Nickel-based alloy/austenitic stainless steel dissimilar weld properties prediction on asymmetric distribution of laser energy

Zhou, Siyu; Ma, Guangyi; Chai, Dongsheng; Niu, Fangyong; Dong, Jinfei; Wu, Dongjiang; Zou, Helin

doi:10.1016/j.optlastec.2016.01.017

Cited by 24 publications

(5 citation statements)

References 20 publications

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“…Nevertheless, the characterization of the affected dimensions for a given material requires a previous experimental campaign to relate the affected area with the pulse parameters. This preliminary step, not being necessarily expensive or time consuming, could be substituted by means of numerical simulation studying the phenomena associated to the heat conduction and the plasma dynamics [12,25], involving less experimental work, but having to deal with high computational times and complexity.…”

Section: Discussionmentioning

confidence: 99%

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Cordovilla

Tur

Beltrán

et al. 2018

Metals

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Laser welding of dissimilar stainless steels is of interest when mechanical, corrosion, or esthetical requirements impose the use of a high-performance stainless steels, while production-cost requirements prevent using expensive materials in all the parts of a given device. The compromise may lead to the use of the most expensive material in critical areas and the cheapest one in the remaining. Their union can be materialized by laser-pulsed welding. It has intrinsic difficulties derived from the different physical and chemical properties of the steels, and from the need of preserving the protective passive layer. The present work achieves a welded joint with minimum thermal impact by means of laser pulses, capable of preserving the corrosion resistance of the involved stainless steels. The influence of the parameters to define static and dynamic pulses on the material and on the welding regime, keyhole, or heat conduction, is studied. It is used to calculate the overlapping factor of the pulses on the basis of the real dimensions of the melted area. A continuous joint has been built with dynamic pulses. The corrosion resistance of it has been checked showing a similar behavior to the non-heated material. The microstructure of the optimized joint is associated with a reduced HAZ while its mechanical behavior is suitable for its real application.

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Section: Discussionmentioning

confidence: 99%

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Cordovilla

Tur

Beltrán

et al. 2018

Metals

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“…In the experimental procedure, tensile-shear testing is conducted at room temperature using an electronic universal tensile testing machine. The overlay welding method is employed, and corresponding gaskets are incorporated during the test to ensure coaxial tension [22]. Figure 10 illustrates the maximum stress of the joints under varying heat inputs.…”

Section: Performance Evaluationmentioning

confidence: 99%

Effect of Heat Input on Microstructure and Properties of Laser-Welded 316L/In601 Dissimilar Overlap Joints in High-Temperature Thermocouple

Wang,

Zhao,

Luo

et al. 2023

Materials

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Heat input, a crucial factor in the optimization of high-temperature thermocouple laser welding, has a significant impact on the appearance and mechanical properties of dissimilar welded joints involving stainless-steel- and nickel-based alloys. This study focuses on laser overlay welding of austenitic stainless steels and nickel-based alloys. The findings indicate that an increase in heat input has a more pronounced effect on the penetration depth and dilution rate. Under high heat input, the weld has cracks, spatter, and other defects. Additionally, considerable amounts of chromium (Cr) and nickel (Ni) elements are observed outside the grain near the crack, and their presence increases with higher heat input levels. Phase analysis reveals the presence of numerous Cr2Fe14C and Fe3Ni2 phases within the weld. The heat input increases to the range of 30–35 J/mm, and the weld changes from shear fracture to tensile fracture. In the center of the molten pool, the Vickers hardness is greater than that of the base metal, while in the fusion zone, the Vickers hardness is lower than that of the base metal. The overall hardness is in a downward trend with the increase of heat input, and the minimum hardness is only 159 HV0.3 at 40 J/mm. The heat input falls within the range of 28–30 J/mm, and the temperature shock resistance is at its peak.

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“…The susceptibility of the solidification crack in the weld is related to the dilution rate of dissimilar metals. For welding between Ni-base superalloys and austenitic stainless steels, in general, the range of solidification temperatures for the weld metal increases with the dilution rate of austenitic stainless steels, which, in turn, increases the susceptibility of heterogeneous metal welds to solidification cracking [6][7][8]. Impurity elements such as S and P tend to form low-melting-point liquid films at grain boundaries, which can also increase the susceptibility to solidification cracking in the weld [9].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of IN690 Ni-Based Alloy/316LN Stainless-Steel Dissimilar Ring Joint Welded by Inertia Friction Welding

Tong,

Zhang,

et al. 2024

Materials

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Inertia friction welding (IFW) was used to join large-diameter hollow bars made of Inconel 690 and 316LN successfully. The interfacial characteristics, microstructure, mechanical properties and fracture mechanism of welded joints under different process parameters were investigated. The results indicated that a joining mechanism with mechanical interlocking and metallurgical bonding was found in IFW joints. There was a significant mechanical mixing zone at the welding interface. The elemental diffusion layer was found in the “wrinkles” of the mechanical mixing zone. A tiny quantity of C elements accumulated on the friction and secondary friction surfaces. The tensile strength and impact toughness of the joints increased with the total welding energy input. Increasing the friction pressure could make the grain in all parts of the joint uniformly refined, thus enhancing the mechanical properties of welded joints. The maximum tensile strength and impact toughness of the welded joint were 639 MPa and 146 J/cm2, reaching 94% and 68% of that for Inconel 690, respectively, when the flywheel was initially set at 760 rpm, 200 MPa for friction pressure, and 388 kg/m2 for rotary inertia. Due to the Kirkendall effect in the welded joint, superior metallurgical bonding was at the welding interface close to the Inconel 690 side compared to the 316LN side.

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Nickel-based alloy/austenitic stainless steel dissimilar weld properties prediction on asymmetric distribution of laser energy

Cited by 24 publications

References 20 publications

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Minimization of the Thermal Impact in the Laser Welding of Dissimilar Stainless Steels

Effect of Heat Input on Microstructure and Properties of Laser-Welded 316L/In601 Dissimilar Overlap Joints in High-Temperature Thermocouple

Microstructure and Mechanical Properties of IN690 Ni-Based Alloy/316LN Stainless-Steel Dissimilar Ring Joint Welded by Inertia Friction Welding

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