Welding: Solidification and microstructure

David, S. A.; Babu, S. S.; Vitek, J.M.

doi:10.1007/s11837-003-0134-7

Cited by 220 publications

(135 citation statements)

References 42 publications

Supporting

Mentioning

128

Contrasting

Unclassified

Order By: Relevance

“…The influence of ferrite content in welds on the solidification and cracking at room temperature has long been documented, but it has not been accurately linked with the cracking sensitivity. A greater focus has been on the solidification behavior of stainless steel welds [74][75][76]. For alloys that display a Cr eq /Ni eq ratio of less than 1.5, austenite is the key phase of solidification.…”

Section: Metallography and Visual Examinationmentioning

confidence: 99%

See 1 more Smart Citation

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Mohammed

Ishak

Ahmad

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:In this study, an attempt on pulsed-fiber laser welding on an austenitic-duplex stainless steel butt joint configuration was investigated. The influence of various welding parameters, such as beam diameter, peak power, pulse repetition rate, and pulse width on the weld beads geometry was studied by checking the width and depth of the welds after each round of welding parameters combination. The weld bead dimensions and microstructural progression of the weld joints were observed microscopically. Finally, the full penetration specimens were subjected to tensile tests, which were coupled with the analysis of the fracture surfaces. From the results, combination of the selected weld parameters resulted in robust weldments with similar features to those of duplex and austenitic weld metals. The weld depth and width were found to increase proportionally to the laser power. Furthermore, the weld bead geometry was found to be positively affected by the pulse width. Microstructural studies revealed the presence of dendritic and fine grain structures within the weld zone at low peak power, while ferritic microstructures were found on the sides of the weld metal near the SS 304 and austenitic-ferritic microstructure beside the duplex 2205 boundary. Regarding the micro-hardness tests, there was an improvement when compared to the hardness of duplex and austenitic stainless steels base metals. Additionally, the tensile strength of the fiber laser welded joints was found to be higher when compared to the tensile strength of the base metals (duplex and austenitic) in all of the joints.

show abstract

Section: Metallography and Visual Examinationmentioning

confidence: 99%

“…Metals 2017, 7, 546 12 of 19 [74][75][76]. For alloys that display a Creq/Nieq ratio of less than 1.5, austenite is the key phase of solidification.…”

Section: Metallography and Visual Examinationmentioning

confidence: 99%

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Mohammed

Ishak

Ahmad

et al. 2017

Metals

View full text Add to dashboard Cite

show abstract

“…The proportionality of g hs with the melting temperature is a consequence of the purely entropic nature of the hard-sphere system. The second step of Laird's argument was to note that the solid density of the hard-sphere system at freezing takes the (temperature independent) value of r ¼ 1:04=s 3 , giving the following relation between Turnbull's scaled interfacial free energy and the melting temperature:ĝ ¼ 0:59k B T M . Laird's explanation for the relationship given in Eq.…”

Section: Comparisons With Experiments and The Turnbull Coefficientmentioning

confidence: 99%

“…Fig. 1 [3,4] is both a dramatic illustration of dendrite pattern formation and a demonstration of the complex morphologies that can arise during commercial joining processes. The scanning electron micrograph depicts the solid-liquid surface formed during the welding of a nickelbased superalloy single crystal.…”

Section: Introductionmentioning

confidence: 99%