Metallurgical investigations of pulsed Nd:YAG laser welding of AISI 321 and AISI 630 stainless steels

Mousavi, S.A.A. Akbari; Sufizadeh, A.R.

doi:10.1016/j.matdes.2008.11.026

Cited by 66 publications

(17 citation statements)

References 3 publications

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“…5b) indicates that because of the high cooling rates the austenite phase was replaced by a ferrite-austenite microstructure characterised by low hardness. Similar results were obtained by Mousavi [14]. On the carbon steel side, the hardness increasing in the HAZ is produced by the transformation of the ferrite-pearlite into martensite structure due to the high thermal gradient.…”

Section: Hardness and Tensile Behavioursupporting

confidence: 86%

“…A more challenging investigation, welding of AISI 420 stainless steel to kovar alloy, through minimizing hot crack formation in the weld zone is reported by Baghjari [13]. Good results were obtained by Mousavi for laser welding of AISI 321 and AISI 630 stainless steels in a circular but weld geometry [14]. By using controlled experimental conditions regarding the laser power, Anawa obtained good results in terms of mechanical proprieties of ferritic/austenitic (F/A) joints [15].…”

Section: Introductionmentioning

confidence: 99%

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Dissimilar Laser Welding of AISI 321 and AISI 1010

et al. 2018

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This paper presents the dissimilar laser welding of AISI 321 stainless steel and AISI 1010 carbon steel thin sheets in butt joint geometry using a 1 kW diode laser. Influence of the welding speed on the geometry and microstructure of the joints is discussed. Structural characterisation of the welds is realised through optical, electron microscopy and EDS analysis, observing distinct mixed and unmixed areas in the weld bead because of the high cooling rate. The weld bead presents an austenitic-martensitic-ferrite structure, characterized by austenitic twin grains with ferrite particles precipitated on grain boundaries, and islands comprising a ferritemartensite structure. Chromium and nickel migration in the weld bead area was observed. Good tensile behaviour of the dissimilar joints was obtained, as all the specimen failure occurs far-off the weld zone.

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Section: Hardness and Tensile Behavioursupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Dissimilar Laser Welding of AISI 321 and AISI 1010

et al. 2018

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“…Kovar (Fe-29Ni-17Co) alloys possess the advantages of low-temperature constant expansion, and thermal expansion properties and a good thermal matching performance similar to Si, Ge, and glass, thus obtaining wide application in the electronics industry [3][4][5]. Joining stainless steel and Kovar alloys has been widely done in aerospace, nuclear, and electronic industries for technical and economic reasons [6][7][8]. However, due to the differences in thermo-mechanical and metallurgical properties, many obstacles to achieving good dissimilar joints have been confronted, such as precipitates, intermetallics, and distortions of the weld interface, which is detrimental to joint properties [1,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Joining stainless steel and Kovar alloys has been widely done in aerospace, nuclear, and electronic industries for technical and economic reasons [6][7][8]. However, due to the differences in thermo-mechanical and metallurgical properties, many obstacles to achieving good dissimilar joints have been confronted, such as precipitates, intermetallics, and distortions of the weld interface, which is detrimental to joint properties [1,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The Interfacial Microstructure and Mechanical Properties of Diffusion-Bonded Joints of 316L Stainless Steel and the 4J29 Kovar Alloy Using Nickel as an Interlayer

Song

Jiang

Shao

et al. 2016

Metals

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316L stainless steel ) and a Kovar (Fe-29Ni-17Co or 4J29) alloy were diffusion-bonded via vacuum hot-pressing in a temperature range of 850-950 • C with an interval of 50 • C for 120 min and at 900 • C for 180 and 240 min, under a pressure of 34.66 MPa. Interfacial microstructures of diffusion-bonded joints were characterized by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS). The inter-diffusion of the elements across the diffusion interface was revealed via electron probe microanalysis (EPMA). The mechanical properties of the joints were investigated via micro Vickers hardness and tensile strength. The results show that an Ni interlayer can serve as an effective diffusion barrier for the bonding of 316L stainless steel and the 4J29 Kovar alloy. The composition of the joints was 316L/Ni s.s (Fe-Cr-Ni)/remnant Ni/Ni s.s (Fe-Co-Ni)/4J29. The highest tensile strength of 504.91 MPa with an elongation of 38.75% was obtained at 900 • C for 240 min. After the width of nickel solid solution (Fe-Co-Ni) sufficiently increased, failure located at the 4J29 side and the fracture surface indicated a ductile nature.

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“…Mousaviand S. [7] investigated the compatibility of AISI 321 and AISI 630 stainless steels, Naffakh H. [8] characterized the AISI 310 -Inconel 657 dissimilar welds and M.M.A. Khan et all [9] tried to define the optimal parameter window for the AISI 430F and AISI 440C dissimilar laser welding.…”

Section: Introductionmentioning

confidence: 99%

Chemical and Mechanical Characterization of AISI 304 and AISI 1010 Laser Welding

Pascu

Stanciu

Voiculescu

et al. 2015

Materials and Manufacturing Processes

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This paper addresses to the dissimilar laser welding of AISI 304 and AISI 1010 steel thin sheets. Cracks-free dissimilar edge fillet welds have been conducted using a Nd: YAG laser. Geometrical, micro structural, chemical and mechanical proprieties of the welds were investigated using electron microscopy, EDS and tensile test assisted by digital image correlating. The proper results were achieved at an energy density of 88 J/mm 2 using a 0.4 mm laser spot diameter. An austenite-ferrite structure characterizes the weld bead and the precipitation of the chromium carbide at the grain limits was observed in the heat affected zone. Good tensile behaviour was obtained; dissimilar joint was fractured on the carbon steel side at 482 MPa and 0.35 stain.

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Metallurgical investigations of pulsed Nd:YAG laser welding of AISI 321 and AISI 630 stainless steels

Cited by 66 publications

References 3 publications

Dissimilar Laser Welding of AISI 321 and AISI 1010

Dissimilar Laser Welding of AISI 321 and AISI 1010

The Interfacial Microstructure and Mechanical Properties of Diffusion-Bonded Joints of 316L Stainless Steel and the 4J29 Kovar Alloy Using Nickel as an Interlayer

Chemical and Mechanical Characterization of AISI 304 and AISI 1010 Laser Welding

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