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feedstock microstructure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460185
EISBN: 978-1-62708-285-3
... produced using cryomilled and conventional feedstock. Cryomilling produces nanograined feedstock powder, and cold spraying retains the nanometer-sized grains in the coating microstructure ( Ref 7.46 ). The wear rate of coatings produced using cryomilled feedstock was reported to be lower than...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
... Abstract This chapter includes a comprehensive set of definitions used in powder-binder processing. binder feedstock powders polymers Binder and Polymer Assisted Powder Processing Randall German and Animesh Bose DOI 10.31399.asm.tb.bpapp.t59290261 Copyright # 2020 ASM InternationalW...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040020
EISBN: 978-1-62708-428-4
... spray processes that are based on plasma and HVOF systems. Thus, the use of liquid feedstock in the form of suspensions or solutions enables the production of coatings with unique microstructures such as columnar and segmented structures and ones with highly porous/high specific surface area, and dense...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290001
EISBN: 978-1-62708-319-5
... of feedstock and describing the challenges in component production. The chapter also summarizes alphabetically a few key concepts in powder-binder processing. binders feedstock polymers powder-binder fabrication The idea of working powders into a target shape followed by sintering emerged more...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
... Abstract This chapter provides details on powder-binder processing for three materials, namely precipitation-hardened 17-4 PH stainless steel, cemented carbides, and alumina. The types of powders, binders, feedstock, shaping processes, debinding, sintering cycles, compositions, microstructure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460173
EISBN: 978-1-62708-285-3
..., and causes nozzle clogging and powder-feeding inhomogeneity. On the other hand, a high content of coarse particles also has a negative effect on the DE because the particles are too coarse to be deformed/deposited. Therefore, both fine and coarse particles must be separated from the feedstock powder...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... Abstract The conversion of feedstock into a shape involves the application of heat and pressure, and possibly solvents. This chapter discusses the operating principle, advantages, limitations, and applications of such shaping processes, namely additive manufacturing, cold isostatic pressing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460121
EISBN: 978-1-62708-285-3
... Abstract This chapter elucidates the indispensable role of characterization in the development of cold-sprayed coatings and illustrates some of the common processes used during coatings development. Emphasis is placed on the advanced microstructural characterization techniques that are used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040030
EISBN: 978-1-62708-428-4
... issues, along with causes and mitigation strategies. It describes the processes involved in the interpretation of the thermal spray coating microstructure. electron microscopy metallographic preparation microstructure optical microscopy specimen analysis thermal spraying Introduction...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000039
EISBN: 978-1-62708-312-6
... expensive coarser powders and the feasibility of liquid-phase and supersolidus sintering. 4.2.2 Feedstock In the most common version of MIM, a fine (<20 μm), near-spherical prealloyed metal powder or a mixture of elemental powders are combined with an organic binder, typically a multicomponent...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.tb.atia.t59340063
EISBN: 978-1-62708-427-7
... and DC casting: There are no downstream operations that can eliminate nonmetallic inclusions or change the alloy’s chemical composition. However, the microstructure of a DC ingot will almost always be significantly modified by thermal and wrought processes. Direct Chill Ingot Microstructure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460209
EISBN: 978-1-62708-285-3
... technology that can deposit metals or metal-ceramic composites under atmospheric conditions by accelerating feedstock particles above supersonic (300 to 1200 m/s, or 1000 to 3900 ft/s) speeds using a converge-diverge de Laval nozzle ( Ref 8.1 – 8.8 ). Because the cold spray process can produce thick deposits...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460017
EISBN: 978-1-62708-285-3
... line, a fluidized powder feedstock is fed into the gas stream. The powder is accelerated by the expanding gas and impacts the substrate at high velocities of up to 1200 m/s (4000 ft/s) ( Ref 2.7 , 2.23 – 2.26 ). The gas velocities are determined by the gas type, the gas temperature, and the expansion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.9781627084284
EISBN: 978-1-62708-428-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460253
EISBN: 978-1-62708-285-3
... pressure for copper cold spray. The characterization of microstructures and mechanical properties for copper coatings has shown that bulk-equivalent material can be obtained, provided appropriate spray conditions and postspray heat treatments are employed ( Ref 10.10 – 10.12 ). Initial feasibility work...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120047
EISBN: 978-1-62708-269-3
... are the sources of feedstock in powder making. One of the other important features of P/M processing is the potential for developing unique, nonstandard chemistries that may not be able to be processed by any other techniques. Rapid solidification processing has been investigated for nearly two decades...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.tb.atia.t59340143
EISBN: 978-1-62708-427-7
... during casting and modify the Al-Fe-Si particles present in the alloy. Both microstructural changes are important for surface quality. However, unlike rolling ingots, which are hot rolled quickly after homogenization, the logs are removed from the furnace and immediately cooled rapidly by fans. Figure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... melting, electron beam hearth melting, rammed graphite mold casting, sand casting, investment casting, hot isostatic pressing, weld repair, and heat treatment -- along with related equipment, process challenges, and achievable properties and microstructures. It also explains how titanium parts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... Characteristics As shown in Fig. 1 , SCC in aluminum alloys is characteristically intergranular. According to the electrochemical theory ( Ref 5 – 9 ), this requires a condition along grain boundaries that makes them anodic to the rest of the microstructure so that corrosion propagates selectively along...