The development of a solidification cracking test for carbon-manganese steel laser welds
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The development of a solidification cracking test for carbon-manganese steel laser welds by G. I. Rees

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Published by TWI in Cambridge .
Written in English

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Statementby G. I. Rees.
ID Numbers
Open LibraryOL22825040M

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  Laser beam welding (LBW) transverse-Varestraint tests were performed to quantitatively evaluate the solidification cracking susceptibility of laser welds of type FR stainless steel with two kinds of filler metal (FR-A and FR-B). This found that as the welding speed increased from to mm/s, the increase in the solidification brittle temperature range (BTR) was greater in the Cited by: In DP steel, solidification cracking was not observed in any of the cases. Fig. 3(a-b) show high-speed camera images taken during welding of TRIP steel for the cases A and E [23].A solidification Author: Gautam Agarwal. For quantitative evaluation of solidification cracking susceptibility in two kinds of type FR stainless steel (FR-A and FR-B) laser welds, laser beam welding (LBW) transverse-Varestraint.   1. Introduction. Solidification cracking is a highly complex phenomenon in welding [1, 2], which is similar to hot tearing in casting [3, 4].Solidification cracks are distinguished from other forms of cracks such as cold cracks and ductility dip cracks [5, 6], in that these occur above the solidus fication cracks initiate in the mushy zone as a result of thermal stresses.

  The mechanism of solidification cracking in a laser-remelted bead of a plasma-sprayed CoCrFeMnNi high-entropy alloy coating was revealed. The oriented dendrite growth and phase distribution of the remelted bead were characterized by electron backscatter diffraction, which indicated that the center of this local site consisted of parallel columnar grains. The cantilever type cracking test in laser welding revealed that the predicted results of occurrence of solidification cracks were consistent with experimental ones. Keywords:: type stainless steel, laser welding, solidification cracking, prediction, solidification brittle range, supercooling, solidification segregation, thermal.   Laser welded 6XXX series Al alloys exhibit a fine cellular dendrite structure at the center of the fusion zone. Solidification cracking has been observed during the laser welding of the 6XXX series aluminum alloy, which is sensitive to hot cracking during solidification. Kang et al. 27 M. Therefore the choice of filler material is important to suppress cracking so a type filler is used to weld type stainless steel. Best practice in avoiding solidification cracking. Apart from the choice of material and filler, the principal techniques for minimising the risk of welding solidification cracking are.

cracking susceptibility of austenitic stain­ less steel welds made over a wide range of solidification conditions. Introduction For over 50 years, the relationship be­ tween weld metal ferrite content and sus­ ceptibility to weld solidification cracking in austenitic stainless steels has been well recognized (Refs. ). The general ap­. Diffractive optical elements for manipulation of CO2 laser radiation – a feasibility study; A review of joint tracking systems for laser welding; Control of porosity in CO2 laser welds in C/Mn steel; The development of a solidification cracking test for carbon-manganese steel laser welds. As for the weld solidification structure, as the Mg content increased in the weld metal, more equiaxed grains developed. Hence, softening of weld metal and solidification cracking were decreased in the weld metal containing higher Mg. Solidification cracking of Al-Mg alloy laser welds showed the highest susceptibility at to wt.%. Susceptibility to weld solidification cracking in transformation-induced plasticity steel sheets was studied using a modified standard hot cracking test used in the automotive industry. To vary the amount of self-restraint, bead-on-plate laser welding was carried out on a single-sided clamped specimen at increasing distances from the free edge.