Residual stresses in LENS-deposited AISI 410 stainless steel plates

Wang, Liang; Felicelli, Sergio D.; Pratt, P.

doi:10.1016/j.msea.2008.05.044

Cited by 118 publications

(58 citation statements)

References 17 publications

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“…Therefore, understanding their contribution is critical in process optimization. However, there are few studies aimed at such [54] and less, which evaluate laser powers greater than 200 W. A qualitative assessment can be made using the DICmeasured deflection of an exposed surface within these parts ( Figure 11). A decrease in residual stress-induced deflection is observed in parts built at increasing energy per unit length, with the least amount of deflection occurring in parts built at a laser power and speed of 100 W and 400 mm/s, respectively.…”

Section: E Laser Powermentioning

confidence: 99%

An Experimental Investigation into Additive Manufacturing-Induced Residual Stresses in 316L Stainless Steel

Brown

Kumar

et al. 2014

Metall Mater Trans A

552

218

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Additive manufacturing (AM) technology provides unique opportunities for producing net-shape geometries at the macroscale through microscale processing. This level of control presents inherent trade-offs necessitating the establishment of quality controls aimed at minimizing undesirable properties, such as porosity and residual stresses. Here, we perform a parametric study into the effects of laser scanning pattern, power, speed, and build direction in powder bed fusion AM on residual stress. In an effort to better understand the factors influencing macroscale residual stresses, a destructive surface residual stress measurement technique (digital image correlation in conjunction with build plate removal and sectioning) has been coupled with a nondestructive volumetric evaluation method (i.e., neutron diffraction). Good agreement between the two measurement techniques is observed. Furthermore, a reduction in residual stress is obtained by decreasing scan island size, increasing island to wall rotation to 45 deg, and increasing applied energy per unit length (laser power/speed). Neutron diffraction measurements reveal that, while in-plane residual stresses are affected by scan island rotation, axial residual stresses are unchanged. We attribute this in-plane behavior to misalignment between the greatest thermal stresses (scan direction) and largest part dimension.

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Section: E Laser Powermentioning

confidence: 99%

An Experimental Investigation into Additive Manufacturing-Induced Residual Stresses in 316L Stainless Steel

Brown

Kumar

et al. 2014

Metall Mater Trans A

552

218

View full text Add to dashboard Cite

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“…Further, they found little sensitivity of the stresses to the track raster pattern used [20]. Finite element modelling work also predicts tensile stresses near surface and compressive stresses perpendicular to the substrate [21,22]. They also predicted little effect on laser speed when the laser power was adjusted to maintain the same heat input.…”

Section: Introductionmentioning

confidence: 99%

“…They also predicted little effect on laser speed when the laser power was adjusted to maintain the same heat input. Wang et al [21] predict compressive vertical stresses within the mid region of their structures and tensile stresses towards the edges. This is in good agreement with Rangaswamy et al [20], but unfortunately, the accompanying experiments in [21] were of insufficient quality to conclusively verify the models.…”

Section: Introductionmentioning

confidence: 99%

Residual stresses in laser direct metal deposited Waspaloy

Moat

Pinkerton

et al. 2011

Materials Science and Engineering: A

169

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“…A lot of investigations have been reported to promote these processes for TDM materials development and rapid manufacturing by direct fabricating functional shapes or by enhancing, repairing, or re-configuring existing TDM with affordable cost [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. However, it is also realized that some of these processes might only produce a ''near-net'' shape with rough surface finish and low-dimensional accuracy [4,5,22,23] and, thus, post-machining is a must, which, more or less, could diminish the attractiveness of the processes.…”

Section: Introductionmentioning

confidence: 99%

Freeform Laser Consolidated H13 and CPM 9V Tool Steels

Xue

Chen

Wang

2013

Metallogr. Microstruct. Anal.

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As a novel computer-aided materials additive manufacturing process, the freeform laser consolidation (LC) can directly produce functional shapes (features or structures) through a ''layer-upon-layer'' deposition. In this research, LC processability of both H13 and CPM 9V tool steels and their mechanical performance thus obtained were investigated. Both laser-consolidated tool steels were metallurgically sound with no crack, exhibiting layer-wise refined solidified structures with dominated martensite and small amount of retained austenite, as well as compositiondependent carbides. Laser-consolidated H13 could outperform its wrought counterpart mechanically as measured by tensile strength/strain, and bonding strength as well as sliding wear resistance; laser-consolidated CPM 9V could provide excellent sliding wear resistance superior to the conventional widely used tool steel (such as wrought D2). These unique microstructures and mechanical properties could be tailored for niche applications in additive manufacturing of tools, molds, and dies.

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Residual stresses in LENS-deposited AISI 410 stainless steel plates

Cited by 118 publications

References 17 publications

An Experimental Investigation into Additive Manufacturing-Induced Residual Stresses in 316L Stainless Steel

An Experimental Investigation into Additive Manufacturing-Induced Residual Stresses in 316L Stainless Steel

Residual stresses in laser direct metal deposited Waspaloy

Freeform Laser Consolidated H13 and CPM 9V Tool Steels

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