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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: 30 November 2023
Fig. 10.19 X-ray showing porosity in an aluminum wheel. Reprinted with permission from Ref 6 More
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Published: 30 June 2023
Fig. 10.26 Porosity in a weld caused by moisture 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 June 2008
Fig. 7.14 Porosity in cast metals. Source: Ref 8 More
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Published: 01 November 2007
Fig. 15.7 Trapped liquid forms a cavity porosity 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 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 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 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 December 2001
Fig. 15 Ultimate tensile strength versus hydrogen porosity for sand-cast bars of three aluminum alloys 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 June 2022
Figure 17 Effects of smearing on perceived porosity. (a) Smeared thermally sprayed specimen after 9 μm diamond polishing. (b) The same specimen with smearing removed by 10 minutes of 3 μm diamond polishing. More
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Published: 01 July 1997
Fig. 1 Types of gas porosity commonly found in weld metal. (a) Uniformly scattered porosity. (b) Cluster porosity. (c) Linear porosity. (d) Elongated porosity More
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Published: 01 July 1997
Fig. 2 Wormhole porosity in a weld bead. Longitudinal cut. 20x More
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Published: 01 July 1997
Fig. 4 Coarse grains in HAZ. 65x. (a) Powder metallurgy tungsten; porosity shown along fusion line. (b) CVD tungsten More