NDLI: Experimental and numerical investigation of laser hot wire welding

Content Provider	Springer Nature Link
Author	Liu, Wei Ma, Junjie Liu, Shuang Kovacevic, Radovan
Copyright Year	2015
Abstract	With respect to autogenous laser welding, laser welding assisted by a hot wire was capable of saving the consumption of laser power, tailoring the mechanical and physical properties of welds, and improving the gap-bridging capability. In this work, the influences of welding parameters were investigated to combine the positive aspects of laser beam and hot wire. Sound welds were obtained when the laser beam was focused inside the samples. The welding direction had a significant effect on the gap-bridging capability, while the offset distance between the laser focal spot and hot wire tip determined the stability of the feeding of the hot wire into the molten pool. The effect of hot wire on the temperature field and thermally induced residual stress of laser welding was investigated by using the finite element method. X-ray diffraction technique was used to measure the residual stress at the obtained weld beads, and a good agreement between the experimental and numerical results was achieved. Results showed that the transverse and longitudinal stresses prevailed in the laser hot wire welding process, and the thermal stress concentration occurred in the weld pool. When the hot wire voltage was lowered, the residual stresses, especially the transverse residual stress, were markedly reduced.
Starting Page	1485
Ending Page	1499
Page Count	15
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	78
Issue Number	9-12
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2015-01-10
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Laser welding Hot wire Finite element model Residual stress Phase transformation Industrial and Production Engineering Production/Logistics/Supply Chain Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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