly journals Observation of Arc Behaviour in TIG/MIG Hybrid Welding Process

2020 ◽  
Vol 596 ◽  
pp. 012025
Author(s):  
Rose Alifah Ellyana Roslan ◽  
Sarizam Mamat ◽  
Pao Ter Teo ◽  
Firdaus Mohamad ◽  
Srinath Gudur ◽  
...  
Keyword(s):  
Welding Process ◽  
Hybrid Welding

scholarly journals Effects of robotic CO2 arc welding variables on penetration and microstructure of weld in C-80 grade steel

2010 ◽  
Vol 7 (1) ◽  
pp. 67-75
Author(s):  
Hamid Reza Ghazvinloo ◽  
Abbas Honarbakhsh-Raouf ◽  
Nasim Shadfar
Keyword(s):  
Weld Metal ◽  
Cross Sections ◽  
Arc Welding ◽  
Welding Process ◽  
Welding Current ◽  
Residual Austenite ◽  
Martensite Phase ◽  
Optical Observations ◽  
Bead Geometry ◽  
Steel Joints

Generally, the quality and properties of a weld joint is strongly influenced by welding variables during process. In order to achieve an ideal weld, it is important attention to bead geometry and microstructure evolution of weld metal. The effect of process variables on penetration and microstructure of C-80 steel joints produced by robotic CO2 arc welding was studied in present work. Different samples were produced by employing arc voltages of 23, 25 and 27 V, welding currents of 100, 110 and 120 A and welding speeds of 42, 62 and 82 cm/min. After welding process, geometric measurements were performed on welding specimens and the microstructural evolutions were investigated by optical observations of the weld cross sections. Results were clearly illustrated that increasing in welding current or arc voltage increases the depth of weld penetration. The highest penetration in this research was observed in 62 cm/min welding speed. The metallographic examinations also indicated that the microstructure of weld metal in all of specimens was composed mainly of martensite (M) and residual austenite (A) phases that a portion of martensite phase had been tempered.

Fiber Laser-TIG Hybrid Welding Process of 316 Stainless Steel Plate

Applied laser ◽  
2014 ◽  
Vol 34 (1) ◽  
pp. 46-50
Author(s):  
尹燕 Yin Yan ◽  
曾智 Zeng Zhi ◽  
他进国 Ta Jinguo ◽  
王占冲 Wang Zhanchong ◽  
张瑞华 Zhang Ruihua
Keyword(s):  
Stainless Steel ◽  
Fiber Laser ◽  
Steel Plate ◽  
Welding Process ◽  
Hybrid Welding ◽  
Stainless Steel Plate ◽  
316 Stainless Steel

Effect of shielding gas flow on welding process of laser-arc hybrid welding and MIG welding

2019 ◽  
Vol 38 ◽  
pp. 530-542 ◽  
Author(s):  
Xiaoyi Yang ◽  
Hui Chen ◽  
Zongtao Zhu ◽  
Chuang Cai ◽  
Chengzhu Zhang
Keyword(s):  
Gas Flow ◽  
Welding Process ◽  
Hybrid Welding ◽  
Mig Welding ◽  
Shielding Gas

scholarly journals Study for the Arc Phenomena of TIG-MIG Hybrid Welding Process by 3D Numerical Analysis Model

2012 ◽  
Vol 30 (4) ◽  
pp. 323-330 ◽  
Author(s):  
Shuhei KANEMARU ◽  
Tomoaki SASAKI ◽  
Toyoyuki SATO ◽  
Hisashi MISHIMA ◽  
Shinichi TASHIRO ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Welding Process ◽  
Hybrid Welding ◽  
Analysis Model

The Influence of Welding Parameters on Heat Transfer Efficiency of Hybrid Pulsed Nd: YAG/GTAW Welding

2015 ◽  
Vol 1088 ◽  
pp. 807-813
Author(s):  
Miao Xia Xie ◽  
Lin Jie Zhang
Keyword(s):  
Heat Transfer ◽  
Nd:Yag Laser ◽  
Welding Process ◽  
Transfer Efficiency ◽  
304 Stainless Steel ◽  
Welding Parameters ◽  
Hybrid Welding ◽  
Pulsed Nd:Yag Laser ◽  
Heat Transfer Efficiency ◽  
Cross Section Area

In this work, effects of major welding parameters, such as laser power, defocus distance of laser beam, inter-heat sources distance and welding speed, on weld geometry were investigated for pulsed Nd:YAG laser/GTAW hybrid welding of 304 stainless steel. Heat transfer efficiency of pulsed Nd:YAG laser/GTAW hybrid welding process was quantitativly analyzed based on rosenthal equation. Furthermore, melting efficiency was determined from the measured welding seams cross section area.

scholarly journals Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Kaifeng Wang ◽  
Piyush Upadhyay ◽  
Yuxiang Wang ◽  
Jingjing Li ◽  
Xin Sun ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Driving Force ◽  
Bond Formation ◽  
Welding Process ◽  
High Strength ◽  
Bimaterial Interface ◽  
Joint Interface ◽  
Friction Stir ◽  
Transmission Electron ◽  
Steel Joints

Friction stir scribe (FSS) welding as a recent derivative of friction stir welding (FSW) has been successfully used to fabricate a linear joint between automotive Al and steel sheets. It has been established that FSS welding generates a hook-like structure at the bimaterial interface. Beyond the hook-like structure, there is a lack of fundamental understanding on the bond formation mechanism during this newly developed FSS welding process. In this paper, the microstructures and phases at the joint interface of FSS welded Al to ultra-high-strength steel were studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that both mechanical interlocking and interfacial bonding occurred simultaneously during the FSS welding process. Based on SEM observations, a higher diffusion driving force in the advancing side was found compared to the retreating side and the scribe swept zone, and thermally activated diffusion was the primary driving force for the interfacial bond formation in the scribe swept region. The TEM energy-dispersive X-ray spectroscopy (EDXS) revealed that a thin intermetallic compound (IMC) layer was formed through the interface, where the thickness of this layer gradually decreased from the advancing side to the retreating side owing to different material plastic deformation and heat generations. In addition, the diffraction pattern (or one-dimensional fast Fourier transform (FFT) pattern) revealed that the IMC layer was composed of Fe2Al5 or Fe4Al13 with a Fe/Al solid solution depending on the weld regions.

Effect of ultrasonic pattern on weld appearance and droplet transfer in ultrasonic assisted MIG welding process

2018 ◽  
Vol 35 ◽  
pp. 368-372 ◽  
Author(s):  
Chao Chen ◽  
Chenglei Fan ◽  
Sanbao Lin ◽  
Xiaoyu Cai ◽  
Lei Zhou ◽  
...  
Keyword(s):  
Welding Process ◽  
Mig Welding ◽  
Droplet Transfer ◽  
Weld Appearance ◽  
Ultrasonic Assisted
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