Laser-aided manufacturing technologies; their application to the near-net shape forming of a high-strength titanium alloy

Blackwell, Paul; Wisbey, A.

doi:10.1016/j.jmatprotec.2005.05.014

Cited by 72 publications

(28 citation statements)

References 5 publications

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“…45 Compared with parts made by conventional manufacturing processes, AM-fabricated components show promising properties for most metallic materials. 2,[46][47][48] However, the presence of shrinkage porosity and residual stress can affect their static and dynamic properties depending on the applied AM technique and processing parameters. Thus, post-AM processing is another important direction of investigation.…”

Section: Properties and Performance Of Additive Manufactured Materialsmentioning

confidence: 99%

Additive Manufacturing: Making Imagination the Major Limitation

Zhai

Lados

LaGoy³

2014

JOM

258

125

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Additive manufacturing (AM) refers to an advanced technology used for the fabrication of three-dimensional near-net-shaped functional components directly from computer models, using unit materials. The fundamentals and working principle of AM offer several advantages, including near-net-shape capabilities, superior design and geometrical flexibility, innovative multimaterial fabrication, reduced tooling and fixturing, shorter cycle time for design and manufacturing, instant local production at a global scale, and material, energy, and cost efficiency. Well suiting the requests of modern manufacturing climate, AM is viewed as the new industrial revolution, making its way into a continuously increasing number of industries, such as aerospace, defense, automotive, medical, architecture, art, jewelry, and food. This overview was created to relate the historical evolution of the AM technology to its state-of-the-art developments and emerging applications. Generic thoughts on the microstructural characteristics, properties, and performance of AM-fabricated materials will also be discussed, primarily related to metallic materials. This write-up will introduce the general reader to specifics of the AM field vis-à-vis advantages and common techniques, materials and properties, current applications, and future opportunities.

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Section: Properties and Performance Of Additive Manufactured Materialsmentioning

confidence: 99%

Additive Manufacturing: Making Imagination the Major Limitation

Zhai

Lados

LaGoy³

2014

JOM

258

125

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“…This led to the development of various time-compression technologies, including Laminated Object Manufacturing (LOM), Selective Laser Sintering (SLS), Laser Rapid Manufacturing (also known as Laser Engineered Net Shaping (LENS), Direct Metal Deposition (DMD), Automated Light Fabrication (ALF) and Solid Freeform Fabrication (SFF)) etc. [1][2][3][4][5][6][7][8]. Laser rapid manufacturing (LRM) is an emerging computer aided manufacturing methodology that employs a high power laser beam to deposit clad layer and build up three-dimensional component in a layer-by layer fashion [8].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its attractive attributes LRM forms an active area of research with different names at various laboratories around the world. Related literature in this area is focused on process development, its viability for specific end applications, parameter standardization for controlling structural features and mechanical properties of resultant structures [2][3][4][5][6]. Paul et al have reported optimization of process parameters for LRM of Inconel 625 (IN-625) structures [9].…”

Section: Introductionmentioning

confidence: 99%

“…There are a few published reports on fatigue and fracture toughness characterization of Laser Rapid Manufactured (LRMed) structures. Blackwell and Wisbey [2] reported tensile strength and fracture toughness of Ti-6Al-4V alloy structures fabricated by LENS process. Xeu et al have reported that presence of unmelted/partially melted particles adversely affect fatigue life of LENS-processed structures [11].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of fracture toughness and impact toughness of laser rapid manufactured Inconel-625 structures and their co-relation

et al. 2014

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Abstract:The present study involves evaluation of fracture toughness (crack tip opening displacement) and Chapry impact toughness of Inconel 625 structures fabricated by laser based additive manufacturing. The results of fracture toughness are close to those reported for the Inconel 625 weld metal. The nature of the load-time traces of instrumented Charpy impact tests revealed that the alloy Inconel 625 in laser fabricated condition was associated with fully ductile behavior with Charpy-V notch impact energy in the range of 48-54 J. Stress relieving heat treatment at 950 °C for 1 hour has resulted in marginal improvement in the impact toughness by about 10 %, whereas no clear evidence of such improvement is seen in the CTOD fracture toughness. Fractographic examination of the Chapry specimens and the results of the instrumented impact tests imply that the mechanism of crack growth was propagation controlled under dynamic loading conditions. Dynamic fracture parameters were estimated from the instrumented impact test data and compared with the experimentally evaluated fracture toughness results.

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“…Laser direct deposition has proved to be a flexible manufacturing process, enabling the fabrication of fully dense functional components via a layer-by-layer additive process, which presents good prospects for the direct manufacturing of one-of-a-kind or small series of components and for the repairing of high added-value parts. Presently, researches on laser direct deposition are mainly focused on titanium and nickel base alloys and stainless steel [4][5][6][7][8][9][10]. In the present work, thin walls of CuNi17Al3Fe1.5Cr alloy were prepared by the multi-layer laser direct deposition process.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of laser direct deposited CuNi17Al3Fe1.5Cr alloy

Zhang

Huang

Vilar³

2011

Int J Miner Metall Mater

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Thin walls of a copper-base alloy with the nominal composition CuNi17Al3Fe1.5Cr were successfully prepared by laser direct deposition additive manufacturing. The microstructure, as revealed by optical and scanning electron microscopy, indicated that the deposited material was fully dense and with a dendritic microstructure. The dendrites are parallel to the build-up direction, which is also the heat conduction direction during deposition. X-ray diffraction analysis results show that the deposited material is composed of a single phase and a copper-based solid solution. Some precipitate particles of metal silicides were observed in the interdendritic region by scanning electron microscopy. The ultimate tensile strength along the laser scanning direction reaches 735 MPa. The hardness is about Hv 0.1 300.

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Laser-aided manufacturing technologies; their application to the near-net shape forming of a high-strength titanium alloy

Cited by 72 publications

References 5 publications

Additive Manufacturing: Making Imagination the Major Limitation

Additive Manufacturing: Making Imagination the Major Limitation

Evaluation of fracture toughness and impact toughness of laser rapid manufactured Inconel-625 structures and their co-relation

Microstructure and properties of laser direct deposited CuNi17Al3Fe1.5Cr alloy

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