In this study, a composition of cobalt-chromium (Co-Cr) and ten series of cobalt-chromium-nickel (Co-Cr-Ni) alloys were fabricated using powder metallurgy technique. The objectives of the research are: to develop Co-Cr-Ni alloys by powder metallurgy; to correlate physical and mechanical properties such as density, porosity, shrinkage and hardness with composition of Co-Cr-Ni alloys and to understand a relationship of corrosion resistance with composition of Co-Cr-Ni alloy by immersion test.

Powder metallurgy (PM) is a popular metal forming technology used to produce dense and precision components. Different powder and component forming routes can be used to create an end product with specific properties for a particular application or industry. Advances in powder metallurgy explores a range of materials and techniques used for powder metallurgy and the use of this technology across a variety of application areas. Part one discusses the forming and shaping of metal powders and includes chapters on atomisation techniques, electrolysis and plasma synthesis of metallic nanopowders. Part two goes on to highlight specific materials and their properties including advanced powdered steel alloys, porous metals and titanium alloys. Part three reviews the manufacture and densification of PM components and explores joining techniques, process optimisation in powder component manufacturing and non-destructive evaluation of PM parts. Finally, part four focusses on the applications of PM in the automotive industry and the use of PM in the production of cutting tools and biomaterials. Advances in powder metallurgy is a standard reference for structural engineers and component manufacturers in the metal forming industry, professionals working in industries that use PM components and academics with a research interest in the field. Discusses the forming and shaping of metal powders and includes chapters on atomisation techniques Highlights specific materials and their properties including advanced powdered steel alloys, porous metals and titanium alloys Reviews the manufacture and densification of PM components and explores joining techniques

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

High-Entropy Alloys, Second Edition provides a complete review of the current state of the field of high entropy alloys (HEA). Building upon the first edition, this fully updated release includes new theoretical understandings of these materials, highlighting recent developments on modeling and new classes of HEAs, such as Eutectic HEAs and Dual phase HEAs. Due to their unique properties, high entropy alloys have attracted considerable attention from both academics and technologists. This book presents the fundamental knowledge, the spectrum of various alloy systems and their characteristics, key focus areas, and the future scope of the field in terms of research and technological applications. - Provides an up-to-date, comprehensive understanding on the current status of HEAs in terms of theoretical understanding and modeling efforts - Gives a complete idea on alloy design criteria of various classes of HEAs developed so far - Discusses the microstructure property correlations in HEAs in terms of structural and functional properties - Presents a comparison of HEAs with other multicomponent systems, like intermetallics and bulk metallic glasses

The practices of powder metallurgy, in common with many of the technical arts, have grown rapidly in advance of the theory. It remains to examine the details of the process, in a scientific manner, in order to enjoy the satisfaction of deeper understanding and, perhaps, to add some useful refinements of control. Among the details that have not yet been adequately scrutinized is the process of alloying that takes place during the sintering and annealing of the pressed metal powder compacts. The coppernickel alloy series offers a simple case for study inasmuch as no intermediate phases form; the system is isomorphous--a continuous series of solid solutions. Recently the course of homogenization of these alloys was studied; a method for expressing the degree of inhomogeneity in terms of the dimensions of the microstructure and the concentration differences was proposed, and the relationships existing among the rate of homogenization, the microstructural dimensions, and the temperature of annealing were described. In order to apply these concepts to the practical problem of selecting the most favorable annealing conditions, it is necessary to know, as well, something about the relationships existing between the degree of inhomogeneity and the physical and mechanical properties of the material. The present paper presents the findings of a preliminary study of this subject and although a more complete study was interrupted by conditions arising out of the war, the incomplete observations made thus far appear to be of sufficient significance to warrant their publication at this time.

This book presents the select proceedings of the International Conference on Functional Material, Manufacturing and Performances (ICFMMP) 2019. The book primarily covers recent research, theories, and practices relevant to surface engineering and processing of materials. It focuses on the lesser-known technologies and advanced manufacturing methods which may not be standardized yet but are highly beneficial to material and manufacturing industrial engineers. The book includes current advances in the field of coating, deposition, cladding, nanotechnology, surface finishing, precision machining, processing, and emerging advanced manufacturing technologies which enhance the performance of materials in terms of corrosion, wear and fatigue. The book can be a valuable reference for beginners, researchers, and professionals interested in materials processing and allied fields.

Tensile strength, fatigue strength and ductility are important properties of nanostructured metallic materials, which make them suitable for use in applications where strength or strength-to-weight ratios are important. Nanostructured metals and alloys reviews the latest technologies used for production of these materials, as well as recent advances in research into their structure and mechanical properties.One of the most important issues facing nanostructured metals and alloys is how to produce them. Part one describes the different methods used to process bulk nanostructured metals and alloys, including chapters on severe plastic deformation, mechanical alloying and electrodeposition among others. Part two concentrates on the microstructure and properties of nanostructured metals, with chapters studying deformation structures such as twins, microstructure of ferrous alloys by equal channel angular processing, and characteristic structures of nanostructured metals prepared by plastic deformation. In part three, the mechanical properties of nanostructured metals and alloys are discussed, with chapters on such topics as strengthening mechanisms, nanostructured metals based on molecular dynamics computer simulations, and surface deformation. Part four focuses on existing and developing applications of nanostructured metals and alloys, covering topics such as nanostructured steel for automotives, steel sheet and nanostructured coatings by spraying.With its distinguished editor and international team of contributors, Nanostructured metals and alloys is a standard reference for manufacturers of metal components, as well as those with an academic research interest in metals and materials with enhanced properties.