Laser Welding of Titanium Grade 2 and Aluminium AA 3105-O Using a New AlScZr Filler Metal

2022 ◽  
Author(s):  
Abeer A. Shehab ◽  
S. K. Sadrnezhaad ◽  
Muhaed Alali ◽  
Masood Fakouri Hasanabadi ◽  
M. J. Torkamany ◽  
...  
Keyword(s):  
Laser Welding ◽  
Filler Metal ◽  
Titanium Grade

scholarly journals Wire-Feeding Laser Welding of Copper/Stainless Steel Using Different Filler Metals

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2122
Author(s):  
Xiaoyan Gu ◽  
Ziwei Cui ◽  
Xiaopeng Gu ◽  
Jiaxu Shao
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Laser Welding ◽  
Large Deformation ◽  
Grain Refinement ◽  
Filler Metal ◽  
Weld Interface ◽  
Grain Sizes ◽  
Filled Joint ◽  
Wire Feeding

Ni-based filler metal and Ni-Cu-based filler metal were used to obtain copper/stainless steel (Cu/SS) joints through wire-feeding laser welding. Along the SS/weld interface, there exist different grain sizes (from coarse columnar grains to fine equiaxed grains). The heat affected zone (HAZ) on the copper side consisted of two areas with different grain sizes and the size of the grain in the Cu-HAZ of the Ni-Cu-based filled joint was much smaller than that of the Ni-based filled joint. Our results showed that grain refinement at the copper/weld (Cu/weld) interface of the Ni-Cu-based filled joint was observed through high-resolution electron backscattered diffraction (EBSD). There was a hardness elevation at the Cu/weld interface of the Ni-Cu-based filled joint due to the grain refinement on the weld of the copper side. The maximum tensile strength of the Ni-Cu-based filled joint was obtained and reached 91.2% of the tensile strength of the copper base metal (Cu-BM). Joints in this study were observed to fracture in a ductile mode. Furthermore, the Ni-Cu-based filled joint exhibited a higher plastic deformation, which was primarily caused by the large deformation of the weld zone and the large deformation of the Cu-BM due to the high plasticity of the weld, which alleviated the stress concentration, as indicated by 2D-digital image correlation (DIC) test results.

scholarly journals Advances in Gas Turbine Blade Repair by Laser Welding

1997 ◽  
Author(s):  
Ettore Gandini ◽  
Franco Agnesone ◽  
Federica Taricco ◽  
Leonardo Arrighi
Keyword(s):  
Laser Welding ◽  
Gas Turbine ◽  
Filler Metal ◽  
Stress Rupture ◽  
Microstructural Characterization ◽  
Operating Life ◽  
Blade Alloy ◽  
Machining Operations ◽  
Industrial Gas Turbine ◽  
Blade Repair

Industrial gas turbine components are subject, in the course of their operating life, to various kinds of damages, requiring repair processes during periodical overhauling operations. Blades, in particular, suffer from creep, corrosion, wear phenomena. The majority of blade damage is currently repaired by means of manual TIG welding, with a filler metal which is often different from the blade alloy. This leads to an inferior metallurgical and mechanical condition of the repaired area as compared to the base metal. Besides, the nickel superalloys of the blades are often subject to cracking during welding operations. A process of laser welding for the repair of the airfoil tip has been introduced and optimized, to improve the characteristics of the repaired component. Powder of the same alloy of the part is used as filler metal, and the process is carried out using a Nd:YAG laser, equipped with a 6–axis CNC motion control. The original blade geometry is rebuilt by multi–layer cladding, then the blade is submitted to machining operations, NDT testing and heat treatment. The optimizing activity has been performed with the aid of microstructural characterization, chemical composition checking (by EDX microanalysis), hardness and stress rupture testing of the welded specimens.

314 Effect of Filler Metal on Laser Welding of AZ31/A5052 Dissimilar Metals

2005 ◽  
Vol 2005.54 (0) ◽  
pp. 79-80
Author(s):  
Yukio MIYASHITA ◽  
Rattana Borrisotthekul ◽  
Yoshiharu MUTOH
Keyword(s):  
Laser Welding ◽  
Filler Metal ◽  
Dissimilar Metals

scholarly journals Compound connection mechanism of Al2O3 ceramic and TC4 Ti alloy with different joining modes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yan Zhang ◽  
YanKun Chen ◽  
JianPing Zhou ◽  
DaQian Sun ◽  
HongMei Li
Keyword(s):  
Tensile Strength ◽  
Heat Conduction ◽  
Laser Beam ◽  
Laser Welding ◽  
Filler Metal ◽  
Dissimilar Material ◽  
Ti Alloy ◽  
Al2o3 Ceramic ◽  
Maximum Tensile Strength ◽  
Fusion Weld

AbstractIn this paper, laser welding-brazing of TC4 Titanium (Ti) alloy and Al2O3 ceramic dissimilar material was carried. The results showed that the Ti alloy and Al2O3 were joined by melting filler metal when the laser was concentrated in the Ti alloy side of the joint. The joint with one fusion weld and one brazed weld separated by remaining unmelted Ti alloy. Laser beam offset the Ti alloy 1.5 mm, Ti alloy would not be completely melted in joint. Through heat conduction, the filler metal melted occurred at the Ti-ceramic interface. A brazed weld was formed at the Ti-ceramic interface with the main microstructure of β-CuZn + Ti2Zn3, β-CuZn and Al2Cu + β-CuZn. The joint fractured at the brazed weld with the maximum tensile strength of 169 MPa.

scholarly journals Mechanical Properties of Joints Made in Steel S1300QL Using Various Welding Methods

2020 ◽  
pp. 9-22
Author(s):  
Mirosław Łomozik
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Beam ◽  
Laser Welding ◽  
Yield Point ◽  
Electron Beam Welding ◽  
Filler Metal ◽  
Welding Method ◽  
Minimum Yield ◽  
Made In

The article presents applications of high-strength quenched steels in various industrial sectors and the chronological development of various grades of the aforesaid steels. The research-related tests involved flat butt joints made in 7 mm thick steel grade S1300QL, welded using the following methods: TIG, A-TIG, MAG involving the use of a hard flux-cored surfacing wire, MAG method involving the use of a solid wire, T.I.M.E. method involving the use of a solid wire, laser welding method without the use of the filler metal, hybrid (HLAW) method involving the use of a metallic flux-cored wire, electron beam welding without using the filler metal. The research also involved the performance of the mechanical properties of the welded joints made in quenched steel S1300QL using various welding methods. The joints made using the laser welding method, hybrid welding method and the electron beam welding method were characterised by tensile strength higher than the minimum yield point of steel S1300QL, amounting to 1300 MPa. In turn, the tensile strength of the joints made in steel S1300QL using arc welding methods was lower than the minimum yield point of the steel. All of the test joints were subjected to non-destructive digital radiographic tests. The tests concerning the mechanical properties of the joints with respect to various welding methods were subjected to comparative analysis. The research work finished with the formulation of concluding remarks concerning the mechanical properties of the joints.

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