Comparative study of commercially pure titanium produced by laser engineered net shaping, selective laser melting and casting processes

Attar, Hooyar; Ehtemam-Haghighi, Shima; Kent, Damon; Wu, Xinhua; Dargusch, Matthew S.

doi:10.1016/j.msea.2017.08.103

Cited by 206 publications

(87 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Also, current advances in biotechnology and biomechanics induce the development of new materials and surface treatments that aim to increase wear and corrosion strength, or improve features, which allows the promotion of the biointegration of materials [4][5][6][7][8]. Laser processing techniques imply the ability to perform changes on surface material without direct contact [9][10][11][12][13]. This feature results in a relatively clean and precise process, due to an excellent control over the heat absorption on the affected area, and the possibility of focusing the laser beam on small areas of the surface.…”

Section: Introductionmentioning

confidence: 99%

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Salguero

Batista

et al. 2017

Coatings

View full text Add to dashboard Cite

Surface engineering is widely used in different areas, such as the aerospace industry or the biomechanical and medical fields. Specifically, laser surface modification techniques may obtain specific surface finishes for special applications. In texturing laser procedures, the control of processing parameters has a great influence on the geometry and characteristics of the treated area. When these processes are carried out on titanium alloys, thin oxide layers are usually developed on the irradiated surface, formed through the thermochemical combination of vaporized material with atmospheric oxygen in the air. In thermal oxidation treatments of Ti6Al4V, the highest concentration of oxides is mainly composed by rutile (TiO 2 ), producing surface property modifications such as hardness, among others. In this research, a thermochemical oxidation of Ti6Al4V alloy has been performed through laser texturing, using laser scanning speed (V s ) and pulse rate (f ) as process control variables, and its influence on the beam absorption capacity of the modified layer have been analyzed. Combined evaluations of microgeometrical features and mechanical properties, such as hardness, verified that, by means of laser texturing treatments, the ability to generate specific topographies and increase the initial hardness of the alloy is obtained. The most advantageous results for the increase of hardness by thermochemical oxidation have been detected in low scan speeds of laser beam treatments, resulting in an increase of approximately 270% using a scanning speed of 10 mm/s. On the other hand, a dependence between roughness values, in terms of R a and R z , and the energy density of pulse (E d ) has been observed, showing higher values of roughness for a 17.68 J/cm 2 energy density of pulse.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Salguero

Batista

et al. 2017

Coatings

View full text Add to dashboard Cite

show abstract

“…SLM has higher cooling rate than EBM, resulting in coarser microstructure, higher tensile strength, and lower ductility than parts [46]. Both SLM and LENS were used to produce commercial pure titanium samples with mechanical properties better than conventional methods [47]. The cooling rate in SLM is also higher, which resulted in finer microstructure and therefore produced more desirable mechanical properties.…”

Section: Manufacturingmentioning

confidence: 99%

Lattice Structures and Functionally Graded Materials Applications in Additive Manufacturing of Orthopedic Implants: A Review

Mahmoud

Elbestawi

2017

JMMP

201

117

View full text Add to dashboard Cite

A major advantage of additive manufacturing (AM) technologies is the ability to print customized products, which makes these technologies well suited for the orthopedic implants industry. Another advantage is the design freedom provided by AM technologies to enhance the performance of orthopedic implants. This paper presents a state-of-the-art overview of the use of AM technologies to produce orthopedic implants from lattice structures and functionally graded materials. It discusses how both techniques can improve the implants' performance significantly, from a mechanical and biological point of view. The characterization of lattice structures and the most recent finite element analysis models are explored. Additionally, recent case studies that use functionally graded materials in biomedical implants are surveyed. Finally, this paper reviews the challenges faced by these two applications and suggests future research directions required to improve their use in orthopedic implants.

show abstract

“…Zou et al [18] investigated the anisotropic properties of the 3D printed material. Microstructural characteristics of the titanium based parts produced by different AM processes and also casting process were investigated by Attar et al [19] and furthermore, the mechanical properties of the parts were evaluated. An alternate way to find elastic moduli of an FDM processed layer is by employing computational or analytical methods.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization of Additively Manufactured Parts by FE Modeling of Mesostructure

Somireddy

Czekanski

2017

JMMP

View full text Add to dashboard Cite

Abstract:In the present study, the mesostructure of a fused deposition modeling (FDM) processed part is considered for the investigation of its mechanical behavior. The layers of FDM printed part behave as a unidirectional fiber reinforced laminae, which are treated as an orthotropic material. The finite element (FE) procedure to find elastic moduli of a layer of the FDM processed part is presented. The mesostructure of the part that would be obtained from the process is replicated in FE models in order to find stiffness matrix of a layer. Two distinctive architectures of mesostructure are considered in the study to predict the mechanical behavior of the parts. Also, influences of layer thickness, road shape and air gap on the elastic properties of a material are investigated. Further, the parts fabricated with FDM process are treated as laminate structures. From the numerical results, it is seen that the elastic moduli are governed by mesostructures. Our laminate results are validated with experimental to demonstrate the use of classical laminate theory (CLT) for FDM parts. The elastic moduli (E 1 , E 2 , G 12 , ν 12 ) of a layer used in the analysis are calculated from FE simulations. This study establishes relationship between mesostructure and macro mechanical properties of the part.

show abstract

Comparative study of commercially pure titanium produced by laser engineered net shaping, selective laser melting and casting processes

Cited by 206 publications

References 55 publications

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Lattice Structures and Functionally Graded Materials Applications in Additive Manufacturing of Orthopedic Implants: A Review

Mechanical Characterization of Additively Manufactured Parts by FE Modeling of Mesostructure

Contact Info

Product

Resources

About