1-20 of 477 Search Results for

shrinkage porosity

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
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005222
EISBN: 978-1-62708-187-0
...Abstract Abstract This article provides a detailed discussion on the causes of formation of shrinkage porosity and gas porosity along with the methods involved in eliminating them. It discusses the process of porosity formation and the factors affecting porosity formation, including alloy...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006327
EISBN: 978-1-62708-179-5
... inclusions. Source: Ref 22 . (d) Clusters of graphite nodules. Source: Ref 22 . (e) Shrinkage porosity. Source: Ref 22 . (f) Eutectic chills. Source: Ref 22 . (g) Intergranular carbides. Source: Ref 13 . (h) Cold shuts Fig. 8 Graphite alignment. (a) Optical micrograph. (b) Scanning electron...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005343
EISBN: 978-1-62708-187-0
... of the final fracture region Presence of nonmetallic inclusions, shrinkage, or gas porosity or any other anomalies at or near the fracture origin Damage and wear to the surface of the part, both near to and away from the failure Dents, scuff marks, and collateral damage to the casting Presence...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000620
EISBN: 978-1-62708-181-8
... cast aluminum alloys connecting rods fatigue striations fractograph shrinkage cavities shrinkage porosity Fig. 921 A portion of a fractured carrier tray and sand cast of an aluminum alloy intended to be 356.0-T6. Chemical analysis revealed that the copper and zinc contents were of an order...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005277
EISBN: 978-1-62708-187-0
... that are made in which velocities everywhere in the mold never exceed the critical velocity are consistently strong, with high fatigue resistance, and are leaktight (if properly fed so as to be free from shrinkage porosity). Experiments on the casting of aluminum have demonstrated that the strength...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009023
EISBN: 978-1-62708-187-0
..., and all were rejected for shrinkage porosity at the top of the hub. This condition was attributed to localized heating of the mold by the molten metal entering at the riser-sprue and flowing directly downward as the mold was filled. A feed pad 1 16 in thick by 1 2 in. wide...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005293
EISBN: 978-1-62708-187-0
... for most metal castings, while higher pressures are used in special applications, such as processing creep-resistant alloys. Figure 1 illustrates the effect of HIP on an A356-T6 aluminum alloy casting. Shrinkage porosity and possible gas porosity are observed in the casting that went through a T6 heat...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... B 310: Cavities according to B 300, scarcely perceptible to the naked eye B 311 (a) Dispersed, spongy dendritic shrinkage within walls of casting; barely perceptible to the naked eye Macro- or micro- shrinkage, shrinkage porosity, leakers Discontinuities C 100...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... categories of imperfections and have developed charts and standards for classification and acceptability. Some examples are ISO 6157, BPS-F-69, SAE 123, NAS 496, and ASTM F 788. Gas Porosity Shrinkage Porosity or Cavity Alloy Segregation High-Density Inclusion Voids Caused by Hydrogen Folds...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009022
EISBN: 978-1-62708-187-0
... fitting was producible only at a 16% rejection rate, because of shrinkage porosity due to insufficient feeding. Redesign, in which walls were increased at the flanged end and tapered, permitted more successful production; the rejection rate dropped to 6%. Dimensions in inches Fig. 4 Adding...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006508
EISBN: 978-1-62708-207-5
... “Casting Quality” in this article). A number of factors can aggravate the level of porosity in lost foam castings, and full understanding of process variables is critical in achieving the benefits of lost foam. Many designs of lost foam castings have been subject to sporadic outbreaks of shrinkage...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.9781627082075
EISBN: 978-1-62708-207-5
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
.... The article discusses the types of imperfections that can be traced to the original ingot product. These include chemical segregation; ingot pipe, porosity, and centerline shrinkage; high hydrogen content; nonmetallic inclusions; unmelted electrodes and shelf; and cracks, laminations, seams, pits, blisters...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005344
EISBN: 978-1-62708-187-0
.... This article presents some of the common defects in each of the seven categories. It also discusses select case studies relevant to inclusions, cavities (gas porosity, shrinkage), and discontinuities (hot tearing, cold shut). casting defects gas porosity hot tearing inclusions metallic projections...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
..., zone formation in final structure of the casting, and microporosity formation during shrinkage. This article describes the imperfections in the solidification process including porosity, inclusions, oxide films, secondary phases, hot tears, and metal penetration. It talks about the purpose...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005420
EISBN: 978-1-62708-196-2
... Abstract Abstract This article focuses on the concepts involved in heat-transfer modeling, thermomechanical modeling, and microsegregation modeling of hot tearing. It discusses the modeling of solidification defects, namely, inclusion entrapment, segregation, shrinkage cavities, gas porosity, mold-wall...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001754
EISBN: 978-1-62708-178-8
... grains is the chill zone. During casting, such macrostructural defects as gas or shrinkage porosity and center cracks can develop. Many of these defects can be characterized using macrostructural evaluation. Figure 6(a) shows spider cracks in the center of a copper specimen. This specimen...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009024
EISBN: 978-1-62708-187-0
... for a steel casting, junctions should still be fed adequately if shrinkage cavities and porosity are to be avoided. As an example, the problems encountered in producing the aluminum alloy sand casting, a primary flight-control-mechanism support, shown in Fig. 11 were concerned with the junctions...
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.9781627081870
EISBN: 978-1-62708-187-0
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005520
EISBN: 978-1-62708-197-9
... Initial condition P Pore s Solid state S Shrinkage V Vapor Governing Mechanisms Porosity Model Types Conclusions References References 1. Flemings M.C. , Solidification Processing , McGraw-Hill, Inc. , New York , 1974 2. Campbell J. , Castings...