In situ shear behavior of open-cell austenitic 316L steel foams

Kaya, Ali Can

doi:10.1016/j.matchemphys.2020.123303

Cited by 10 publications

(9 citation statements)

References 43 publications

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“…Finally, a lower slope with nearly constant stress in the shear stress-strain curve is denoted as the shearing region. Kaya (2020) has reported a similar shear stress-strain curve for a 316L open-cell stainless steel (SS) foam. The SS foam owns high ductility and experiences a high plasticity.…”

Section: Discussionmentioning

confidence: 85%

“…The brazing temperature was selected based on the highest shear strength (Figure 4). Generally, a shear stress-strain curve of Cu/Cu foam brazed joint can be divided into four regions which are elastic, plateau, densification, and shearing (Kaya, 2020). Side-view BSE images of Cu substrate surface from the Cu/Cu foam shear fracture were also captured as shown in Figure 7.…”

Section: Shear Strength Of Cu/cu Foam Brazed Joint Interfacementioning

confidence: 99%

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Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

et al. 2021

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Utilization of open-cell metal foams in functional applications such as in energy absorption, noise absorber, heat insulator, and lightweight panels is trending in many industrial applications. The development of reliable joining technologies for sandwiched metal foams is crucial for thermal application and one of the techniques used is brazing process. In the current work, copper foam was sandwiched between a copper plate using amorphous filler of Cu-9.7Sn-5.7Ni-7.0P (Cu: copper, Sn: tin, Ni: nickel, and P: phosphorus) via brazing technique. The shear test was conducted on the brazed joint interface of copper/copper foam, while the compressive test was carried out on the brazed sample. Microstructures of the copper substrate surface obtained from the shear fracture of brazed copper/copper foam show the tear region and cleavage fractures. The stress–strain curve of shear and compressive strength explains the deformation behavior of the brazed sample.

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Section: Discussionmentioning

confidence: 85%

Section: Shear Strength Of Cu/cu Foam Brazed Joint Interfacementioning

confidence: 99%

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

et al. 2021

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“…The matrix consists of a martensite‐structure making it extremely hard and extremely brittle, unlike 316L stainless steel, which is composed of austenitic exhibiting excellent work‐hardening tendency. [ 31–33 ] Therefore, the strain hardening phenomenon of the 17‐4PH porous steel can be attributed to the porous structure and cell wall thickness.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of 17‐4PH Stainless Steel Foam by a Pressureless Powder Space Holder Technique

Hsu¹,

Tzeng

Chen³

et al. 2021

Adv Eng Mater

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High compressive strength closed‐cell porous 17‐4PH precipitation hardening stainless steel with three different porosities (30%, 40%, and 50%, volume percent) was manufactured using a novel pressureless powder space holder method. The compressive strengths of the as‐sintered 17‐4PH stainless steel foam with porosities of 30%, 40%, and 50% are 420, 275, and 187 MPa, respectively. The application of an H900 heat treatment to the as‐sintered porous 17‐4PH stainless steel can effectively improve the compressive strength due to the precipitation of ϵ‐Cu phases. It is shown that with this pressureless powder space holder method, it can efficiently produce closed‐cell porous 17‐4PH stainless steel and control its porosity.

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“…The difference was attributed to errors in the FE models used for computation. In a recent study [ 19 ] that included modeling of open‐cell steel foams based on X‐ray CT, we showed that the difference between the computational and experimental results is due to defects and micropores observed experimentally but not reproduced in silico. Furthermore, the rough‐cut surfaces of the samples used for the real experiments were not reproduced in the simulations, where a “perfect” surface was obtained by virtual slices in the tomographic data.…”

Section: Introductionmentioning

confidence: 84%

“…Previous studies [14][15][16][17]19] have excluded damage models of the material in foam simulations as mostly isotropic hardening or perfectly plastic behavior was assigned to the material. In some studies, [14][15][16][17]19] the authors actually obtained reasonably good agreement between experimental and FE results. However, those studies analyzed relatively ductile materials such as Al and stainless steels.…”

Section: Foam Modeling Of Whole Foams With a Damage Modelmentioning

confidence: 99%

Modeling of Complex Gray Cast Iron Open‐Cell Foams Revealing Insights on Failure and Deformation on Different Hierarchical Length‐Scales

2021

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Open‐cell gray cast iron foams are a class of porous materials of increasing interest, with great potential to be used in energy damping applications and for sound isolation. We created finite element (FE) models from 3D reconstructed data of foams and of isolated struts imaged with resolutions spanning from 0.65 to 10.5 μm. Representative volume elements (RVE) are loaded in tension to simulate and analyze foam mechanical behavior. A ductile damage model is used for tensile testing of single struts and compression testing of foams. RVEs loaded along three axes demonstrate important effects of orientation of graphite particles in the microstructure. Only simulation results that take failure into consideration are consistent with experimental findings. Strut fracture initiation strongly depends on the cross‐sectional area and its circularity and foam simulation results are heavily influenced by damage modeling. The complexity of the open‐cell foam behavior is revealed at several hierarchical levels. Simulations in which material properties are assigned excluding damage overestimate the experimental results of the foam; conversely, a very good agreement is observed if damage is considered. The models exhibiting anisotropic mechanical properties fully reproducing large fluctuations in the mechanical properties of the struts are observed in in situ experiments.

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In situ shear behavior of open-cell austenitic 316L steel foams

Cited by 10 publications

References 43 publications

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

Deformation and Fracture Behavior of Sandwiched Copper Foam Brazed Joint Using Amorphous Copper–Tin–Nickel–Phosphorus Filler

Fabrication of 17‐4PH Stainless Steel Foam by a Pressureless Powder Space Holder Technique

Modeling of Complex Gray Cast Iron Open‐Cell Foams Revealing Insights on Failure and Deformation on Different Hierarchical Length‐Scales

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