1-20 of 479 Search Results for

solidification shrinkage

Sort by
Image
Published: 01 December 2008
Fig. 2 Schematic of sequence of solidification shrinkage in an iron cube. (a) Initial liquid metal. (b) Solid skin and formation of shrinkage void. (c) Internal shrinkage. (d) Internal shrinkage plus dishing. (e) Surface puncture More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006326
EISBN: 978-1-62708-179-5
... describes the solidification shrinkage associated with the volume change that occurs during solidification, as well as strength and stiffness of ductile iron castings. It concludes with a discussion on the thermal deformation and residual stress in ductile iron castings. castability castings design...
Image
Published: 01 January 1990
Fig. 12 Effect of gating system on formation of shrinkage cavities. Solidification starts at the chill and progresses toward the riser. In (a), molten metal can easily feed from the riser into the entire length of the casting. In (b), the narrow portion of the casting can freeze shut before More
Image
Published: 01 December 2008
Fig. 12 (a) Porosity caused by interdendritic shrinkage during the solidification of a cast 4340 steel. The post-HIP microstructure of this component, shown in (b), provides evidence that HIP eliminated the microporosity. These two micrographs also show the potential for HIP to alter More
Image
Published: 30 August 2021
Fig. 1 Valve-spring failure due to residual shrinkage during solidification. (a) Macrograph showing fracture, as indicated by arrow. (b) Fracture surface; pipe is indicated by arrow. Source: Ref 4 More
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
..., external pressure, and cooling conditions. alloy composition gas porosity shrinkage porosity solidification porosity formation IN METAL CASTINGS, two types of porosity are identified: shrinkage porosity and gas porosity. Shrinkage porosity occurs when the shrinkage on solidification cannot...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009016
EISBN: 978-1-62708-187-0
... superheat and cools to its solidification temperature. Solidification shrinkage: The metal freezes, changing from a liquid to a higher-density solid. For pure metals, this contraction will occur at a single temperature, but for noneutectic alloys, it will take place over some temperature range...
Image
Published: 01 December 2008
Fig. 1 Schematic of the shrinkage of low-carbon steel. The contribution of each one of the three distinct stages of volume contraction is shown: liquid shrinkage, solidification shrinkage, and solid contraction. Source: Ref 1 More
Image
Published: 01 December 2004
Fig. 2 Casting defects in a Mg-Al-Ca-Sr alloy die cast computer housing. Defects are associated with solidification. (a) Hot cracking (tearing). (b) Sink associated with solidification shrinkage. Courtesy of B.R. Powell, General Motors Corporation More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009014
EISBN: 978-1-62708-187-0
... in the bottom portion of the mold, coarser detail in the upper portions of the mold, more taper leading to thin sections, and so forth. Solidification Shrinkage Shrinkage occurs in three distinct stages: liquid shrinkage, liquid-to-solid shrinkage, and solid shrinkage. Liquid shrinkage...
Image
Published: 01 December 2004
Fig. 25 As-polished section of AZ31 direct chill cast billet showing solidification shrinkage. Courtesy of F. Pravdic, ARC Leichtmetallkompetenzzentrum Ranshofen More
Image
Published: 01 December 2004
Fig. 11 Microstructures of (a) AM60 and (b) AZ91D high-pressure die cast specimens after etching with acetic-glycol. The matrix appears light, with the eutectic phase slightly darker. The large black areas (arrows) are microporosity due to entrapped gas and solidification shrinkage. Courtesy More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005223
EISBN: 978-1-62708-187-0
... deformations caused by the nonuniform cooling contraction of the casting and inadequate interdendritic melt feeding of the solidification shrinkage. More specifically, at the later stages of solidification, the dendritic network grows to an extent whereby it has sufficient strength to transmit thermal...
Image
Published: 01 December 2004
Fig. 12 Microstructures of (a) AM60 and (b) AZ91D high-pressure die cast specimens after etching with acetic-picral. The matrix appears light, with the eutectic phase slightly darker. Areas of interdendritic microporosity due to solidification shrinkage are indicated with arrows. The large More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005216
EISBN: 978-1-62708-187-0
... of parameters. There are numerous causes of liquid flow and solid movement in casting processes: Flow that feeds the solidification shrinkage and the contractions of the liquid and solid during cooling Buoyancy-induced flows due to thermal and solutal gradients in the liquid. The thermal...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006496
EISBN: 978-1-62708-207-5
... of a number of important alloys. It concludes with a discussion on castability of 2xx, 3xx, 4xx, 5xx, and 7xx alloys. castability microsegregation macrosegregation freezing solidification solidification shrinkage foundry aluminum alloys CASTABILITY is a complex characteristic that depends...
Image
Published: 01 December 2008
Fig. 18 The function of risers. (a) Shrinkage in casting at last portion to solidify without a riser. (b) Shrinkage in riser allows the production of a sound casting. More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005272
EISBN: 978-1-62708-187-0
... Time The reduced energy release also affects solidification time, typically reducing it by nearly 50%. Reduced Solidification Shrinkage Injecting a slurry with 50% fraction solid into a die cavity means that 50% solidification shrinkage associated with the primary phase has already taken...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009020
EISBN: 978-1-62708-187-0
... manners of manufacturing as possible conversion candidates for casting. It concludes with a discussion on different metalcasting design projects. casting metal shrinkage solidification shrinkage casting tolerances flexibility economical coring core design metal casting design fabrication...
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
... consumption and hence environmental concerns ( Ref 26 ). Extensive experimental studies on pore formation in a range of alloys have led to ever more complex models that simulate both the diffusion of gaseous elements and the feeding of solidification shrinkage in both simplified and commercial alloys ( Ref 14...