scholarly journals Titanium Alloy Repair with Wire-Feed Electron Beam Additive Manufacturing Technology

2019 ◽  
Vol 2019 ◽  
pp. 1-23 ◽  
Author(s):  
P. Wanjara ◽  
K. Watanabe ◽  
C. de Formanoir ◽  
Q. Yang ◽  
C. Bescond ◽  
...  
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Three Dimensional ◽  
Manufacturing Technology ◽  
Image Correlation ◽  
Fatigue Properties ◽  
Wall Structure ◽  
Operational Environment ◽  
Additive Manufacturing Technology ◽  
Wire Feed

Wire feeding can be combined with different heat sources, for example, arc, laser, and electron beam, to enable additive manufacturing and repair of metallic materials. In the case of titanium alloys, the vacuum operational environment of electron beam systems prevents atmospheric contamination during high-temperature processing and ensures high performance and reliability of additively manufactured or repaired components. In the present work, the feasibility of developing a repair process that emulates refurbishing an “extensively eroded” fan blade leading edge using wire-feed electron beam additive manufacturing technology was examined. The integrity of the Ti6Al4V wall structure deposited on a 3 mm thick Ti6Al4V substrate was verified using X-ray microcomputed tomography with a three-dimensional reconstruction. To understand the geometrical distortion in the substrate, three-dimensional displacement mapping with digital image correlation was undertaken after refurbishment and postdeposition stress relief heat treatment. Other characteristics of the repair were examined by assessing the macro- and microstructure, residual stresses, microhardness, tensile and fatigue properties, and static and dynamic failure mechanisms.

Mechanical Behavior and Microstructure of Electron Beam Melted Ti-6Al-4V Using Digital Image Correlation

2016 ◽  
Author(s):  
Mohammad Shafinul Haque ◽  
Edel Arrieta ◽  
Jorge Mireles ◽  
Cesar Carrasco ◽  
Calvin M. Stewart ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Digital Image Correlation ◽  
Tensile Test ◽  
Image Correlation ◽  
Test Results ◽  
Strain Fields ◽  
Additive Manufacturing Technology ◽  
Zero Degree

The reputation of additive manufacturing technology has increased dramatically in recent years due to its freedom of design, customization, and waste minimization. The growing demand for complex profile components to achieve more economic and strength-to-weight efficient aero-engine components can be met by additive manufacturing technology. In this study, electron beam melting (EBM), a powder bed additive layer manufacturing process, is used to manufacture Ti-6Al-4V tensile specimens. The Ti-6AL-4V alloy has excellent corrosion and high temperature resistance with a high strength-to-weight ratio. It is widely used in the power generation, aerospace, and medical industries. An Arcam Ti-6Al-4V prealloyed powder with particle sizes ranging from 45μ–100μ is used in an Arcam A2 machine to manufacture three specimens at zero degree manufacturing orientation. The zero degree manufacturing orientation is expected to exhibit a higher strength over other orientations. The EBM manufacturing parameters were set at 15mA current and 4530 mm/sec beam speed. Tensile tests were performed at room temperature (25.5°C) under a strain rate of 0.003 mm/mm/min according to the ASTM E8 standard for strain-rate sensitive materials. Stress-strain curves are plotted and discussed. Tensile test results indicate a tensile strength of 1.2 GPa and an elongation of 8% approximately. Three Dimensional Digital Image Correlation (3D-DIC) is used to measure the full strain field and deformation evolution on the surface of the specimens. The 3D-DIC system compares digital photographs (taken at two different angles simultaneously) of the surface of a specimen and calculates the deformation and strain fields. Using the strain fields the mechanical properties are determined by the relationships in the strain tensor. The tensile test results show that for a zero degree manufacturing orientation, the yield strength (YS) and ultimate tensile strength (UTS) are higher than that typically reported for wrought products. Fractography using optical microscopy (OM) and Scanning Electron Microscopy (SEM) were conducted. Micrographs of transverse section of the specimen were obtained to identify and analyze the failure mechanism that took place during testing. The built direction, presence of voids, manufacturing defects, and unmelted particles are observed from the SEM views. Surface roughness and microstructure were observed in the OM. A comparison of the obtained results with the literature for additively manufactured Ti-6Al-4V and possible causes are discussed.

Customizing Food with an Additive Manufacturing Technology

2012 ◽  
Vol 713 ◽  
pp. 43-48
Author(s):  
L. Serenó ◽  
J. Delgado ◽  
Joaquim de Ciurana
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Three Dimensional ◽  
Manufacturing Technology ◽  
Manufacturing Costs ◽  
Three Dimensional Objects ◽  
Additive Manufacturing Technology ◽  
Qualified Personnel ◽  
Broad Variety ◽  
Traditional Technologies

The development of open Additive Manufacturing (AM) technologies, such as the Fab@Home system, has emerged as a freeform approach capable of producing complex three-dimensional objects with a broad variety of materials. The main objective of this work is to analyze and optimize the manufacturing capacity of this system when producing 3D edible objects. A new heated syringe deposition tool was developed and several process parameters were optimized to adapt this technology to consumers needs. The results revealed in this study show the potential of this system to produce customized edible objects without qualified personnel knowledge, therefore saving manufacturing costs compared to traditional technologies.

scholarly journals Joining of Inconel 718 and 316 Stainless Steel using electron beam melting additive manufacturing technology

2016 ◽  
Vol 94 ◽  
pp. 17-27 ◽  
Author(s):  
Alejandro Hinojos ◽  
Jorge Mireles ◽  
Ashley Reichardt ◽  
Pedro Frigola ◽  
Peter Hosemann ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Inconel 718 ◽  
Electron Beam Melting ◽  
Manufacturing Technology ◽  
316 Stainless Steel ◽  
Additive Manufacturing Technology

scholarly journals Three-dimensional bioprinting speeds up smart regenerative medicine

2016 ◽  
Vol 3 (3) ◽  
pp. 331-344 ◽  
Author(s):  
Qi Gu ◽  
He Zhu ◽  
Jing Li ◽  
Xia Li ◽  
Jie Hao ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Resolution ◽  
3D Printing ◽  
Regenerative Medicine ◽  
Cell Fate ◽  
Control Cell ◽  
Three Dimensional ◽  
Manufacturing Technology ◽  
The State ◽  
Additive Manufacturing Technology

Abstract Biological materials can actively participate in the formation of bioactive organs and can even control cell fate to form functional tissues that we name as the smart regenerative medicine (SRM). The SRM requires interdisciplinary efforts to finalize the pre-designed organs. Three-dimensional (3D) printing, as an additive manufacturing technology, has been widely used in various fields due to its high resolution and individuation. In SRM, with the assistance of 3D printing, cells and biomaterials could be precisely positioned to construct complicated tissues. This review summarizes the state of the SRM advances and focuses in particular on the 3D printing application in biofabrication. We further discuss the issues of SRM development and finally propose some approaches for future 3D printing, which involves SRM.

Design and Simulation of Ti6Al4V Cartilage Scaffold Based on Additive Manufacturing Technology

2021 ◽  
Vol 1032 ◽  
pp. 114-119
Author(s):  
Han Jun Gao ◽  
Hao Yuan ◽  
Jian Qiang Xia ◽  
Hong Wei Li ◽  
Yi Du Zhang
Keyword(s):  
Fatigue Life ◽  
Additive Manufacturing ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Simulation Models ◽  
Biomechanical Properties ◽  
Manufacturing Technology ◽  
Cartilage Tissue ◽  
Tissue Scaffold ◽  
Additive Manufacturing Technology

The combination of additive manufacturing technology and cartilage tissue scaffold construction provides a new way for clinical treatment of cartilage injury. The high priority of the cartilage scaffold is closely related to the excellent biomechanical properties, fatigue life and medical performance. In this paper, three kinds of cartilage scaffolds are designed, and three-dimensional parametric geometric and numerical simulation models are established. Based on the simulation analysis and comparison of the three kinds of scaffolds, a scaffold model is finally determined. The porosity reaches 87.38%, the equivalent elastic modulus is 9.64Gpa, and it has permanent fatigue life in service environment. It concluded that the designed Ti6Al4V titanium alloy scaffold is suitable for cartilage transplantation.

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