Inhibition Mechanism of Crystal Crack in Copper Thick Plate He-GTA Welding by Adding Deoxidant Element Ti

Yi Nan Li; Zi Long Peng; Shan Bin Zhang

doi:10.4028/www.scientific.net/AMM.595.3

Paper Titles

Preface and Organizatin Committee

Inhibition Mechanism of Crystal Crack in Copper Thick Plate He-GTA Welding by Adding Deoxidant Element Ti
p.3

Eletroreduction of Fe₂O₃ to Fe in Strongly Alkaline Solution
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Preparation of Iodine Doped Titanium Dioxide to Degrade Aqueous Bisphenol A
p.14

The MMT/MCNTs/sPEEK Nanocomposite Membrane for Proton Exchange Membrane Fuel Cells
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Effect of Sintering Temperature Curve in Wick Manufactured for Loop Heat Pipe with Flat Evaporator
p.24

Co-Producing Active Carbons and Sodium Silicate from Pyrolyzed Rice Husk by CO₂ Activation Coupled with NaOH Solution Boiling
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Cracking and Delamination Behavior of Gold Thin Strip Deposited on Polycarbonate Plate under Cyclic and Stepwisely-Increased Trapezoidal Tension
p.36

Study on Unsteady Deformation Law in Roughing Stage of Continuous Hot Strip Rolling
p.45

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 595Inhibition Mechanism of Crystal Crack in Copper...

Inhibition Mechanism of Crystal Crack in Copper Thick Plate He-GTA Welding by Adding Deoxidant Element Ti

Abstract:

He-GTA welding of 10mm thick copper plates by using independent developed welding material - CuTi alloys was investigated. The crystal crack induced by eutectic of Cu and Cu₂O is disappeared completely as the addition of deoxidant element Ti. It can be concluded that the Ti inhibits the formation of Cu₂O and combines with O to generate TiO₂ through the thermal dynamical calculation. As the TiO₂ has the characteristic of high molt point and low density, TiO₂ flows upward to surface of molten pool during welding and forms as weld slag at the weld surface after cooling, then the uniform microstructure without crystal crack is obtained finally. In all GTA welding specimens tested, the failure is located in the heat affected zone and the tensile strength is similar to the base metal.