Fusion zone characterization of resistance spot welded maraging steels via selective laser melting

Abstract Application of maraging steels via selective laser melting process in the automotive industry was unavoidably involved in the resistance spot welding with conventional steels. Due to the rapid cooling rate of welding process, selective laser melted maraging steels with unique chemical components and stack microstructure could induced the different microstructural evolution, resulting in the complicated fracture behavior in the spot welds. This paper developed a FEA model to predict the fracture mode of spot welds of DP600 to maraging steel and the effect of test conditions and printing orientations were studied. A method was proposed to calculate the material properties of fusion zone by introducing the combined effect of melting DP600 and maraging steels via selective laser melting, resulting in the accurate prediction of fracture mode and strength of spot welds. An interlayer with lower strength was found around the fusion zone and the fracture path propagated in the region, resulting in the partial interfacial failure of spot welds. Meanwhile, the printing orientation had no significant effect on the fracture mode and strength of spot welds, but the different material properties of maraging steels could affect the fracture displacement of spot welds. These findings could pave a way to guide the application of maraging steels via selective laser melting process in multiple industries, especially in the automotive industry.

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Investigation of crystal growth mechanism during selective laser melting and mechanical property characterization of 316L stainless steel parts

Materials & Design ◽

10.1016/j.matdes.2016.03.111 ◽

2016 ◽

Vol 100 ◽

pp. 291-299 ◽

Cited By ~ 225

Author(s):

Di Wang ◽

Changhui Song ◽

Yongqiang Yang ◽

Yuchao Bai

Keyword(s):

Mechanical Property ◽

Stainless Steel ◽

Crystal Growth ◽

Selective Laser Melting ◽

Growth Mechanism ◽

316L Stainless Steel ◽

Laser Melting ◽

Crystal Growth Mechanism ◽

Property Characterization

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Characterization of laser spatter and condensate generated during the selective laser melting of 304L stainless steel powder

Additive Manufacturing ◽

10.1016/j.addma.2019.100904 ◽

2020 ◽

Vol 31 ◽

pp. 100904 ◽

Cited By ~ 1

Author(s):

Austin T. Sutton ◽

Caitlin S. Kriewall ◽

Ming C. Leu ◽

Joseph W. Newkirk ◽

Ben Brown

Keyword(s):

Stainless Steel ◽

Selective Laser Melting ◽

Steel Powder ◽

Stainless Steel Powder ◽

304L Stainless Steel ◽

Laser Melting

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Selective laser melting of pure iron: Multiscale characterization of hierarchical microstructure

Materials Characterization ◽

10.1016/j.matchar.2019.05.012 ◽

2019 ◽

Vol 154 ◽

pp. 222-232 ◽

Cited By ~ 3

Author(s):

P. Lejček ◽

M. Roudnická ◽

J. Čapek ◽

D. Dvorský ◽

J. Drahokoupil ◽

...

Keyword(s):

Selective Laser Melting ◽

Pure Iron ◽

Laser Melting ◽

Hierarchical Microstructure

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Aluminum–Alumina Composites: Part Ⅰ: Obtaining and Characterization of Powders

Materials ◽

10.3390/ma12193180 ◽

2019 ◽

Vol 12 (19) ◽

pp. 3180 ◽

Cited By ~ 1

Author(s):

Gromov ◽

Nalivaiko ◽

Ambaryan ◽

Vlaskin ◽

Buryakovskaya ◽

...

Keyword(s):

Selective Laser Melting ◽

Particle Morphology ◽

Laser Diffraction ◽

Alumina Content ◽

Laser Melting ◽

Aluminum Powders ◽

Alumina Composites ◽

Oxidation Modes ◽

Volumetric Methods

The process of advanced aluminum-alumina powders production for selective laser melting was studied. The economically effective method of obtaining aluminum–alumina powdery composites for further selective laser melting was comprehensively studied. The aluminum powders with 10–20 wt. % alumina content were obtained by oxidation of aluminum in water. Aluminum oxidation was carried out at ≤200 °C. The oxidized powders were further dried at 120 °C and calcined at 600 °C. Four oxidation modes with different process temperatures (120–200 °C) and pressures (0.15–1.80 MPa) were investigated. Parameters of aluminum powders oxidation to obtain composites with 10.0, 14.5, 17.4, and 20.0 wt. % alumina have been determined. The alumina content, particle morphology, and particle size distribution for the obtained aluminum–alumina powdery composites were studied by XRD, SEM, laser diffraction, and volumetric methods. According to the obtained characteristics of aluminum–alumina powdery composites, they are suitable for the SLM process.

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