Plastic anisotropy and deformation-induced phase transformation of additive manufactured stainless steel

Chae, Hobyung; Huang, E-Wen; Jain, Jayant; Wang, Huamiao; Woo, Wanchuck; Chen, Shi Wei; Harjo, Stefanus; Kawasaki, Takuro; Lee, Soo Yeol

doi:10.1016/j.msea.2019.138065

Cited by 47 publications

(16 citation statements)

References 57 publications

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“…Herein, we demonstrate an increase in strength (by 30 MPa for yield tensile strength (YTS) and by 70 MPa for UTS) and decrease in ductility (by 33 %) for samples printed in the horizontal direction ( Fig. 6) which correlate with previous results [7,8,20]. Fig.…”

Section: Building Directionsupporting

confidence: 89%

“…The thermal gradient leads to the formation of an anisotropic structure. Previous works [7,8,10,20] demonstrate the difference in mechanical properties for items printed in different directions. Herein, we demonstrate an increase in strength (by 30 MPa for yield tensile strength (YTS) and by 70 MPa for UTS) and decrease in ductility (by 33 %) for samples printed in the horizontal direction ( Fig.…”

Section: Building Directionmentioning

confidence: 98%

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Structure control of 316L stainless steel through an additive manufacturing

et al. 2019

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The 3D printing process is a recent technique, which allows one to produce parts of complex geometry. The influence of printing parameters on the mechanical and structural properties of many materials has been extensively studied. However, despite the considerable amount of research, the task of comparing the results of different scientific groups is complicated. Each research group performs the investigation with different printing conditions. A lot of works contain not full information about the printing process parameters which were applied. This paper presents the results on the mechanical and structural properties of 316L stainless steel according to variable printing parameters, such as laser density energy, scan strategy, and build direction at other fixed conditions. The results reveal a parabolic dependency between the mechanical properties and the laser density energy. The laser density energy of 161 J/mm 3 leads to the best mechanical characteristics (yield strength of 530 MPa, ultimate strength of 580 MPa, and ductility of 63.2%). Scan strategy does not influence the mechanical properties of the samples printed in the vertical direction. At the same time, the strong scan strategy effect is observed for the samples printed in horizontal direction. The difference in the ultimate strength between the vertically and horizontally printed samples reaches up to 70 MPa.

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Section: Building Directionsupporting

confidence: 89%

Section: Building Directionmentioning

confidence: 98%

Structure control of 316L stainless steel through an additive manufacturing

et al. 2019

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“…The additive manufacturing brings high degrees of geometrical freedom to the production of alloy components [91]. The advantages of the additive manufacturing, such as customized geometry [92], fast cooling for intermediate phase effects [93], mixing of metallics-ceramics powders [94,95], and anisotropic effects [96], are well known. For additive manufacturing, high-entropy alloys also show great potentials [97][98][99][100].…”

Section: Discussion and Future Perspectivesmentioning

confidence: 99%

Mechanical and Magnetic Properties of the High-Entropy Alloys for Combinatorial Approaches

et al. 2020

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This review summarizes the state of high-entropy alloys and their combinatorial approaches, mainly considering their magnetic applications. Several earlier studies on high-entropy alloy properties, such as magnetic, wear, and corrosion behavior; different forms, such as thin films, nanowires, thermal spray coatings; specific treatments, such as plasma spraying and inclusion effects; and unique applications, such as welding, are summarized. High-entropy alloy systems that were reported for both their mechanical and magnetic properties are compared through the combination of their Young’s modulus, yield strength, remanent induction, and coercive force. Several potential applications requiring both mechanical and magnetic properties are reported.

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“…However, they can be also a useful indicator of the process conditions. Solidification microstructures often have morphological and crystallographic textures along temperature gradient, which depends on the process conditions [8,10,16,39,41]. In the solidification of cubic metals, the columnar shape of grains whose principal axes are <100> directions along the maximum temperature gradient is often reported [8,10,39,41,42].…”

Section: Austenitic Textures and Thermal Cycles In The Parts Of The Amentioning

confidence: 99%

“…For metallic materials, it is generally implemented by selective melting of powder with laser or electron beams [3][4][5][6][7][8][9][10]. Many kinds of metallic powder have been tested for application in mechanical or functional parts [3,[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] and a few new alloys dedicated to AM are being developed [14,21,22].…”

Section: Introductionmentioning

confidence: 99%

Micro-Texture Analyses of a Cold-Work Tool Steel for Additive Manufacturing

et al. 2020

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Small objects of an alloy tool steel were built by selective laser melting at different scan speeds, and their microstructures were analyzed using electron backscatter diffraction (EBSD). To present an explicit correlation with the local thermal cycles in the objects, prior austenite grains were reconstructed using the EBSD mapping data. Extensive growth of austenitic grains after solidification could be detected by the disagreement between the networks of carbides and austenite grain boundaries. A rapid laser scan at 2000 mm/s led to less growth, but retained a larger amount of austenite than a slow one at 50 mm/s. The rapid scan also exhibited definite evolution of Goss-type textures in austenite, which could be attributed to the growth of austenitic grains under a steep temperature gradient. The local variations in the microstructures and the textures enabled us to speculate the locally different thermal cycles determined by the different process conditions, that is, scan speeds.

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Plastic anisotropy and deformation-induced phase transformation of additive manufactured stainless steel

Cited by 47 publications

References 57 publications

Structure control of 316L stainless steel through an additive manufacturing

Structure control of 316L stainless steel through an additive manufacturing

Mechanical and Magnetic Properties of the High-Entropy Alloys for Combinatorial Approaches

Micro-Texture Analyses of a Cold-Work Tool Steel for Additive Manufacturing

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