1-20 of 597 Search Results for

gas segregation

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: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002122
EISBN: 978-1-62708-188-7
... procedures for producing powder metallurgy high-speed tool steel powder by inert-gas atomization, followed by compaction by hot isostatic pressing. These include the anti-segregation process (ASP) and the crucible particle metallurgy (CPM) process. The article reviews the properties of ASP and CPM...
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
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006495
EISBN: 978-1-62708-207-5
.... The article concludes with information on the applications of highly porous metal structures. aluminum foams gas segregation foaming investment casting mechanical properties powder metallurgy solidification porosity FOAMS AND OTHER HIGHLY POROUS MATERIALS with cellular structure find...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006109
EISBN: 978-1-62708-175-7
... density, and compressibility of metal powders. It explains the mechanisms of powder segregation. The article provides information on green strength and springback value of rectangular test bar. It concludes with a discussion on the chemical composition of metal powders. angle of repose apparent...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
... effect and end effect considerations are accounted for through the use of chills Abstract Abstract Solidification is a comprehensive process of transformation of the melt of metals and alloys into a solid piece, involving formation of dendrites, segregation which involves change in composition...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005295
EISBN: 978-1-62708-187-0
... that promotes moving segregation and shrinkage out of the ingot to the hot top, or head, of the ingot. Some of the highest-quality steels are cast in this design. A big-end-down (BED) design is used to produce solidification structures that can be reduced in rolling for plate and sheet applications...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... for diffusion-related alterations. Grain boundaries are thus the preferential region for congregation and segregation of impurities. Weakening or embrittlement can also occur by preferential phase precipitation or absorption of environmental species in the grain boundaries. In addition, the grain-boundary...
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
...Abstract Abstract This article provides a discussion on ten rules for the effective production of reliable castings. These rules include good-quality melt, liquid front damage, liquid front stop, bubble damage, core blows, shrinkage damage, convection damage, segregation, residual stress...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006075
EISBN: 978-1-62708-175-7
.... Fluidization segregation is also likely to occur when bins are filled/discharged at high rates or if gas counterflow is present. Fluidization often develops in materials that contain a significant percentage of particles below 100 μm in size. Dusting segregation involves airborne particles, differences...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005202
EISBN: 978-1-62708-187-0
.... With the exception of high-vapor-pressure elements, the VIM chemistry is representative of the VAR chemistry. The flotation of oxides and nitrides to the melt surface in VAR improves the cleanliness and reduces the gas content of material processed through VAR. A common factor affecting consumable remelt quality...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001772
EISBN: 978-1-62708-178-8
...Ionization potentials and imaging fields for selected gases Table 2 Ionization potentials and imaging fields for selected gases Gas Ionization potential, eV Best imaging field, V/nm Helium 24.6 45.0 Neon 21.6 37.0 Hydrogen 15.6 22.8 Argon 15.7 23.0 Krypton 14.0...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006544
EISBN: 978-1-62708-290-7
... is being filled, the coarse particles are driven into the bed, while the fine particles remain fluidized near the surface. Fluidization segregation is also likely to occur when bins are filled/discharged at high rates or if gas counterflow is present. Fluidization often develops in materials that contain...
Book Chapter

By Samuel M. Purdy
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003750
EISBN: 978-1-62708-177-1
...) with 1–10% sodium tridecyl benzene sulfonate. Add 1% HCl to etch alloy steels. 50 (approx.) 120 (approx.) 5–30 Primary structure in cast and welded steels. Swab during etching to remove smut. 5 10 g (NH 4 ) 2 S 2 O 8 in 100 mL H 2 O Room temperature Room temperature 1–10 Segregation, flow...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... in the stressed high-carbon-case microstructures of carburized steels is associated with the combined presence of segregated phosphorus and cementite at prior-austenite grain boundaries. The IG cracking may be associated with other microstructural features, such as the surface oxides generated by gas carburizing...
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 liquid flowing through a mushy zone Fig. 12 Sulfur print showing centerline macrosegregation in a continuously cast steel slab Fig. 4 Inverse segregation in an A1-4.1 Cu ingot with unidirectional solidification Fig. 5 Simulated fluid flow at 50 s after cooling...
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...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005525
EISBN: 978-1-62708-197-9
... cell driven by solutal buoyancy replaces the enriched interdendritic liquid in the mushy zone with fluid from the melt at the nominal composition. (c) The melt superheat is extinguished, and only a weak solutal cell remains. (d) Segregation pattern in completely solidified ingot Fig. 4...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003091
EISBN: 978-1-62708-199-3
... the ironmaking reactor to produce the primary reductant of carbon monoxide gas. The reduction of iron oxide in the blast furnace also partially occurs directly by carbon in the coke. Limestone (CaCO 3 ) and dolomite ((Ca,Mg)CO 3 ) are the common fluxes used in ironmaking. These carbonates are mostly calcined...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005258
EISBN: 978-1-62708-187-0
... higher speeds of rotation to avoid sliding; low casting temperatures can cause laps and gas porosity. Casting temperature also influences solidification rates and therefore affects the amount of segregation that takes place. Numerous investigators have studied the relationship between initial mold...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006086
EISBN: 978-1-62708-175-7
.... The commonly used mechanical methods include water and gas atomization, milling, mechanical alloying, and electrolysis. Some chemical methods include reduction of oxides. This article provides information on the reliable techniques for powder characterization and testing to evaluate the chemical and physical...