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density measurement

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720393
EISBN: 978-1-62708-305-8
... Abstract Fabricated powder metallurgy (P/M) parts are evaluated and tested at several stages during manufacturing for part acceptance and process control. The various types of tests included are dimensional evaluation, density measurements, hardness testing, mechanical testing...
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Published: 30 April 2020
Fig. 2.7 Three simple tests for measuring apparent density. (a) Hall device based on funnel filling a cup, using 50 g of powder. The Hall device is modified with a larger-diameter funnel for poorly flowing powders, called the Carney funnel. (b) Arnold device based on sweeping a bushing filled More
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Published: 01 September 2008
Fig. 2 Effect of density on the case depth as measured through a hardness traverse from the surface. Courtesy of P. Beiss, University of Aachen, Germany More
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Published: 01 December 1996
Fig. 2-1 (a) Density versus temperature (measured values and chosen function given by lines and equations) for pure iron. The sources of the experimental data are cited in the reference. (b) Length changes (relation to 20°C) versus temperature for pure iron derived from the information More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
...) to large, continuous twin-screw compounding stations (1000 kg, or 2200 lb, per day). Feedstock quality testing starts with density and viscosity checks. For dry mixing of powders with binders, thermal effusivity can be used as a measure of proper mixing. Homogeneity is an important attribute that helps...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130395
EISBN: 978-1-62708-284-6
... of producing iron powders for structural parts. The powder thus produced should be favorable for compaction such that: It fills the die cavity repeatably, which is measured in terms of the apparent density and flow rate of the powder. It can be compressed to the desired density with the lowest...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
... reaction Powders are fabricated to meet requirements of composition, particle size, particle shape, and interparticle friction. Ways to identify a powder include size distribution and packing density as measured using standardized tests. Powder production is done through several approaches. The main...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... in an electrolytic solution. It describes how corrosion potentials and current densities are measured and explains how to deal with various sources of error. It also explains how electrochemical impedance measurements are used and describes the underlying theory and procedures in some detail. corrosion rate...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290169
EISBN: 978-1-62708-319-5
... by a discussion on the tools used for measuring bulk properties to monitor sintering and density. The effects of key parameters, such as particle size, oxygen content, sintering atmosphere, and peak temperature, on the sintered properties are discussed. Further, the chapter covers sintering cycles and sintering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220403
EISBN: 978-1-62708-259-4
... Abstract With cold work, mechanical strength (measured either by yield strength or ultimate tensile strength) increases and ductility (measured by elongation, reduction of area, or fracture toughness) normally decreases. This chapter discusses the mechanisms that produce these changes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940127
EISBN: 978-1-62708-302-7
.... This condition allows location of anodic and cathodic sites on the metal surface and, therefore, measurement of the distribution of corrosion. The kinetics of single electrode reactions are discussed in Chapter 3 in which it is demonstrated that the kinetics are governed by the exchange current density...
Book Chapter

By J. W. Ekin
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860465
EISBN: 978-1-62708-348-5
... temperature, critical magnetic field, critical current density, stability, ac loss, and mechanical characteristics; for each property, typical data are provided and the experimental methods used to measure it are briefly described. The properties of the superconducting composites are tied together...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... as a function of current density or charge transfer in a given area. The chapter explains how to measure and plot electrode potentials and currents and how to interpret the resulting polarization curves. It also discusses the effects of concentration gradients, explaining how they cause diffusion and, in some...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... Abstract The physical properties of a material are those properties that can be measured or characterized without the application of force and without changing material identity. This chapter discusses in detail the common physical properties of metals, namely density, electrical properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030147
EISBN: 978-1-62708-349-2
..., and voids that occur in honeycomb core composites. The final section of the chapter discusses void documentation through the use of nondestructive inspection techniques and density/specific gravity measurement methods. References References 1. Tang J.M. , Lee I.W. , and Springer G.S...
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Published: 30 April 2020
Fig. 5.11 Pycnometer density relies on an ideal gas such as helium to infiltrate the pores to measure the true volume. Mass and volume are employed to calculate the density. A combination of known volumes and measured pressures gives the sample volume. More
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Published: 30 April 2020
Fig. 5.10 Conceptual outline of how water immersion is used to measure feedstock density. A sequence of dry and wet mass determinations is used to measure the sample volume, and the sample mass divided by that volume gives the feedstock density. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000223
EISBN: 978-1-62708-312-6
...- repeated compacting, sizing, or coining. See mingling of powder fractions of the same press. nominal composition to adjust physical characteristics. average density. The density measured on an entire body or on a major number of its parts blistering. The formation of surface bubbles on whose measurements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940183
EISBN: 978-1-62708-302-7
... behavior Pourbaix diagrams Anodic Polarization Resulting in Passivity When anodic polarization measurements are extended to progressively higher potentials, several potential versus current-density relationships may result depending upon the electrode material and the aqueous environment...
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
... as a furnace lining, hardware, or setter support for sintering. angle of repose. The angle from the horizontal plane that a pile of loose powder will assume when freely poured through an ori ce, providing a measure of the interparticle friction and ease of shape retention during debinding. apparent density...