scholarly journals Weld Geometry Investigation on Dissimilar Boron Steel Laser Welded for TWB Application

2019 ◽  
Vol 16 (4) ◽  
pp. 7364-7374
Author(s):  
M. N. M. Salleh ◽  
M. Ishak ◽  
M. H. Aiman ◽  
M. M. Quazi ◽  
A. M. Hanafi
Keyword(s):  
Tensile Strength ◽  
Laser Welding ◽  
Low Power ◽  
Peak Power ◽  
Continuous Wave ◽  
Fibre Laser ◽  
Boron Steel ◽  
Welding Parameters ◽  
Transition Line ◽  
Power Laser

The pulse wave (PW) mode is an excellent replacement for continuous wave (CW) mode f laser welding in the tailor-welded blank (TWB) application for the automotive ndustry. Due to its ability to produce higher peak power in low power laser pulse mode, he weld penetration and high weld quality can be achieved similarly to the utilization of very high power laser of CW mode. This present work was carried out to investigate the ffect of pulse laser welding parameters of a dissimilar thickness of boron steel for the TWB application. Low power fibre laser with 200 W average power was chosen in this xperimental work. Response surface method (RSM) was used for the design of xperiment (DOE) by applying Box-behnken design (BBD) since there were three rocess factors involved. The process factors are peak power (PP), welding speed (WS) nd focal position (FP) and tensile strength is the response for the weld joint. The metallurgical analysis was conducted at the cross section of sample possessing highest nd lowest tensile strength. Boron steel was successfully welded by using low power fibre aser with PW mode in butt joint configuration. It was found that the highest tensile trength possessed fracture located at the base metal, which is convincing the strength of he joint. For microstructure, finer grain produced at the centre of the fusion zone (FZ) ompared to the FZ near the transition line which produced coarser and medium grain. Finer grain size in FZ contributes to the higher microhardness value and tensile strength f the joint compared to the BM region.

scholarly journals The effect of pulse welding parameters on weld geometry of boron steel using low power fibre laser

2017 ◽  
Vol 11 (3) ◽  
pp. 2895-2905 ◽  
Author(s):  
K.I. Yaakob ◽  
◽  
M. Ishak ◽  
S.R.A. Idris ◽  
◽  
...  
Keyword(s):  
Low Power ◽  
Fibre Laser ◽  
Boron Steel ◽  
Welding Parameters ◽  
Weld Geometry ◽  
Pulse Welding

Study of Effect on Tensile Stress Test from Distortion of Fibre Laser Welded Ti6Al4V Using FEA

2011 ◽  
Vol 314-316 ◽  
pp. 1889-1894
Author(s):  
Yu Fan ◽  
Philip Shipway ◽  
Geoff Tansley ◽  
Zheng Chen
Keyword(s):  
Tensile Stress ◽  
Laser Welding ◽  
Tensile Test ◽  
Thin Plate ◽  
Stress Level ◽  
Continuous Wave ◽  
Stress Test ◽  
Welding Distortion ◽  
Fibre Laser

Distortion is one type of defect in the weld, which is troublesome for some reasons, especially in thin plate welding. Distortion was found in fibre laser welding processing for 0.7mm thickness Ti6Al4V plate. The purpose of this paper is to understand and evaluate the effect of distortion on stress level by FEA and tensile test. A group of 0.7mm Ti6Al4V plates welded using continuous wave fibre laser. FEA models were established for fibre laser welded Ti6Al4V in abaqus 6.7.

Study on Laser Welding of Phone Nuts

2013 ◽  
Vol 815 ◽  
pp. 778-781
Author(s):  
Xiao Hong Wu
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Laser Pulse ◽  
Laser Welding ◽  
Pulse Energy ◽  
Pulse Width ◽  
Peak Power ◽  
Laser Pulse Energy ◽  
304 Stainless Steel ◽  
Power Pulse

Used YAG pulse laser to weld 304 stainless steel nuts, studied about the parameters such as peak power, pulse width, defocus distance impacting on the performance of the joints welded by laser. The studies showed that the tensile strength and torque of the nuts increased as the peak power and the pulse width increased.Burn through in welding easy occur when laser pulse energy is too big, pulse width is too wide or defocus distance is too low.

scholarly journals The Study on Mechanical Strength of Titanium-Aluminum Dissimilar Butt Joints by Laser Welding-Brazing Process

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 712 ◽  
Author(s):  
Xiongfeng Zhou ◽  
Ji’an Duan ◽  
Fan Zhang ◽  
Shunshun Zhong
Keyword(s):  
Tensile Strength ◽  
Laser Welding ◽  
Welding Speed ◽  
Laser Power ◽  
Butt Joint ◽  
Interface Fracture ◽  
Welding Parameters ◽  
Fracture Roughness ◽  
Joint Properties ◽  
5A06 Aluminum Alloy

Laser welding–brazing of 5A06 aluminum to Ti6Al4V titanium in a butt configuration was carried out to discuss the influences of welding parameters on dissimilar joint properties. The effects of laser offset, welding speed, and laser power on the spreading length of the molten aluminum liquid, interface fracture zone width (IFZW), fracture roughness, intermetallic compounds (IMCs) thickness, and tensile strength were also investigated. The microstructure and fracture of the joint were also studied. The results show that the tensile strength of the joint is not only influenced by the thickness and type of IMCs, but also influenced by the spreading ability of the aluminum liquid, the fracture area broken at the Ti/fusing zone (FZ) interface, and the relative area of the brittle and ductile fracture in FZ. A dissimilar butt joint with an IMC thickness of 2.79 μm was obtained by adjusting the laser offset, welding speed, and laser power to 500 μm, 11 mm/s and 1130 W, respectively. The maximum tensile strength of the joint was up to 183 MPa, which is equivalent to 83% of the tensile strength of the 5A06 aluminum alloy.

Micro laser welding of polymer microstructures using low power laser diodes

2007 ◽  
Vol 33 (1-2) ◽  
pp. 198-205 ◽  
Author(s):  
T. Ussing ◽  
L. V. Petersen ◽  
C. B. Nielsen ◽  
B. Helbo ◽  
L. Højslet
Keyword(s):  
Laser Welding ◽  
Low Power ◽  
Laser Diodes ◽  
Power Laser ◽  
Polymer Microstructures ◽  
Micro Laser Welding

Investigation of the effect of low power laser used in photodynamic therapy for treatment of psoriasis

2012 ◽  
Vol 1 (4) ◽  
Author(s):  
Nafie A. Almuslet ◽  
Abdelmoniem E. Osman
Keyword(s):  
Photodynamic Therapy ◽  
Low Power ◽  
Plaque Psoriasis ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Electromagnetic Spectrum ◽  
Power Laser ◽  
Chronic Plaque Psoriasis ◽  
Low Level ◽  
Level Laser

AbstractThe objective of this study was to investigate the effect of power on low-level lasers used in photodynamic therapy (PDT) to treat chronic plaque psoriasis in a group of Sudanese patients.Twenty-four patients with chronic plaque psoriasis were randomly selected to enter this study from a total of 100 patients who attended the Khartoum Dermatology Teaching Hospital between 2010 and 2011. The lasers used for PDT were three continuous wave diode lasers in the red portion of the electromagnetic spectrum (671–675 nm) with output powers of 16, 50 and 100 mW to activate the chemical photosensitizer (LevulanThis study showed that 62% of the patients treated with 100 mW achieved complete clearance compared with 25% for those treated with 50 mW and 0% for those treated with 16 mW.The results showed that increasing the power of low-level laser in PDT increased the clearance of plaque psoriasis. PDT can be used as an alternative method for treatment of psoriasis.

Correlation of high power laser welding parameters with real weld geometry and microstructure

2017 ◽  
Vol 94 ◽  
pp. 59-67 ◽  
Author(s):  
Sang Liu ◽  
Gaoyang Mi ◽  
Fei Yan ◽  
Chunming Wang ◽  
Ping Jiang
Keyword(s):  
Laser Welding ◽  
High Power ◽  
Welding Parameters ◽  
High Power Laser ◽  
Power Laser ◽  
Weld Geometry
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