Reaction Kinetics of Mg2Si in the Laser Welding Pool of Aluminum Alloys

2013 ◽  
Vol 813 ◽  
pp. 55-63
Author(s):  
Lu Yang ◽  
Qing Hua Wang ◽  
Jie Li ◽  
Yuan Liu ◽  
An Guo Huang
Keyword(s):  
Solid State ◽  
Aluminum Alloys ◽  
Laser Welding ◽  
Reaction Kinetics ◽  
Phase Diagrams ◽  
Weld Pool ◽  
Precipitation Mechanism ◽  
Thermodynamic Condition ◽  
Metallurgical Product ◽  
Kinetics Of

The metallurgy reactions in the weld pool were analyzed with the application of reaction kinetics. Furthermore a formula to quantificationally calculate the amount of Mg2Si was generated. By means of calculating the thermodynamic condition of the reaction and combined with the verification testing, this article indicates that the metallurgical product Mg2Si was created in the liquid weld pool but not separated out from the arborescent crystal during its solid state. This thesis summarizes the precipitation mechanism of Mg2Si and explains the configuration, amount and location where Mg2Si was separated out by analyzing the phase diagrams and constitution diagrams. Relevant data suggests that: the content of Mg2Si is slightly less than Mg.

Reaction Kinetics of the Solid State Polymerization of Poly(bisphenol A carbonate)

2001 ◽  
Vol 34 (7) ◽  
pp. 2060-2064 ◽  
Author(s):  
Chunmei Shi ◽  
Stephen M. Gross ◽  
Joseph M. DeSimone ◽  
Douglas J. Kiserow ◽  
George W. Roberts
Keyword(s):  
Solid State ◽  
Bisphenol A ◽  
Reaction Kinetics ◽  
Solid State Polymerization ◽  
Kinetics Of

White Beam Synchrotron Topographic Studies of the Effects of Localized Stress Fields on the Kinetics of Single Crystal Solid State Reactions.

1988 ◽  
Vol 143 ◽  
Author(s):  
Michael Dudley
Keyword(s):  
Solid State ◽  
Reaction Kinetics ◽  
Local Reaction ◽  
Stress Fields ◽  
Solid State Reactions ◽  
Thermally Induced ◽  
White Beam ◽  
Kinetics Of ◽  
Good Agreement

AbstractWhite Beam Synchrotron Topography has been used to determine the role of localized stress fields in the solid state polymerization of single crystals of the diacetylene PTS. Results indicate that the stress fields due to grown in dislocations can accelerate local reaction kinetics in thermally induced polymerization reactions, although no such effects were previously observable in photolytically or radiolytically induced reactions. Results are analyzed in an analogous fashion to the treatment of the nucleation of solid state phase transformations at dislocations. Good agreement was found between approximate theoretical treatments and experimental observation. The response of the monomer crystal to the inhomogeneous stresses generated as a result of inhomogeneous reaction and the implications regarding local reaction kinetics are discussed in detail.

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