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contributor authorA. Blake
contributor authorJ. Mazumder
date accessioned2017-05-08T23:20:39Z
date available2017-05-08T23:20:39Z
date copyrightAugust, 1985
date issued1985
identifier issn1087-1357
identifier otherJMSEFK-27714#275_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/100100
description abstractA major problem of autogeneous laser welding Al-5083 is the loss of magnesium by evaporation or plasma formation. This consequently results in welds of low tensile strength and unacceptable porosity. A method has been developed to control plasma formation during welding resulting in satisfactory welds with little or no magnesium loss and porosity. Plasma formation was controlled by manipulation of a main gas jet in a shielding arrangement during welding. Shielding gas pressure needed to suppress the plasma was within an order of magnitude of the theoretically estimated pressure required to sustain a vapor filled “keyhole.” The experiment was carried out using a 10 kW CW-CO2 laser. A two-level factorial experimental design correlated the effects of the independent laser processing variables with as-welded alloy chemistry. Alloy composition was characterized quantitatively using electron probe microanalysis techniques. Observations revealed that magnesium loss could be minimized to as low as 0.9 percent. Radiographic examination and tensile tests further demonstrated that low porosity welds with strengths at least as great as the parent material may be produced by controlling alloy composition via a specially designed inert gas shield.
publisherThe American Society of Mechanical Engineers (ASME)
titleControl of Magnesium Loss During Laser Welding of Al-5083 Using a Plasma Suppression Technique
typeJournal Paper
journal volume107
journal issue3
journal titleJournal of Manufacturing Science and Engineering
identifier doi10.1115/1.3185998
journal fristpage275
journal lastpage280
identifier eissn1528-8935
keywordsPlasmas (Ionized gases)
keywordsLaser welding
keywordsMagnesium
keywordsPorosity
keywordsWelded joints
keywordsAlloys
keywordsWelding
keywordsPressure
keywordsLasers
keywordsProbes
keywordsTensile strength
keywordsElectrons
keywordsVapors
keywordsEvaporation
keywordsChemistry AND Experimental design
treeJournal of Manufacturing Science and Engineering:;1985:;volume( 107 ):;issue: 003
contenttypeFulltext


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