1-20 of 146 Search Results for

feedstock density

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006141
EISBN: 978-1-62708-175-7
... will be made from. Various considerations come into play and include (but are not limited to) the question of availability of suitable powders, experience of the company in converting the powder into the desired feedstock, and then processing the material to near full density. Assuming all the considerations...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005503
EISBN: 978-1-62708-197-9
... + η γ ˙ 2 where ρ is the molten PIM feedstock density, C p is the molten PIM feedstock specific heat, and: γ ˙ = ( ∂ / ∂ z ) 2 + ( ∂ v / ∂ z ) 2 is the generalized shear rate, and k is the thermal conductivity of the feedstock...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006555
EISBN: 978-1-62708-290-7
.... Fig. 9 Schematic of material jetting A second embodiment involves melting a polymer and atomizing it to create a fine particle stream for jetting. Feedstocks include polypropylene (PP), high-density polyethylene, polystyrene (conventional and high impact), poly(methyl methacrylate...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006543
EISBN: 978-1-62708-290-7
... is the ability to nest parts in a single build easily, which increases part-packing density; parts also build faster without supports. Polymer PBF feedstock is generally certain types of semicrystalline polymers, with the most popular being polyamide (nylon), with or without composite additions such as flame...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005713
EISBN: 978-1-62708-171-9
... processes. It provides information on feedstock materials developed for specific thermal spray processes. powder production thermal barrier coatings thermal spray coating THE EARLIEST RECORDS of thermal spray originate in the patents of M.U. Schoop (Zurich, Switzerland), dating from 1882...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006571
EISBN: 978-1-62708-290-7
... apply to BJAM. For example, the quality of the green part, and consequently the densified part, is strongly influenced by powder feedstock flowability. Powder with low flowability usually results in lower green part density with more irregular porosity, which translates into a higher likelihood...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006021
EISBN: 978-1-62708-175-7
...Abstract Abstract This article discusses the process details of metal powder injection molding of microcomponents and the powder particle characteristics of feedstock and property requirements of binders. It reviews important characteristics to be considered in the processing steps: venting...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003013
EISBN: 978-1-62708-200-6
... terephthalate (PET), which accounts for the largest percentage of plastic recycling, high-density polyethylene (HDPE) plastics, the other large-volume plastic recyclate, as well as vinyl resins and polycarbonate resins are described. The life cycle of plastics has four phases: poly formation, part fabrication...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005204
EISBN: 978-1-62708-187-0
... ingots low energy consumption; economical melting Limited refining; expensive feedstock preparation; only round ingots Economical feedstock preparation; refining of high-density inclusions; melting of slabs, ingots, and rods; high production rate; low energy consumption Alloying limited; material...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003790
EISBN: 978-1-62708-177-1
... the macroscopic examination of defects, which occur in semisolid metalworking with illustrations. It discusses the macroscopic examination of gating systems and semisolid feedstocks. The article also provides information on feedstock microstructures, direct semisolid metalworking component microstructures...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006562
EISBN: 978-1-62708-290-7
... photopolymerization process ( Ref 59 ). Less than 100% relative density is likely due to defects such as pores caused by the inhomogeneity of feedstock and inaccuracy of material dispensing inherent in AM processes ( Ref 123 ). Another reason could be their lower green density compared with that for conventional...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006549
EISBN: 978-1-62708-290-7
.... H dep , deposit height; H layer , layer height; D sub , penetration depth into substrate; W dep , deposit width Parameters that define energy density together with mass feed rate ( M ) of the feedstock (in grams per second) directly influence the amount and geometry of the material...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005611
EISBN: 978-1-62708-174-0
... There are two main classes of EB deposition processes currently in use for near-net shape fabrication of three-dimensional (3-D) parts. These classes are based on the type of feedstock used and how it is delivered to the molten pool. One class uses a wire-feed-based feedstock method, and the other uses a powder...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006583
EISBN: 978-1-62708-290-7
... microstructures but very poor surface finish + - - - Very early development The powder-based methods require the use of powders that are free flowable with high packing density. Most powders used are spherical. The feedstock-based methods, on the other hand, can work with nonspherical powders. From...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005727
EISBN: 978-1-62708-171-9
... strength generally correlate well with coating density. It is therefore essential that the TS applicator appreciate that feedstock materials are not designated solely by their chemistry and particle size. It is critical to indicate that substitution of one powder for another (because of cost, availability...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006465
EISBN: 978-1-62708-190-0
.... These defects are generally avoided by using high-quality, well-characterized feedstocks and energy densities achieved by establishing processing windows for a particular machine and material combination that produces the desired performance results. Anomalous Microstructural Zones Most AM processes...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006053
EISBN: 978-1-62708-175-7
... to oxygen, vacuum should be applied when sigma mixing for long times. Sintering shrinkage is determined by the green density of the mixed feedstock, not the pressure applied in the molding operation. Therefore, an accurate measurement of the green density is required. This is best achieved using helium...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... and packing density, which, in turn, govern the quality of the build. Improper flow or spreading can lead to defects such as streaking, varying layer thickness that can cause porosity, and other build defects. Flowability and spreadability are affected by the characteristics of the powder feedstock...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006055
EISBN: 978-1-62708-175-7
... production. For example, the price for tooling orthodontic dental components can be much higher than for larger parts, because creating extremely small details requires sophisticated machining and a great deal of skill. Many MIM manufacturers use a hot runner system, which helps prevent MIM feedstock from...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006579
EISBN: 978-1-62708-290-7
... and composition of the feedstock powder. Post-HIP microstructures exhibit an equiaxed structure, minimal grain growth, and the presence of annealing twins. Density and purity are limited by impurities originating from both the feedstock powder used and the residual ash products associated with binder burnout...