Effects of surface active elements on weld pool fluid flow and weld...

Metallurgical and Materials Transactions;  June 1, 2001 ;     700+ words ......effect) on weld pool fluid flow and weld penetration in spot gas...flow of the weld pool may be created...or shallow weld penetration. In other words...affect the weld pool convection and weld penetration include buoyancy...

Marangoni Convection in Weld Pool in CO2-Ar-Shielded Gas Thermal Arc...

Metallurgical and Materials Transactions;  September 1, 2004 ;     700+ words ......layer forms on the weld pool in the welding...significantly change the weld penetration in GTA welding...element into the weld pool over a critical...increase the weld penetration efficiently for...significantly change the weld penetration and ...

A unified numerical modeling of stationary tungsten-inert-gas welding...

Metallurgical and Materials Transactions;  July 1, 2002 ;     700+ words ......plasma and the weld pool. Calculations...predicted. The weld-penetration geometry is also...plasma to the weld pool plays an important...determination of the weld penetration in the arc-welding...fluid flow in the weld pool are important...workpiece, and ...

Welding: Solidification and microstructure

JOM;  June 1, 2003 ;     700+ words ......formation and non-equilibrium effects during weld pool solidification. The use of model alloy single...resulted in new insight into the role of weld pool geometry and dendrite growth selection processes...of the current progress in understanding weld pool solidification. WELD ...

Modeling marcro-and microstructures of gas-metal-arc welded HSLA-100 steel

Metallurgical and Materials Transactions;  June 1, 1999 ;     700+ words ......dissipation of heat and momentum in the weld pool is significantly aided by turbulence...circulation of the molten metal in the weld pool. The circulation helps to transport heat in the entire weld pool. As the heat source moves away from...

Heat Transfer and Fluid Flow during Gas-Metal-Arc Fillet Welding for...

Metallurgical and Materials Transactions;  March 1, 2007 ;     700+ words ......characterized by the complex joint geometry, a deformable weld pool surface, and the addition of hot metal droplets...configurations on the temperature profiles, velocity fields, weld pool shape, weld pool free surface profile, thermal cycles, and cooling...

Droplet formation, detachment, and impingement on the molten pool in gas...

Metallurgical and Materials Transactions;  August 1, 1999 ;     700+ words ......consumable filler-metal electrode and the weld pool (Figure 1). The GMAW process, due to...show that effect on the molten pool. Weld pool oscillation has been studied, and the...impingement of droplets as they fall into the weld pool. The GMAW molten pool is less studied...

Geometry of laser spot welds from dimensionless numbers

Metallurgical and Materials Transactions;  October 1, 2001 ;     700+ words ......transfer were used for the prediction of weld pool geometry in materials with diverse properties...transported primarily by convection within the weld pool. The resulting welds were shallow and...low in most cases, and low Pe made the weld pool deep and narrow. The cross-sectional...

A Convective Heat-Transfer Model for Partial and Full Penetration Keyhole...

Metallurgical and Materials Transactions;  January 1, 2008 ;     700+ words ......steels, convective heat transport in the weld pool significantly affects temperature fields...D) heat-transfer calculations in the weld pool for both partial and full penetration...mass transfer due to turbulence in the weld pool by calculating spatially variable effective...

Real Time Weld Process Monitoring Is A Valuable Reference To All Those...

M2 Presswire;  April 4, 2008 ;     700+ words ......the analysis of weld penetration and weld pool surface, as well...Electromagnetic monitoring of weld seams in gas metal...visual monitoring of weld seams in gas metal...China Necessity for weld profile measurement. Outline of weld profile. Surface...Automatic detection ...

The art of out-of-position: gas tungsten arc welding presents serious...

Fabricating & Metalworking;  March 1, 2007 ;     700+ words ......and more expensive but gives a stable weld pool that defies gravity in multiple positions...uses a filler metal inserted into the weld pool, but select materials can even be welded...than air and will rise to protect your weld pool, Sammons says. READING THE POOL Experienced...

Prototype of analysis of gravity-modulated welding by inverting weld cross...

JOM;  June 1, 2003 ;     700+ words ......space. This article examines changes in weld-pool characteristics due to changes in gravitational...microstructure, and properties of the solidified weld pool. Unfortunately, the few microgravity...mass transport and convection in the weld pool. Gravity accounted for ...

Prigogine's theorem and the stability of fusion welding of butt joints...

Welding International;  August 1, 2006 ;     700+ words ......preventing complete penetration of the weld pool: ... where σ^sub m^ is the coefficient...condition of static equilibrium of the weld pool with continuous penetration is essential...the input diameter of the crater of the weld pool D^sub cr^ and the width of the welded...

Waveform Control Improves Productivity.(using artificial intelligence)

Welding Design & Fabrication;  May 1, 2001 ;     700+ words ......between a continuously fed wire and the weld pool. Wire is melted to provide additional...are transferred across the arc to the weld pool in a continuous stream. In pulsed spray...explosive separation of the wire from the weld pool causes weld spatter and causes some smoke...

What's New.(Lincoln Electric Co)(Brief article)

Crain's Cleveland Business;  August 28, 2006 ;     164 words ......and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld pool. If filler wire is used, it is added to the weld pool separately. Send new product information to ssuttell@crain.com.