Laser Welding Optimization Procedure Applied to Cobalt Alloys for Removable Partial Dentures

2015 ◽  
Vol 1114 ◽  
pp. 272-277 ◽  
Author(s):  
Alexandru Ghiban ◽  
Mihai Buzatu ◽  
Cristina Maria Bortun ◽  
Brandusa Ghiban ◽  
Nicolae Serban
Keyword(s):  
Laser Welding ◽  
Optimization Procedure ◽  
Structural Features ◽  
Butt Joint ◽  
Welding Parameter ◽  
Optimal Parameters ◽  
Comparison Results ◽  
Dental Applications ◽  
Parameter Values ◽  
Cocrmo Alloys

Optimization of fractured or destroyed removable partial dentures realized from CoCrMo alloys are possible due to modern welding equipments. The aim of study was to offer the processing and welding optimal parameters for some long lasting prosthetic pieces. There are investigated two cobalt based alloys, used for dental applications, types CoCrMo. Laser welding equipments was a Mini Laser XXS (Orotig Italia) and the tested samples were welded in butt joint, without filler material. There are presented in comparison results concerning macro and micro structural analysis made on stereomicroscope OLYMPUS and Reichert microscope. Finally a correlation between different welding parameter values and structural features was made.

Structural Analysis of the Laser Welding Co-Cr-Mo-(Ti) Alloys for Removable Partial Dentures

2015 ◽  
Vol 638 ◽  
pp. 91-97
Author(s):  
Alexandru Ghiban ◽  
Brandusa Ghiban ◽  
Cristina Maria Bortun ◽  
Mihai Buzatu
Keyword(s):  
Structural Analysis ◽  
Laser Welding ◽  
Structural Features ◽  
Butt Joint ◽  
Welding Parameter ◽  
Optimal Parameters ◽  
Ti Alloys ◽  
Comparison Results ◽  
Parameter Values ◽  
Cocrmo Alloys

Optimization of fractured or destroyed removable partial dentures realized from CoCrMo alloys are possible due to modern welding equipments. The aim of study was to offer the processing and welding optimal parameters for some long lasting prosthetic pieces made of a new alloy from the system CoCrMoTi. Laser welding equipments was a Mini Laser XXS (Orotig Italia) and the tested samples were welded in butt joint, without filler material. There are presented in comparison results concerning macro and micro structural analysis made on stereomicroscope and microscope type OLYMPUS. Finally a correlation between different welding parameter values and structural features was made for the new dental cobalt alloy.

Enhanced wetting behavior using femtosecond laser-textured surface in laser welding-brazing of Ti/Al butt joint

2021 ◽  
Vol 142 ◽  
pp. 107212
Author(s):  
Xi Chen ◽  
Zhenglong Lei ◽  
Yanbin Chen ◽  
Meng Jiang ◽  
Nan Jiang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Welding ◽  
Butt Joint ◽  
Textured Surface ◽  
Wetting Behavior

scholarly journals EBSD Investigation of the Microtexture of Weld Metal and Base Metal in Laser Welded Al–Li Alloys

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2357 ◽  
Author(s):  
Li Cui ◽  
Zhibo Peng ◽  
Xiaokun Yuan ◽  
Dingyong He ◽  
Li Chen
Keyword(s):  
Weld Metal ◽  
Base Metal ◽  
Transverse Section ◽  
Grain Morphology ◽  
Structural Features ◽  
Butt Joint ◽  
Horizontal Surface ◽  
Boundary Misorientation ◽  
Texture Intensity ◽  
Highly Correlated

Autogenous laser welding of 5A90 Al–Li alloy sheets in a butt-joint configuration was carried out in this study. The microstructure characteristics of the weld metal and base metal in the horizontal surface and the transverse section of the welded joints were examined quantitatively using electron back scattered diffraction (EBSD) technique. The results show that the weld metal in the horizontal surface and the transverse section exhibits similar grain structural features including the grain orientations, grain shapes, and grain sizes, whereas distinct differences in the texture intensity and misorientation distributions are observed. However, the base metal in the horizontal surface and the transverse section of the joints reveals the obvious different texture characteristics in terms of the grain orientation, grain morphology, predominate texture ingredients, distribution intensities of textures, and grain boundary misorientation distribution, resulting in the diversity of the microhardness in the base metal and the softening of the weld metal. However, the degree of the drop in the hardness of the weld metal is highly correlated to the microtexture developed in the base metal.

Determination of global kinetic parameters by optimization procedure using burning velocity measurements

2018 ◽  
Vol 13 (6) ◽  
pp. 50
Author(s):  
Gleb V. Grenkin ◽  
Alexander Yu. Chebotarev ◽  
Valeri I. Babushok ◽  
Sergey S. Minaev
Keyword(s):  
Kinetic Parameters ◽  
Equivalence Ratio ◽  
Reaction Rate ◽  
Functional Dependence ◽  
Burning Velocity ◽  
Optimization Procedure ◽  
Optimal Parameters ◽  
Velocity Measurements ◽  
Equilibrium Calculations

The optimization procedure was developed to derive the global kinetic parameters using experimental dependence of burning velocity on the equivalence ratio. The simple model of laminar premixed flame propagation with assumed constant parameters was used to demonstrate the features of the suggested procedure. The suggested method allows finding optimal parameters for the defined functional dependence of the reaction rate on the temperature and reactant concentrations. The dependence of combustion adiabatic temperature on equivalence ratio is assumed to be known from the flame equilibrium calculations. The global kinetic parameters of combustion reaction were determined for methane, ethylene and propane mixtures with air on the basis of experimental data on burning velocity as function of the equivalence ratio. The calculated overall kinetic parameters are compared with parameters obtained by other methods within similar global model.

Effect of Butt Joint Gap to High-Strength Automobile Steel of Fiber Laser Welding

2011 ◽  
Vol 38 (6) ◽  
pp. 0603013
Author(s):  
陈根余 Chen Genyu ◽  
陈飞 Chen Fei ◽  
张屹 Zhang Yi ◽  
李时春 Li Shichun ◽  
康斌 Kang Bin
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
High Strength ◽  
Butt Joint ◽  
Fiber Laser Welding ◽  
Joint Gap ◽  
Automobile Steel

The characteristic of interface microstructure for aluminum-steel butt joint by arc assisted laser welding-brazing

2019 ◽  
Vol 6 (9) ◽  
pp. 096533
Author(s):  
Xiaoquan Yu ◽  
Ding Fan ◽  
Jiankang Huang ◽  
Yutao Kang
Keyword(s):  
Laser Welding ◽  
Butt Joint ◽  
Interface Microstructure

Fiber laser welding of thick AISI 304 plate in a horizontal (2G) butt joint configuration

2017 ◽  
Vol 118 ◽  
pp. 53-65 ◽  
Author(s):  
Junhao Sun ◽  
Kai Feng ◽  
Ke Zhang ◽  
Baochao Guo ◽  
En Jiang ◽  
...  
Keyword(s):  
Laser Welding ◽  
Fiber Laser ◽  
Butt Joint ◽  
Fiber Laser Welding ◽  
Aisi 304 ◽  
Joint Configuration

Cobalt Based Alloys for Dental Applications

2013 ◽  
Vol 583 ◽  
pp. 175-178 ◽  
Author(s):  
Brandusa Ghiban ◽  
Cristina Maria Borţun ◽  
Alexandru Ghiban ◽  
Nicolae Ghiban
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mechanical Behaviour ◽  
Structural Features ◽  
Molybdenum Content ◽  
Cobalt Alloys ◽  
Mo Content ◽  
Dental Applications ◽  
Scanning Electron

The present paper put in evidence the mechanical behaviour of some commercial dental cobalt alloys, after own classification. The experimental cobalt alloys were classified in according either with molybdenum content, or with Cr+Mo content. A hierarcy of the alloys was finally made. The fractographic surfaces were investigate both by stereomacroscopy and scanning electron microscopy, putting in evidence the main structural features.

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