scholarly journals Determination of the Influence of Laser Welding Parameters on the Weld Quality Assurance of Heat-Resistant Alloys

2021 ◽  
Vol 9 (12) ◽  
pp. 612-615
Author(s):  
Artemii Bernatskyi
Keyword(s):  
Quality Assurance ◽  
Laser Welding ◽  
Welded Joints ◽  
Welded Joint ◽  
Welding Parameters ◽  
Joint Structure ◽  
Heat Resistant ◽  
Methodological Approaches ◽  
Keywords Laser

Abstract: In this study, the method of determining the influence of laser welding parameters on the quality provisions of welded joints made with multicomponent heat-resistant alloys was developed. The regularities of the formation of the welded joint structure of multicomponent heat-resistant alloys obtained by laser welding have been studied. The causes and methodological approaches to eliminate defects in the form of hot cracks were identified. Keywords: laser welding, multicomponent alloys, heat-resistant alloys, welded joints, quality

scholarly journals Development of technology for robotic laser welding of thin-walled products from heat-resistant alloys

2019 ◽  
Vol 298 ◽  
pp. 00010
Author(s):  
S.E. Krylova ◽  
M.I. Goltyapin ◽  
S.P. Olesnin ◽  
V.A. Zavyalov
Keyword(s):  
Laser Welding ◽  
Welded Joints ◽  
Comparative Studies ◽  
Welded Joint ◽  
Heat Resistant ◽  
Thin Walled ◽  
Heat Resistant Steels ◽  
Technological Strength

The results of testing the modes of robotic laser welding of spatial welded joints of thin-walled products from heat-resistant steels are considered. Comparative studies of the influence of the parameters of various methods of industrial welding on the metallography of the weld and the technological strength of the welded joint are presented. The resistance of welded joints against the formation of crystallization (hot) cracks is evaluated.

Effect of Laser Welding Parameters of DUPLEX 2205 Steel Welds on Fatigue Life

2014 ◽  
Vol 223 ◽  
pp. 11-18 ◽  
Author(s):  
Robert Sołtysiak
Keyword(s):  
Fatigue Life ◽  
Laser Welding ◽  
Welded Joints ◽  
Fatigue Tests ◽  
Parent Material ◽  
Welding Parameters ◽  
Test Results ◽  
Optimum Parameters ◽  
Steel Welds

This paper presents the results of the fatigue tests carried out on laser welded joints of DUPLEX 2205 steel (X2CrNiMoN22-5-3 according to PN-EN 10027-1:2007). The butt-welded joints were made using an Nd-YAG disk laser with no filler for two different welding parameters. The parameters were selected based on previous tests (according to PN-EN ISO 15614-11: 2005) conducted for joints made with more than ten welding parameters.The tests carried out provided a basis for the determination of optimum parameters for laser welding of DUPLEX 2205 steel in terms of fatigue life. Additionally, the fatigue test results were related to the fatigue life of samples taken from the parent material.

scholarly journals Influence of welding method on microstructural creation of welded joints  

2011 ◽  
Vol 57 (Special Issue) ◽  
pp. S50-S56 ◽  
Author(s):  
P. Čičo ◽  
D. Kalincová ◽  
M. Kotus
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Structural Phase ◽  
Welding Parameters ◽  
Welding Method ◽  
Welding Technology ◽  
Metal Arc Welding

This paper is focused on the analysis of the welding technology influence on the microstructure production and quality of the welded joint. Steel of class STN 41 1375 was selected for the experiment, the samples were welded by arc welding including two methods: a manual one by coated electrode and gas metal arc welding method. Macro and microstructural analyses of the experimental welded joints confirmed that the welding parameters affected the welded joint structure in terms of the grain size and character of the structural phase.

scholarly journals The effect of welded joint properties on the surface characteristics of laser-welded 2205 duplex stainless steel

2018 ◽  
Vol 10 (9) ◽  
pp. 168781401879744 ◽  
Author(s):  
Shanshan Hu ◽  
Dongrui Zheng ◽  
Guolin Zhao ◽  
Guangliang Li ◽  
Hongqun Tang
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Surface Quality ◽  
Welded Joints ◽  
Welded Joint ◽  
Surface Characteristics ◽  
Welding Parameters ◽  
Joint Properties ◽  
Welding Surface

Welded joints of poor welding surface quality are sensitive to stress concentrations, affecting both the tensile strength of workpieces and the fluidity of liquids and gases in pressure and liquid containers. Orthogonal experiments involving the laser welding of 1-mm-thick duplex stainless steel sheets were conducted using different electric current, pulse width and frequency values in order to analyse the effect of welding properties on the surface characteristics of the welded joints. Rapid judgement regarding the welded joint properties was made based on the observed welding surface quality. The results show that an even phase proportion and grain refinement are not necessarily guaranteed to provide good welding surface quality. A satisfactory welding surface quality characterised by a smaller spot pitch or spot pitch difference, smaller weld width, reduced surface roughness and valley depth of surface waviness implies better welded joint mechanical characteristics and a more even microstructure. The specimen with the most suitable welding parameters and the greatest heat input can reach the lowest volume fraction of ferrite phase of 42.5% and the highest tensile strength of 848 MPa, and its surface quality is the best.

scholarly journals Production and Properties of Electron-Beam-Welded Joints on Ti-TiB Titanium Alloys

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 522 ◽  
Author(s):  
Petro Loboda ◽  
Constantine Zvorykin ◽  
Volodymyr Zvorykin ◽  
Eduard Vrzhyzhevskyi ◽  
Tatjana Taranova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Welded Joints ◽  
Welded Joint ◽  
Tensile Tests ◽  
Structural Features ◽  
Butt Joint ◽  
Welding Parameters ◽  
Strengthening Effect ◽  
Initial State ◽  
Fracture Character

In this article, structural features of Ti-TiB and (α+β) Ti alloys in the initial state, in the weld and in the heat-affected zone of electron beam welds were investigated. The influences of welding parameters, such as influence of the electron beam velocity, preheating of the welded alloys and the subsequent annealing of the welded joint on the its microstructure, and the mechanical strength and ductility of the critical elements of the joint were studied by scanning electron microscopy using microprobe Auger spectral and X-ray diffraction analysis and tensile tests. It has been shown that the conditions for rapid crystallization of the material from the melt of the weld contribute to refining of reinforcing fibers of TiB and its hardening in comparison with the starting material Ti-TiB. Besides that, influences of the preferential orientation of TiB reinforcing microfibers (along and across the welded butt joint) on the mechanical properties of the welded joint were investigated bz tensile testing. Using the methods of fractographic analysis, the effect of the boron-containing phase on the fracture character of Ti-TiB welded joints was established. It was shown that, along with the strengthening effect, TiB fibers cause embrittlement of the material.

scholarly journals An Investigation on Laser Welding Parameters on the Strength of TRIP Steel

2021 ◽  
Vol 67 (1-2) ◽  
pp. 45-52
Author(s):  
S Khot Rahul ◽  
T Venkateshwara Rao ◽  
Natu Harshad ◽  
H N Girish ◽  
Tadashi Ishigaki ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Laser Welding ◽  
High Power ◽  
Heat Affected Zone ◽  
Trip Steel ◽  
Arc Welding ◽  
Laser Power ◽  
Welded Joint ◽  
Incident Angle ◽  
Welding Parameters

The energy required for joining steel segments by using laser welding is relatively very low compared with arc welding, gas welding, or any other conventional welding techniques. Moreover, the rapid cooling may create a significant effect on different regions, such as the fusion zone (FZ), heat affected zone (HAZ), and base metal (BM), and in turn affect different parameters. In this study, the characteristics of the laser-welded joint were investigated by varying laser power, welding velocity and incident angle, and tensile strength. In our, experiments. the microhardness was increased by varying the power of laser welding. The strength of the joint was increased to 549 MPa with 2200 W high power, 30 mm/s velocity, and 80º laser incident angle. By increasing the power and velocity of the laser, the welding gun strength was improved; conversely, the angle of laser incident on the welding location decreased while its strength was increased.

scholarly journals Influence of Parameters of Laser Beam Welding on Structure of 2205 Duplex Stainless Steel

2019 ◽  
Vol 19 (1) ◽  
pp. 21-31 ◽  
Author(s):  
M. Landowski
Keyword(s):  
Stainless Steel ◽  
Laser Beam ◽  
Laser Welding ◽  
Duplex Stainless Steel ◽  
Welded Joints ◽  
Laser Beam Welding ◽  
Welding Parameters ◽  
Processing Technologies ◽  
High Level ◽  
The Impact

AbstractLaser welding is used in modern industry, having many advantages comparing to traditional welding technologies. Nowadays, industry sectors such as shipbuilding, automotive and aviation can’t be imagined without laser processing technologies. Possibility of increase of welded joint properties, autogenous welding and high level of process automation makes the technology of laser welding perspective part of the industry. Physical multidimensional processes complexity requires a deeper understanding of the impact of laser welding parameters on the quality of welded joints for industrial implementation. The paper presents results of microstructure investigations of laser beam welded stainless steel under various welding parameters. Welded joints was achieved by Ytterbium fiber laser type without the use of the filler material. Material for test was 2205 ferritic-austenitic duplex stainless steel (DSS) plates with thickness of 8 mm in delivery condition. The objectives of this research was to investigate influence of laser welding parameters on weld geometry of butt-welded joints. Investigations of bead shape revealed correlation between laser beam focus position and weld penetration depth.

Laser Welding of Stainless Steel 321 in Different Welding Positions

2021 ◽  
Vol 313 ◽  
pp. 106-117
Author(s):  
A. Bernatskyi ◽  
O.M. Berdnikova ◽  
V. Sydorets ◽  
Valery Kostin ◽  
O. Kushnarova
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Welded Joints ◽  
Mechanical Characteristics ◽  
Welded Joint ◽  
Chemical Elements ◽  
Vertical Position ◽  
Steel Aisi ◽  
Aisi 321 ◽  
Stainless Steel Aisi

It was revealed that spatial position during laser welding of AISI 321 stainless steel influences the processes in the weld pool and the process of its crystallization. The geometry, structure, distribution of chemical elements depend on the cooling rate of the welded joint, which varies in different spatial positions during laser welding of stainless steel AISI 321. To achieve the lowest variance of results and the maximum values of mechanical characteristics of the welded joints of AISI 321 stainless steel it is recommended to produce laser welding in a vertical position.

scholarly journals Effect of Laser Welding Parameters on Formation of NiTi Shape Memory Alloy Welds

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Wei Wang ◽  
Xiaohong Yang ◽  
Hongguang Li ◽  
Fuzhong Cong ◽  
Yongbing Liu
Keyword(s):  
Laser Welding ◽  
Shape Memory ◽  
Welding Speed ◽  
Welded Joints ◽  
Heat Input ◽  
Continuous Wave ◽  
Niti Alloy ◽  
Welding Parameters ◽  
Niti Shape Memory Alloy ◽  
Flat Plates

In this work experimental trials of welding of NiTi flat plates with 2.0 mm thickness were conducted using a 4.5 kW continuous wave (CW) Nd:YAG laser. The influences of laser output power, welding speed, defocus amount and side-blow shielding gas flow rate on the morphology, welding depth and width, and quality of the welded seam were investigated. Meanwhile, the effects of heat input on the mechanical and functional properties of welded joints were studied. The results show that laser welding can take better formation in NiTi alloys. The matching curves with laser power and welding speed affecting different formation of welds were experimentally acquired, which can provide references for laser welding and engineering application of NiTi alloy. The heat input has obvious effects on the ultimate tensile strength (UTS) and shape memory behavior of the welded joints.

scholarly journals اختيار نظام لحام صفائح من النيكل بالليزر وتأثير بارامترات هذا النظام في أبعاد الدرزات اللحامية الناتجة

2008 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
عصام موسى
Keyword(s):  
Laser Beam ◽  
Laser Welding ◽  
Weld Metal ◽  
Cross Sections ◽  
Welded Joints ◽  
Welded Joint ◽  
Nickel Plate ◽  
Micro Structure ◽  
Focusing Distance

The effect of Laser welding system’s parameters on the dimensions of Nickel welded joint with thickness not more than (1.0 mm) was studied. The principal parameters of impulsed Laser in this case , which had influence on the welded spot’s dimensions ( spot’s diameter D & penetration h ) , are : the power of Laser beam , impulse time & the focusing distance of Laser beam to the welded joint. It was resulted that the values of dimension ( h ) increased (with high accelerating ) by the increasing of Laser beam’s power & impulse time & the decreasing of focusing distance , but the values of dimension D increased very slowly by the changes of above – mentioned parameters , and as result the values of melting form’s coefficient (Ψ = D / h ) decreased & reached the minimum when the melting penetration was about 1.0 mm ( the thiclness of Nickel plate ) . The micro-structure studying of cross sections in the welded joints showed that if the power of Laser beam was so high that the tmperature of welded spot was so high than the meting point of welded metal, the latest one obsorbed a lot of gases from the surrounded atmosphere and variuos defects were noticed in this weld metal. So, it’s too important to use a sheilding gas ( like Argon ) to improve the reaction of these gases with the weld metal .

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