The laser additive manufacture of Ti-6Al-4V

Kobryn, P. A.; Semiatin, S. L.

doi:10.1007/s11837-001-0068-x

Cited by 271 publications

(134 citation statements)

References 2 publications

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“…In the case of electron beam AM processing where the solidification/cooling rates are somewhat slower, the alpha laths (hcp) are produced via phase transformation of prior beta (bcc) upon cooling below the beta transus (1000°C), while the morphology and crystallography of the prior beta grains are dependent on the cooling rate and build direction. 38,45 As such, electron backscatter diffraction (EBSD) techniques are often used first to capture the crystallography and morphology of the room temperature alpha phase, followed by reconstruction of the prior beta phase using the Burger orientation relationship between alpha and beta, 46 as explained below.…”

Section: Microstructure and Defect Characterization/quantificationmentioning

confidence: 99%

Overview of Materials Qualification Needs for Metal Additive Manufacturing

Seifi

Salem

Beuth

et al. 2016

JOM

501

183

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This overview highlights some of the key aspects regarding materials qualification needs across the additive manufacturing (AM) spectrum. AM technology has experienced considerable publicity and growth in the past few years with many successful insertions for non-mission-critical applications. However, to meet the full potential that AM has to offer, especially for flightcritical components (e.g., rotating parts, fracture-critical parts, etc.), qualification and certification efforts are necessary. While development of qualification standards will address some of these needs, this overview outlines some of the other key areas that will need to be considered in the qualification path, including various process-, microstructure-, and fracture-modeling activities in addition to integrating these with lifing activities targeting specific components. Ongoing work in the Advanced Manufacturing and Mechanical Reliability Center at Case Western Reserve University is focusing on fracture and fatigue testing to rapidly assess critical mechanical properties of some titanium alloys before and after post-processing, in addition to conducting nondestructive testing/evaluation using micro-computerized tomography at General Electric. Process mapping studies are being conducted at Carnegie Mellon University while large area microstructure characterization and informatics (EBSD and BSE) analyses are being conducted at Materials Resources LLC to enable future integration of these efforts via an Integrated Computational Materials Engineering approach to AM. Possible future pathways for materials qualification are provided.

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Section: Microstructure and Defect Characterization/quantificationmentioning

confidence: 99%

Overview of Materials Qualification Needs for Metal Additive Manufacturing

Seifi

Salem

Beuth

et al. 2016

JOM

501

183

View full text Add to dashboard Cite

show abstract

“…In this regard, the solidification map (see Fig. 9) suggested by Kobryn and Semiatin [1] is useful for predicting the solidification microstructure and can even be served for microstructural design. The two parameters, R and G, that are crucial for composing the solidification map can be measured and/or calculated as follows:…”

Section: Solidification Mapmentioning

confidence: 99%

“…Additive manufacturing (AM) is the newest powder metallurgy (PM) technique [1][2][3] while Ti-6Al-4V is the single most important Ti alloy [4][5][6][7][8][9]. AM Ti-6Al-4V is being widely pursed by research community and industry for its capability to produce complicated, net-shape engineering parts and/or customised, biomedical implants.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Densification, Microstructure and Mechanical Property of Additively Manufactured Ti-6Al-4V — Comparison among Selective Laser Melting, Electron Beam Melting, Laser Metal Deposition and Selective Laser Sintering, and with Conventional Powder

Yan¹,

Yu²

2015

Sintering Techniques of Materials

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“…Recent studies have been shown that additive manufacturing (AM) technologies could represent sustainable production routes for metals and, in particular, precious metals such as titanium alloys [1,2]. There are several advantages related to the production of titanium components by AM.…”

Section: Introductionmentioning

confidence: 99%

Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

Simonelli

Tse

Tuck

2014

Materials Science and Engineering: A

806

288

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originates from the AM process. To understand the effect of the microstructure on the tensile properties, selective laser melted (SLM) Ti-6Al-4V samples built in three different orientations were tensile tested. The investigated samples were near fully dense, in two distinct conditions, as-built and stress relieved respectively. It was found that the build orientation affects the tensile properties, and in particular the ductility of the samples. The mechanical anisotropy of the parts was discussed in relation to the crystallographic texture, phase composition and the predominant fracture mechanisms. Fractography and electron backscatter diffraction (EBSD) results indicate that the predominant fracture mechanism is 2 intergranular fracture along the grain boundaries present and thus provide and explanation for the typical fracture surface features observed in fracture AM Ti-6Al-4V.

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The laser additive manufacture of Ti-6Al-4V

Cited by 271 publications

References 2 publications

Overview of Materials Qualification Needs for Metal Additive Manufacturing

Overview of Materials Qualification Needs for Metal Additive Manufacturing

An Overview of Densification, Microstructure and Mechanical Property of Additively Manufactured Ti-6Al-4V — Comparison among Selective Laser Melting, Electron Beam Melting, Laser Metal Deposition and Selective Laser Sintering, and with Conventional Powder

Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

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