Residual Stress within Metallic Model Made by Selective Laser Melting Process

Shiomi, Masanori; Osakada, Kozo; Nakamura, Kenta; Yamashita, Takashi; Abe, Fumie

doi:10.1016/s0007-8506(07)60677-5

Cited by 470 publications

(253 citation statements)

References 4 publications

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“…Consequently, the stress gradient obtained by Shiomi et al cannot be discussed . Next, the relatively high values of residual stresses determined (Shiomi et al, 2004) are probably due to the specific SLM parameters used . If one compares this method with the welding process, it is well known (Wohlfart , 1986; Lieurade , 1987) that the level of residual stresses, but also their sign, strongly depend on the welding parameters and especially on the energy flux transferred to the sample.…”

Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 96%

“…• A pore size greater than 100 µm to facilitate bone colonization (Shiomi et al, 2004;Xue et al, 2007 ;Chen et al, 2009) .…”

Section: Criteria For Elementary Pattern Definitionmentioning

confidence: 99%

“…The average value of Young's modulus of 100 GPa was deduced from these tests . The commonly admitted value of the Poisson's ratio of 0.33 was also used, see Shiomi et al (2004) . For each geometric configuration, the concentration factor of von Mises stress on individual beams constituting the pattern was analysed and compared to the material allowable stress .…”

Section: 3mentioning

confidence: 99%

“…However since positive stresses are obtained on the last face of the cube, attention must be paid to the melting path chosen for bone substitute manufacture . A local heat treatment can be used to reduce this stress, for instance by heating the last melted layer, without any material deposit, by the laser beam used (Shiomi et al, 2004) .…”

Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 99%

“…As no work has been found in the literature concerning residual stress induced by SLM on CP grade 2 titanium, the results obtained in this paper have been qualitatively compared with those on steel provided by Shiomi et al (2004) . The generation of residual stresses by SLM has been studied on a metal composed of 69.6% of standard chrome molybdenum steel, 21.7% of Ni and 8.7% of CuP.…”

Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 99%

See 4 more Smart Citations

Development and mechanical characterization of porous titanium bone substitutes

Barbas

Bonnet

Lipiński

et al. 2012

Journal of the Mechanical Behavior of Biomedical Materials

155

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Commercially Pure Porous Titanium (CPPTi) can be used for surgical implants to avoid the stress shielding effect due to the mismatch between the mechanica l properties of titanium and bone . Most researchers in this area deal with randomly distributed pores or simple architectures in titanium alloys. The control of porosity, pore size and distribution is necessary to obtain implants with mechanical properties close to those of bone and to ensure their osseointegration . The aim of the present work was therefore to develop and characterize such a specific porous structure. First of all, the properties of titanium made by Selective Laser Melting (SLM) were characterized through experimental testing on bulk specimens. An elementary pattern of the porous structure was then designed to mimic the orthotropic properties of the human bone following several mechanical and geometrical criteria . Finite Element Analysis (FEA) was used to optimize the pattern . A porosity of 53% and pore sizes in the range of 860 to 1500 µm were fi.nally adopted . Tensile tests on porous samples were then carried out to validate the properties obtained numerically and identify the failure modes of the sam_ples. Final!y, FE elasto_plastic ana!yses were yerformed on the porous samples in order to propose a failure criterion for the design of porous substitutes . .

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Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 96%

“…• A pore size greater than 100 µm to facilitate bone colonization (Shiomi et al, 2004;Xue et al, 2007 ;Chen et al, 2009) .…”

Section: Criteria For Elementary Pattern Definitionmentioning

confidence: 99%

Section: 3mentioning

confidence: 99%

Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 99%

Section: Elastoplastic Properties Of Cp Ti Grade 2 Processed By Slmmentioning

confidence: 99%

See 3 more Smart Citations

Development and mechanical characterization of porous titanium bone substitutes

Barbas

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Lipiński

et al. 2012

Journal of the Mechanical Behavior of Biomedical Materials

155

View full text Add to dashboard Cite

show abstract

Powder Bed Fusion Processes

2021

Metal Additive Manufacturing

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Lightweight Metal Cellular Structures Fabricated via 3D Printing of Sand Cast Molds

Snelling

Meisel

et al. 2015

Adv Eng Mater

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Cellular structures offer high specific strength and can offer high specific stiffness, good impact absorption, and thermal and acoustic insulation. A major challenge in fabricating cellular structures is joining various components. It is well known that joints, either welded or bolted or bonded with an adhesive, serve as stress concentrators. Here, we overcome this shortcoming by the use of metal casting into 3D printed sand molds for fabricating cellular structures and sandwich panels. Furthermore, the use of 3D printing allows for the fabrication of sand molds without the need for a pattern, and thus enables the creation of cellular structures with designed mesostructure from a bevy of metal alloys. We use the finite element method to numerically analyze the energy absorption capabilities of an octet truss cellular structure created with the proposed manufacturing process and that of a solid block of the same material and area density as the cellular structure. In the numerical simulations, mechanical properties collected through experimental quasi-static compression testing are employed. It is found that indeed the cellular structure absorbs considerably more impact energy over that absorbed by a solid structure of the same weight.

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Residual Stress within Metallic Model Made by Selective Laser Melting Process

Cited by 470 publications

References 4 publications

Development and mechanical characterization of porous titanium bone substitutes

Development and mechanical characterization of porous titanium bone substitutes

Powder Bed Fusion Processes

Lightweight Metal Cellular Structures Fabricated via 3D Printing of Sand Cast Molds

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