scholarly journals Additive manufacturing of metal components – process-material interaction in different process chains

2019 ◽  
Vol 580 ◽  
pp. 012006
Author(s):  
H N Hansen ◽  
J H Hattel ◽  
D B Pedersen ◽  
S Mohanty ◽  
S A Andersen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Chains ◽  
Material Interaction ◽  
Process Material

scholarly journals Standardisation efforts of ISO/TC 261 “Additive Manufacturing”: Reports from 14th and 15th Plenary Meeting

2020 ◽  
Vol 5 (4) ◽  
pp. 317-318
Author(s):  
Eujin Pei
Keyword(s):  
Additive Manufacturing ◽  
Health And Safety ◽  
Quality Parameters ◽  
Test Procedures ◽  
Plenary Meeting ◽  
Software Applications ◽  
Process Chains ◽  
Working Groups

AbstractThe main objective of ISO/TC 261 is to standardise the processes of Additive Manufacturing, the process chains (Data, Materials, Processes, Hard- and Software, Applications), test procedures, quality parameters, supply agreements, environment, health and safety, fundamentals and vocabularies. The technical contents for those standards are developed in different Working Groups of ISO/TC 261. This section provides readers with news regarding standardisation efforts of ISO/TC 261.

Additive Manufacturing of Hot Gas Path Parts and Engine Validation in a Heavy Duty GT

2016 ◽  
Author(s):  
Julius Schurb ◽  
Matthias Hoebel ◽  
Hartmut Haehnle ◽  
Harald Kissel ◽  
Laura Bogdanic ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Performance ◽  
Turbine Blades ◽  
Combustion Process ◽  
Heavy Duty ◽  
Hot Gas ◽  
Process Chains ◽  
Manufacturing Technologies ◽  
Cooling Air

Additive manufacturing and in particular Selective Laser Melting (SLM) are manufacturing technologies that can become a game changer for the production of future high performance hot gas path parts. SLM radically changes the design process giving unprecedented freedom of design and enabling a step change in part performance. Benefits are manifold, such as reduced cooling air consumption through more efficient cooling schemes, reduced emissions through better mixing in the combustion process and reduced cost through integrated part design. GE is already making use of SLM for its gas turbine components based on sound experience for new part production and reconditioning. The paper focuses on: a) Generic advantages of rapid manufacturing and design considerations for hot gas path parts b) Qualification of processes and additive manufacturing of engine ready parts c) SLM material considerations and properties validation d) Installation and validation in a heavy duty GT Additive Manufacturing (AM) of hot gas path components differs significantly from known process chains. All elements of this novel manufacturing route had to be established and validated. This starts with the selection of the powder alloy used for the SLM production and the determination of essential static and cyclic material properties. SLM specific design features and built-in functionality allow to simplify part assembly and to shortcut manufacturing steps. In addition, the post-SLM machining steps for engine ready parts will be described. As SLM is a novel manufacturing route, complementary quality tools are required to ensure part integrity. Powerful nondestructive methods, like 3D scanning and X-ray computer tomography have been used for that purpose. GE’s engine validation of SLM made parts in a heavy duty GT was done with selected hot gas path components in a rainbow arrangement including turbine blades with SLM tip caps. Although SLM has major differences to conventional manufacturing the various challenges from design to engine ready parts have been successfully mastered. This has been confirmed after the completion of the test campaign in 2015. All disassembled SLM components were found in excellent condition. Subsequent assessments of the SLM parts including metallurgical investigations have confirmed the good part condition.

scholarly journals New process chains involving additive manufacturing and metal forming – a chance for saving energy?

2017 ◽  
Vol 207 ◽  
pp. 1176-1181 ◽  
Author(s):  
Margarita D. Bambach ◽  
Markus Bambach ◽  
Alexander Sviridov ◽  
Sabine Weiss
Keyword(s):  
Additive Manufacturing ◽  
Metal Forming ◽  
Saving Energy ◽  
Process Chains ◽  
New Process

scholarly journals Investigating Components Affecting the Resource Efficiency of Incorporating Metal Additive Manufacturing in Process Chains

2017 ◽  
Vol 8 ◽  
pp. 52-58 ◽  
Author(s):  
Richard Girdwood ◽  
Martin Bezuidenhout ◽  
Philip Hugo ◽  
Pieter Conradie ◽  
Gert Oosthuizen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Resource Efficiency ◽  
Metal Additive Manufacturing ◽  
Process Chains ◽  
Metal Additive

scholarly journals An Overview of Laser Engineered Net Shaping of Ceramics

2020 ◽  
Vol 25 (1) ◽  
Author(s):  
Italo Leite de Camargo ◽  
João Fiore Parreira Lovo ◽  
Rogério Erbereli ◽  
Reginaldo Teixeira Coelho ◽  
Iris Bento da Silva ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Ceramic Coating ◽  
Raw Materials ◽  
Functionally Graded ◽  
Laser Engineered Net Shaping ◽  
Composites Materials ◽  
Low Wear ◽  
Net Shaping ◽  
Ceramic Reinforcement ◽  
Process Material

ABSTRACT Additive manufacturing (AM) has provided huge versatility in geometry and materials, allowing new products and processes in several areas to be created. Laser Engineered Net Shaping (LENS) is an additive manufacturing process created in 1995 that allows building high-density metals and ceramics parts with no need for further operation. This manuscript aims to study the scientific literature about the process of Laser Engineered Net Shaping related to ceramics. After a systematic review, the articles were grouped into three categories: ceramic coating and AM of ceramics and AM of composites with ceramic reinforcement. Raw materials, substrates, applications, process parameters, and the obtained properties were analyzed and summarized for each group. Most of the additive manufacturing of ceramic parts are related to alumina, which present similar properties when compared to the traditionally manufactured ones. Recent works have the aid of an ultrasonic vibration to homogenize the in-process material, reduce cracks and improve mechanical properties. The additive manufacturing of composites with ceramic reinforcement has been used to create functionally graded composites materials with increased hardness, while the ceramic coating has been employed to manufacture biocompatible coating with increased hardness and low wear rate. Moreover, an additive manufacturing timeline including Laser Engineered Net Shaping landmarks is presented.

Nachbearbeitung additiv gefertigter Fräswerkzeuge/Exploiting the full potential by developing seamless process chains

2021 ◽  
Vol 111 (11-12) ◽  
pp. 818-823
Author(s):  
Tobias Kelliger ◽  
Christoph Zachert ◽  
Daniel Schraknepper ◽  
Thomas Bergs
Keyword(s):  
Additive Manufacturing ◽  
Cutting Tools ◽  
Design Guidelines ◽  
Full Potential ◽  
Process Chain ◽  
Post Processing ◽  
Additive Fertigung ◽  
Process Chains ◽  
Individual Design ◽  
Design And Production

Durch additive Fertigung können Zerspanwerkzeuge beanspruchungsgerecht und individuell designt und gefertigt werden. Um das volle ökonomische und ökologische Potenzial dieser Werkzeuge auszuschöpfen, ist eine übergreifende Prozesskettenbetrachtung von der Konstruktion über die Fertigung bis zur spanenden Nachbearbeitung nötig. Dabei müssen übergreifende Lösungen und Gestaltungsrichtlinien entwickelt werden.   Additive manufacturing enables an individual design and production of cutting tools that fulfills the requirements. However, the full economic and ecological potential can only be exploited by considering the entire process chain from design and production to post-processing. General solutions and design guidelines have to be developed.

scholarly journals Hybrid subtractive–additive manufacturing processes for high value-added metal components

2020 ◽  
Vol 111 (3-4) ◽  
pp. 645-655
Author(s):  
Panagiotis Stavropoulos ◽  
Harry Bikas ◽  
Oliver Avram ◽  
Anna Valente ◽  
George Chryssolouris
Keyword(s):  
Additive Manufacturing ◽  
Value Added ◽  
Hybrid Process ◽  
Process Window ◽  
Manufacturing Processes ◽  
Advanced Manufacturing ◽  
Optimal Process ◽  
Structured Decision Making ◽  
Process Chains ◽  
Part Inspection

Abstract Hybrid process chains lack structured decision-making tools to support advanced manufacturing strategies, consisting of a simulation-enhanced sequencing and planning of additive and subtractive processes. The paper sets out a method aiming at identifying an optimal process window for additive manufacturing, while considering its integration with conventional technologies, starting from part inspection as a built-in functionality, quantifying geometrical and dimensional part deviations, and triggering an effective hybrid process recipe. The method is demonstrated on a hybrid manufacturing scenario, by dynamically sequencing laser deposition (DLM) and subtraction (milling), triggered by intermediate inspection steps to ensure consistent growth of a part.

Direct Laser Additive Manufacturing of Ceramics by Powder Deposition

2018 ◽  
Vol 941 ◽  
pp. 2178-2183 ◽  
Author(s):  
Julie Odinot ◽  
Aurélie Julian-Jankowiak ◽  
Johan Petit ◽  
Damien Choron ◽  
Didier Boisselier ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Thermal Environment ◽  
Ternary Eutectic ◽  
Laser Additive Manufacturing ◽  
Laser Powder Deposition ◽  
Direct Laser ◽  
Powder Deposition ◽  
Powder Flowability ◽  
Gradient Control ◽  
Material Interaction

In this study, LMD-CLAD® process (Direct Laser Additive manufacturing) is developed for alumina and Al2O3-Y2O3-ZrO2ternary eutectic compositions. Powder flowability, laser-material interaction and thermal gradient control have been investigated. Powder granules of aforementioned compositions have been designed by spray-drying. Particle size distribution, Hall funnel test and SEM observations have been performed. Flowability has been improved by 20% in order to match with the LMD-CLAD® process by adjusting their density, size and surface quality. Otherwise, optical absorption of the ceramics has been increased up to 90% thanks to the addition of doping ions. With such a flowability improvement, laser powder deposition tests were successful and enabled us to investigate the effect of laser parameters and thermal environment on deposited beads state.

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