scholarly journals New Processes and Machine Tools for Advanced Metal Alloys

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 225
Author(s):  
Luis Norberto López de Lacalle ◽  
Ainhoa Celaya
Keyword(s):  
Machine Tools ◽  
Metal Alloys ◽  
Advanced Materials ◽  
Industrial Sectors

Advanced materials are crucial for the development of many industrial sectors such as aerospace, automotive, energy, among others [...]

Low Environmental Impact Machining Processes of Composite Materials Applied to the Aerospace Sector

2010 ◽  
Vol 107 ◽  
pp. 15-19 ◽  
Author(s):  
Miguel Álvarez ◽  
Moisés Batista ◽  
Jorge Salguero ◽  
Manuel Sánchez-Carrilero ◽  
Mariano Marcos Bárcena
Keyword(s):  
Evaluation Process ◽  
Advanced Materials ◽  
Surface Finishing ◽  
Matrix Composites ◽  
Machining Processes ◽  
Tool Materials ◽  
Industrial Sectors ◽  
Aerospace Sector ◽  
Aeronautical Industry

In the last decades, technologically innovative processes performed in advanced materials such as Carbon Fibre (CF) and Metal Matrix Composites (MMC) have continuously increased because of these materials find increasingly applications in the most of the industrial sectors, particularly in aeronautical industry. This is caused by their excellent relationship weight/mechanical properties. Although there is a high trend to apply and develop non-conventional technologies and methods for machining CF and MMC, other common machining processes are commonly applied for working these materials. Thus, in aeronautical industry, mechanical drilling processes are usually applied for preparing the manufactured elements to be assembled. However, drilling of CF based materials can carry on troubles related to a loss of surface finishing quality and/or quick and high tool wear. This work reports on the results about an evaluation process of the surface quality of drilled CF samples as a function of the cutting conditions and the tool materials.

scholarly journals Asymmetric Suzuki-Miyaura coupling of heterocycles via Rhodium-catalysed allylic arylation of racemates

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Philipp Schäfer ◽  
Thomas Palacin ◽  
Mireia Sidera ◽  
Stephen P. Fletcher
Keyword(s):  
Asymmetric Catalysis ◽  
Anticancer Agent ◽  
Cross Coupling ◽  
Boronic Acids ◽  
Biologically Active ◽  
Advanced Materials ◽  
Industrial Sectors ◽  
Single Isomer ◽  
Carbon Carbon Bonds ◽  
Drug Synthesis

Abstract Using asymmetric catalysis to simultaneously form carbon–carbon bonds and generate single isomer products is strategically important. Suzuki-Miyaura cross-coupling is widely used in the academic and industrial sectors to synthesize drugs, agrochemicals and biologically active and advanced materials. However, widely applicable enantioselective Suzuki-Miyaura variations to provide 3D molecules remain elusive. Here we report a rhodium-catalysed asymmetric Suzuki-Miyaura reaction with important partners including aryls, vinyls, heteroaromatics and heterocycles. The method can be used to couple two heterocyclic species so the highly enantioenriched products have a wide array of cores. We show that pyridine boronic acids are unsuitable, but they can be halogen-modified at the 2-position to undergo reaction, and this halogen can then be removed or used to facilitate further reactions. The method is used to synthesize isoanabasine, preclamol, and niraparib—an anticancer agent in several clinical trials. We anticipate this method will be a useful tool in drug synthesis and discovery.

Engine Testing of Advanced Materials for Hypersonic Applications

2005 ◽  
Author(s):  
Michael J. Bur
Keyword(s):  
Rocket Engine ◽  
Ceramic Composites ◽  
Gaseous Hydrogen ◽  
Metal Alloys ◽  
Advanced Materials ◽  
Metallic Foams ◽  
Combustion Chambers ◽  
Hypersonic Propulsion ◽  
Engine Testing ◽  
Engine Components

This paper describes the use of a ground based gaseous hydrogen/oxygen rocket engine to test advanced materials for rocket engine and hypersonic propulsion applications. The types of materials that have been tested include ceramic composites, metallic alloys and ceramic and metallic foams. There are various configurations in which these materials can be tested. A “square” engine is used for testing flat rectangular panels by placing the panel downstream of the rocket nozzle in the exhaust path. A more traditional “round” rocket engine is used to test axisymmetric engine components such as nozzle inserts and combustion chambers that are fabricated from either ceramic composites or metal alloys. Besides hydrogen, other engine fuels such as methane are being evaluated in order to expose test materials to a hydrocarbon environment. Various organizations from industry, academia and other government agencies have used this test cell to facilitate the development of advanced materials for use in both rocket engine and hypersonic propulsion applications.

Biomimetic Design and Advanced Materials for Innovative Systems

2019 ◽  
Vol 957 ◽  
pp. 445-454
Author(s):  
Sonia Capece ◽  
Mario Buono ◽  
Francesca Cascone ◽  
Janitzio Egido-Villarreal ◽  
Francesco Caputo
Keyword(s):  
Human Error ◽  
Advanced Materials ◽  
Specific Knowledge ◽  
Material Optimization ◽  
Industrial Sectors ◽  
Research Activities ◽  
Form Function ◽  
Critical Issues ◽  
Reliability Assessments ◽  
Definition Of

The contribution collects and illustrates "creative" methodological and design paths in the sectors of mobility and transport where design, biology, material technologies and bioengineering cooperate in a synergistic and proactive way for configurating new systems for fixing vehicles’ interior components. The aim has been to reduce the tolerance of human error during assembly by using innovative technological and material solutions and the conscious study of biological and biomechanical processes present in nature. In order to articulate the research activities, parameters have been identified and defined according to the requirements of the workers during the preparation and fixing of the components, according to the principles of safety, good design and material optimization. From the identification and literature survey of the patent documents and from the structural, material, feasibility and reliability assessments of the current installation procedures, critical issues related to stress, safety, times of installation and assembly and disassembly of the components have been carried out. Therefore, innovative biomimetic concept-solutions have been developed for the definition of architectures and fixing systems through an in-depth observation of the biological heritage, based on the organic integration of form, function, and processes. The path allowed the acquisition of specific knowledge and interdisciplinary skills to plan tangible results useful for optimizing, innovating and strengthening the design process from various industrial sectors such as engineering, aerospace, automotive, medical and pharmaceutical packaging.

Industrial Legacies and Germany’s Specialization in Customization

2021 ◽  
pp. 74-110
Author(s):  
Jonas Nahm
Keyword(s):  
Technological Innovation ◽  
Learning Process ◽  
Machine Tools ◽  
Batch Production ◽  
Industrial Sectors ◽  
Flexible Specialization ◽  
Public Resources ◽  
Institutional Legacies ◽  
Key Resources

This chapter traces how entrants from legacy industries in Germany used public resources originally intended to support technological innovation in traditional sectors such as machine tools and automobile supplies. It explains why, even in new sectors such as wind and solar, German firms reproduced historical patterns of flexible specialization, customization, and small-batch production. The chapter begins with a discussion of industrial origins of Germany’s wind and solar firms, focusing in particular on machine tools, automation, and automotive sectors. It then outlines the learning process that firms navigated in pivoting from their existing industries into new industrial sectors. The second half of the chapter focuses on the two key resources that enabled these developments: collaboration with China and domestic institutional legacies.

Machine Tools Thermostabilization Using Passive Control Strategies

2012 ◽  
Vol 590 ◽  
pp. 252-257 ◽  
Author(s):  
Francesco Aggogeri ◽  
Alberto Borboni ◽  
Angelo Merlo ◽  
Nicola Pellegrini
Keyword(s):  
Thermal Stability ◽  
Phase Change ◽  
Machine Tools ◽  
Phase Change Materials ◽  
Passive Control ◽  
Environmental Temperature ◽  
Control Strategies ◽  
Experimental Tests ◽  
Advanced Materials ◽  
Thermal Stability Of

The aim of this study is to investigate passive control strategies using Phase Change Materials in Machine Tools (MTs) thermostabilization. By considering the main issues related to the thermal stability, authors presented the application of novel multifunctional materials to Machine Tools structures. A set of advanced materials are considered: aluminium foams, corrugate-core sandwich panels and polymeric concrete beds. The adopted solutions have been infiltrated by phase change materials (PCMs) in order to maintain the thermal stability of MTs when the environmental temperature is perturbed. The paper shows the results of simulative and experimental tests.

Special Issue on Process Simulation

2013 ◽  
Vol 7 (1) ◽  
pp. 5-5
Author(s):  
Takashi Matsumura
Keyword(s):  
Process Simulation ◽  
Machine Tools ◽  
High Performance ◽  
Advanced Materials ◽  
Manufacturing Processes ◽  
Special Issue ◽  
Process Simulations ◽  
Investment Returns ◽  
Manufacturing Technologies ◽  
Effective Use

High production rates and low costs in manufacturing process should be considered in the manufacturing design divisions. Process simulation, therefore, plays an important role in implementing high performance manufacturing. Simulation is expected to improve the manufacturing processes and the human activities without production faults and downtime of the manufacturing facilities. The production simulation has become diversified with requirements for the manufacturing processes. Then, the effective use of the simulation is also an important issue for the simulation users considering investment returns. Recently advanced materials have been applied to products with developments in material science. The machining systems have also become complicated with progress in the machine tools. Therefore, the process simulations should be developed in terms of materials and machine tools. This special issue includes 9 papers for providing innovative approaches to advanced modeling and simulations in manufacturing technologies and machine tool systems. The special issue also includes discussions in the simulation with the advanced materials for future manufacturing processes. I thank the authors for their generous cooperation and the editing staff for its many contributions.

Production Aspects Affecting the Final Precision Machining of Advanced Materials

2017 ◽  
Vol 756 ◽  
pp. 155-161
Author(s):  
Tomáš Stejskal ◽  
Miroslav Štofa ◽  
Jozef Svetlík ◽  
Martin Pituk ◽  
Adam Žilinský
Keyword(s):  
Machine Tools ◽  
Dynamic Stiffness ◽  
Construction Materials ◽  
Great Influence ◽  
Advanced Materials ◽  
Static Stiffness ◽  
Positioning Accuracy ◽  
Work Area ◽  
Static Rigidity ◽  
Definition Of

When creating products of modern construction materials has a great influence on their endpoints right way and the quality of working on machine tools. The article deals with positioning accuracy of machine tools which is carried out in an unloaded condition, according to international standard ISO 230-2. Overall accuracy of working machining is determined mainly static rigidity, geometrical accuracy of mechanical components, positioning accuracy and dynamic stiffness. Static stiffness is defined in new machine tools in a limited workspace. Therefore, the article deals with the definition of static stiffness in the expanded work area and also defines its impact on the positioning accuracy at individual points in workspace of the machine tool.

scholarly journals Semisolid Metal Processing Techniques for Nondendritic Feedstock Production

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
M. N. Mohammed ◽  
M. Z. Omar ◽  
M. S. Salleh ◽  
K. S. Alhawari ◽  
P. Kapranos
Keyword(s):  
Metal Alloys ◽  
High Quality ◽  
Microstructural Alterations ◽  
Globular Microstructure ◽  
Industrial Sectors ◽  
Transition Area ◽  
Metal Processing ◽  
Feedstock Production ◽  
Processing Techniques ◽  
Semisolid Metal

Semisolid metal (SSM) processing or thixoforming is widely known as a technology that involves the formation of metal alloys between solidus and liquidus temperatures. For the procedure to operate successfully, the microstructure of the starting material must consist of solid near-globular grains surrounded by a liquid matrix and a wide solidus-to-liquidus transition area. Currently, this process is industrially successful, generating a variety of products with high quality parts in various industrial sectors. Throughout the years since its inception, a number of technologies to produce the appropriate globular microstructure have been developed and applied worldwide. The main aim of this paper is to classify the presently available SSM technologies and present a comprehensive review of the potential mechanisms that lead to microstructural alterations during the preparation of feedstock materials for SSM processing.

scholarly journals Nanocomposite Materials

2020 ◽  
Author(s):  
Mousumi Sen
Keyword(s):  
Food Packaging ◽  
Advanced Materials ◽  
Small Scale ◽  
Individual Property ◽  
Inorganic Solids ◽  
Industrial Sectors ◽  
Automobile Construction ◽  
Electronics And Electrical ◽  
Inorganic Matrix

Nanocomposites are the heterogeneous/hybrid materials that are produced by the mixtures of polymers with inorganic solids (clays to oxides) at the nanometric scale. Their structures are found to be more complicated than that of microcomposites. They are highly influenced by the structure, composition, interfacial interactions, and components of individual property. Most popularly, nanocomposites are prepared by the process within in situ growth and polymerization of biopolymer and inorganic matrix. With the rapid estimated demand of these striking potentially advanced materials, make them very much useful in various industries ranging from small scale to large to very large manufacturing units. With a great deal to mankind with environmental friendly, these offer advanced technologies in addition to the enhanced business opportunities to several industrial sectors like automobile, construction, electronics and electrical, food packaging, and technology transfer.

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