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porosity

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
... Abstract Porosity in aluminum is caused by the precipitation of hydrogen from liquid solution or by shrinkage during solidification, and more usually by a combination of these effects. Nonmetallic inclusions entrained before solidification influence porosity formation and mechanical properties...
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Published: 01 August 2018
Fig. 8.32 Porosity in cast eutectoid steel. The shape of porosity in castings is very similar to the shape of the interdendritic spaces. Optical micrograph. 2% nital etching (porosity is visible without etching). More
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Published: 01 September 2008
Fig. 12 Internal porosity formed from the surface More
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Published: 01 September 2008
Fig. 32 Representative view of the crack propagating from porosity or voids within the brazed joint. Unetched. Original magnification: 100× More
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Published: 01 August 2013
Fig. 8.1 Decrease of fracture strength with porosity. From data concerning stainless steel, iron, and plaster of paris. Source: Adapted from Ref 8.1 More
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Published: 01 June 2016
Fig. 5.2 (a) Optical micrographs depicting variation in porosity with processing parameters for a Ti-64 coating on a SS304 substrate. (b, c) Variation of porosity with thickness and gas pressure as measured from the optical micrograph. Source: Ref 5.10 More
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Published: 01 August 2018
Fig. 8.30 Interdendritic porosity (microporosity) in a steel casting containing 0.28% C, quenched and tempered. The shape of porosity in castings is very similar to the shape of the interdendritic spaces. Optical micrograph. 2% nital etching (porosity is visible without etching). More
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Published: 01 August 2018
Fig. 8.31 Severe porosity in a steel casting. Optical micrograph. No etching. More
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Published: 01 January 2015
Fig. 9.15 Rounded tips of dendritic crystal branches exposed at shrinkage porosity in the equiaxed solidification zone of an as-cast billet of 4140 steel. SEM micrograph. Courtesy of E.J. Schultz. Source: Ref 9.47 More
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Published: 01 January 2015
Fig. 9.16 Another view of dendrite branch tips at shrinkage porosity in equiaxed solidification zone of an as-cast 4140 steel billet. SEM micrograph. Source: Ref 9.47 More
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Published: 01 November 2007
Fig. 15.7 Trapped liquid forms a cavity porosity More
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Published: 30 April 2020
Fig. 10.14 Data for the sintered porosity and delta ferrite content in heat treated 17-4 PH after sintering for 60 min at various hold temperatures in hydrogen. The results include gas- and water-atomized powders. Source: Blaine et al. ( Ref 8 , 9 , 10 ) More
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Published: 30 April 2020
Fig. 10.16 Grain size versus the inverse square root of the fractional porosity (1/(1 – f ) ½ ) for a variety of sintering conditions. The starting grain size is 7.6 μm. More
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Published: 30 April 2020
Fig. 10.41 Comparative grain size plots versus inverse square root of porosity for 0.22 μm alumina sintered at 1620 °C (2950 °F) with no additive as compared with the same powder with added iron oxide or magnesium oxide More
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Published: 01 April 2013
Fig. 8 Digital radiography image of a die cast aluminum carburetor. Porosity appears as dark spots in the area of the center bore, through the vertical center of the image. Courtesy of B.G. Isaacson, Bio-Imaging Research, Inc. More
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Published: 01 April 2013
Fig. 1 Type of gas porosity commonly found in weld metal. (a) Uniformly scattered porosity. (b) Cluster porosity. (c) Linear porosity. (d) Elongated porosity. Source: Ref 1 More
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Published: 01 April 2013
Fig. 2 Wormhole porosity in a weld bead. Longitudinal cut. 20×. Source: Ref 1 More
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Published: 01 September 2008
Fig. 2 Wormhole or piping porosity in weld metal deposited by submerged arc welding. Plate is 19 mm thick. More
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Published: 01 November 2012
Fig. 33 Various forms of voids and porosity. Source: Ref 7 More
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Published: 01 November 2012
Fig. 34 Effect of porosity on interlaminar shear strength of carbon/epoxy. Source: Ref 18 More