Quick Semi-Solid Slurry Making Method Using Metallic Cup

The needs for high-strength and light weight structural materials have increased in automotive and aerospace structure applications. The semi-solid processed light alloys inherently offer the opportunity to produce high integrity components for these requirements. Various processing methods exist for applying agitation to a molten metal during solidification to obtain metal slurries suitable for semi-solid metal processing. In this paper, a new technique (Cup-Cast method) to achieve semi-solid metal structure using agitation and direct spherical growth during solidification is reported. Cup-Cast method is the most quick and simple semi-solid processing route which semi-solid slurry would be prepared just by pouring molten metal into a metallic cup. In this study Cup-Cast method was introduced and effect of process parameters on micro-structural characterization of slurry prepared by this method was investigated.

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A Novel Technique to Produce Metal Slurries for Semi-Solid Metal Processing

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.116-117.366 ◽

2006 ◽

Vol 116-117 ◽

pp. 366-369 ◽

Cited By ~ 31

Author(s):

J. Wannasin ◽

R. Andy Martinez ◽

M.C. Flemings

Keyword(s):

Molten Metal ◽

Systematic Study ◽

Necessary Conditions ◽

Metal Structure ◽

Solid Metal ◽

Metal Structures ◽

Novel Technique ◽

Metal Processing ◽

A New Technique ◽

Semi Solid

Various processing methods exist for applying agitation to a molten metal during solidification to obtain metal slurries suitable for semi-solid metal processing. . In this paper, a new technique to achieve semi-solid metal structure using agitation during solidification is reported. The technique applies a new medium and means to efficiently create semi-solid metal structures. The results of a systematic study showing the feasibility and the necessary conditions to achieve the structure are discussed.

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Alumina PVD Tool Coatings for the Use in Semi Solid Metal Forming of Steel

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.116-117.704 ◽

2006 ◽

Vol 116-117 ◽

pp. 704-707 ◽

Cited By ~ 13

Author(s):

Kirsten Bobzin ◽

Erich Lugscheider ◽

Michel Maes ◽

Philipp Immich

Keyword(s):

Thin Film ◽

Metal Forming ◽

Physical Vapor Deposition ◽

Field Tests ◽

High Strength ◽

Solid Metal ◽

Tool Coatings ◽

Semi Solid ◽

Steel Substrates ◽

Very High

The process of semi solid metal forming with permanent moulds combines the advantages of the process technologies casting and forging. Semi solid metal forming of steel is a challenge with respect to very high thermal, mechanical and tribological stresses of tools. Alumina based ceramics show a very high potential for tool protection. Alumina occurs in different known meta stable phases. First experiments show that the high temperature γ-phase exhibits high strength and toughness. Various methods and technologies have examined γ-phase stabilisation by using different thin film process technologies. By using Physical Vapor Deposition (PVD) it was possible to deposit γ-Alumina in a temperature range, where hot working steel can be utilized. The properties of the by pulsed reactive magnetron sputtering deposited films were analyzed by common thin film techniques revealing hardness, Young´s modulus and coating adhesion. By using the reactive pulsed PVD-process it was possible to stabilize γ-Al2O3 on steel substrates for semi-solid melt protection. The γ-Al2O3 coatings showed an extra ordinary stability for thixoforging of X210CrW12 and 100Cr6 in field tests. The durability of the permanent moulds was increased by using PVD thin film coatings as a tool protection.

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Constitutive modeling and characterization of the flow behavior of semi-solid metal alloys slurries—I. The flow response

Acta Metallurgica et Materialia ◽

10.1016/0956-7151(94)90426-x ◽

1994 ◽

Vol 42 (11) ◽

pp. 3595-3602 ◽

Cited By ~ 63

Author(s):

P. Kumar ◽

C.L. Martin ◽

S. Brown

Keyword(s):

Constitutive Modeling ◽

Flow Behavior ◽

Solid Metal ◽

Metal Alloys ◽

Flow Response ◽

Semi Solid

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Constitutive modeling and characterization of the flow behavior of semi-solid metal alloy slurries—II. Structural evolution under shear deformation

Acta Metallurgica et Materialia ◽

10.1016/0956-7151(94)90427-8 ◽

1994 ◽

Vol 42 (11) ◽

pp. 3603-3614 ◽

Cited By ~ 47

Author(s):

C.L. Martin ◽

P. Kumar ◽

S. Brown

Keyword(s):

Shear Deformation ◽

Constitutive Modeling ◽

Flow Behavior ◽

Structural Evolution ◽

Solid Metal ◽

Metal Alloy ◽

Semi Solid

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Characterization of the microstructure evolution of a semi-solid metal slurry during the early stages

Acta Materialia ◽

10.1016/j.actamat.2012.03.002 ◽

2012 ◽

Vol 60 (8) ◽

pp. 3501-3510 ◽

Cited By ~ 51

Author(s):

R. Canyook ◽

J. Wannasin ◽

S. Wisuthmethangkul ◽

M.C. Flemings

Keyword(s):

Microstructure Evolution ◽

Solid Metal ◽

Early Stages ◽

Semi Solid

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Synthesis and Characterization of New Cast A356(Al2O3)P Metal Matrix Nano-Composites

ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials ◽

10.1115/mn2008-47049 ◽

2008 ◽

Cited By ~ 5

Author(s):

I. S. El-Mahallawi ◽

K. Eigenfeld ◽

F. H. Kouta ◽

A. Hussein ◽

T. S. Mahmoud ◽

...

Keyword(s):

Metal Matrix ◽

Mechanical Characterization ◽

High Strength ◽

Nano Particles ◽

Nano Composites ◽

High Corrosion Resistance ◽

Characterization Methods ◽

Semi Solid ◽

New Generation

The present investigation studies the processing of A356 Al-Si alloy containing up to 5% vol.-% nano-sized al2o3 particles having size less than 500 nm. Composites were prepared using semi-solid casting route. To evaluate the results the alloys were further characterised by various metallurgical and mechanical characterization methods. The results showed that introducing nano-particles into semi-solid slurries promises to be a successful route for producing a new generation of cast metal matrix nano-composites (MMNCs). The nano-composites showed high strength values associated with superior ductility, low porosity content, high corrosion resistance, and improved electrical conductivity compared to the alloy without particles addition under the same casting conditions.

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Electroplated Connections Between Carbon Fiber and Nickel

Journal of Electronic Packaging ◽

10.1115/1.4035703 ◽

2017 ◽

Vol 139 (1) ◽

Cited By ~ 1

Author(s):

Christopher Bilger ◽

Hugh A. Bruck ◽

Abhijit Dasgupta

Keyword(s):

Carbon Fiber ◽

High Strength ◽

Nickel Metal ◽

Thermal Dependence ◽

Lower Load ◽

Bond Strengths ◽

A New Technique ◽

Clad Steel ◽

Battery Discharge

Carbon has become an attractive material for electronic packaging applications, such as interconnects, because of its low density and reasonable electrical conductivity. One challenge in these applications is overcoming the inherent chemical incompatibility between carbon and metals that limits adhesion. Recently, we explored a new technique for electroplating carbon fibers with nickel. Electroplated carbon fiber tows were soldered to nickel metal tabs using SAC 305 (Sn3Ag0.5Cu). The electroplated nickel was found to be free of microvoids with (Ni,Cu)3Sn4 forming as intermetallic compounds (IMCs) in an annular region presumed to be Ni3Sn4 at the SAC 305-Ni interface. Mechanical characterization of the carbon fiber–nickel interface revealed bond strengths up to 434 N, which is similar to a 22 gauge high strength copper clad steel. Electrical resistances were found to be as low as 1.1 Ω for a 38.1 mm long connection. Carbon–metal connections prepared using silver epoxy were found to have 80% lower load bearing capacity and 10–20% higher electrical resistance. Battery discharge tests indicated that the carbon connections reduced performance by only 4% compared to conventional copper. The performance drop increased to 7% when the discharge time was increased by 50%, indicating some thermal dependence. The electroplating technique is a fairly simple and inexpensive means of enhancing the wettability of carbon fiber to create scalable carbon-based conductors for low current systems.

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