Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting

Liu, Yujing; Wang, H. L.; Li, S. J.; Wang, S. G.; Wang, W. J.; Hou, Wentao; Hao, Yulin; Yang, Rui; Zhang, Lai-Chang

doi:10.1016/j.actamat.2016.12.052

Cited by 282 publications

(102 citation statements)

References 37 publications

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“…%) and a few other commercial alloys. Limited research is present in the existing literature about AM processing of metastable beta Ti alloys but a few recent studies have been reported using electron beam (e-beam) melting (EBM) [175][176][177][178][179] and selective laser melting (SLM) [177,[180][181][182]. Much of this research has been focused on optimizing processing conditions or evaluating processing-structure-property relationships of Ti-24Nb-4Zr-8Sn (wt.…”

Section: Additive Manufacturingmentioning

confidence: 99%

“…Much of this research has been focused on optimizing processing conditions or evaluating processing-structure-property relationships of Ti-24Nb-4Zr-8Sn (wt. %) alloys also known as Ti2448 alloy [175][176][177][178][179][180]. This alloy was developed for use in biomedical implants owing to its low modulus of elasticity and lack of elements with known toxicity in the human body.…”

Section: Additive Manufacturingmentioning

confidence: 99%

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A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

425

168

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Abstract:In this article, we provide a broad and extensive review of beta titanium alloys. Beta titanium alloys are an important class of alloys that have found use in demanding applications such as aircraft structures and engines, and orthopedic and orthodontic implants. Their high strength, good corrosion resistance, excellent biocompatibility, and ease of fabrication provide significant advantages compared to other high performance alloys. The body-centered cubic (bcc) β-phase is metastable at temperatures below the beta transus temperature, providing these alloys with a wide range of microstructures and mechanical properties through processing and heat treatment. One attribute important for biomedical applications is the ability to adjust the modulus of elasticity through alloying and altering phase volume fractions. Furthermore, since these alloys are metastable, they experience stress-induced transformations in response to deformation. The attributes of these alloys make them the subject of many recent studies. In addition, researchers are pursuing development of new metastable and near-beta Ti alloys for advanced applications. In this article, we review several important topics of these alloys including phase stability, development history, thermo-mechanical processing and heat treatment, and stress-induced transformations. In addition, we address recent developments in new alloys, phase stability, superelasticity, and additive manufacturing.

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Section: Additive Manufacturingmentioning

confidence: 99%

Section: Additive Manufacturingmentioning

confidence: 99%

A Review of Metastable Beta Titanium Alloys

Kolli

Devaraj

2018

Metals

425

168

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“…Selective laser melting (SLM) is one of the major AM technologies that has been used to process a number of metals and alloys, e.g., Ti6Al4V [7], β-type Ti-24Nb-4Zr-8Sn [8,9], Ni superalloy [10] and 316L stainless steel (316L SS) [11], for a wide range of applications, including bone implants [12], turbine blades [13] and automotive pistons [3]. In SLM technology, the laser beam is used to completely melt metal powder layers spread on a powder bed to form near-net-shaped components.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Porosity and Microhardness of 316L Stainless Steel Fabricated by Selective Laser Melting

Yusuf

Chen

Boardman

et al. 2017

Metals

140

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This study investigates the porosity and microhardness of 316L stainless steel samples fabricated by selective laser melting (SLM). The porosity content was measured using the Archimedes method and the advanced X-ray computed tomography (XCT) scan. High densification level (≥99%) with a low average porosity content (~0.82%) were obtained from the Archimedes method. The highest porosity content in the XCT-scanned sample was~0.61. However, the pores in the SLM samples for both cases (optical microscopy and XCT) were not uniformly distributed. The higher average microhardness values in the SLM samples compared to the wrought manufactured counterpart are attributed to the fine microstructures from the localised melting and rapid solidification rate of the SLM process.

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“…Role of porosity A comparative study of Ti-6Al-4V and Ti2448 alloy on the effect of porosity on mechanical properties indicated that both the compressive strength and yield strength decreased with increased porosity for both the alloys [76]. It was observed that Ti-6Al-4V alloy with identical porosity (75%) built using the same unit cell shape exhibited higher compressive strength and Young's modulus of ~60 MPa and 3.0 ± 0.6 GPa, respectively in comparison to the Ti2448 alloy sample of~38 MPa and~1.44 ± 0.2 GPa.…”

Section: Role Of Unit Cell Designmentioning

confidence: 99%

Advancements in three-dimensional titanium alloy mesh scaffolds fabricated by electron beam melting for biomedical devices: mechanical and biological aspects

Nune

Misra

2017

Sci. China Mater.

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We elucidate here the process-structure-property relationships in three-dimensional (3D) implantable titanium alloy biomaterials processed by electron beam melting (EBM) that is based on the principle of additive manufacturing. The conventional methods for processing of biomedical devices including freeze casting and sintering are limited because of the difficulties in adaptation at the host site and difference in the micro/macrostructure, mechanical, and physical properties with the host tissue. In this regard, EBM has a unique advantage of processing patient-specific complex designs, which can be either obtained from the computed tomography (CT) scan of the defect site or through a computeraided design (CAD) program. This review introduces and summarizes the evolution and underlying reasons that have motivated 3D printing of scaffolds for tissue regeneration. The overview comprises of two parts for obtaining ultimate functionalities. The first part focuses on obtaining the ultimate functionalities in terms of mechanical properties of 3D titanium alloy scaffolds fabricated by EBM with different characteristics based on design, unit cell, processing parameters, scan speed, porosity, and heat treatment. The second part focuses on the advancement of enhancing biological responses of these 3D scaffolds and the influence of surface modification on cell-material interactions. The overview concludes with a discussion on the clinical trials of these 3D porous scaffolds illustrating their potential in meeting the current needs of the biomedical industry.

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Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting

Cited by 282 publications

References 37 publications

A Review of Metastable Beta Titanium Alloys

A Review of Metastable Beta Titanium Alloys

Investigation on Porosity and Microhardness of 316L Stainless Steel Fabricated by Selective Laser Melting

Advancements in three-dimensional titanium alloy mesh scaffolds fabricated by electron beam melting for biomedical devices: mechanical and biological aspects

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