Rheocasting of Aluminium Alloys and Thixocasting of Steels

Bünck, Matthias; Küthe, Fabian; Bührig–Polaczek, Andreas

doi:10.1002/9783527623969.ch9

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…is statement is supported by Bünck et al [43] that speci�ed that the shape factor must be below 2 in order to have good mold �lling behavior. e equation of shape factor ( ) is given below:…”

Section: Effect Of Feedstock Production Methods On the Mechanical Propmentioning

confidence: 58%

An Overview of Semisolid Processing of Aluminium Alloys

Salleh

Omar

Syarif

et al. 2013

ISRN Materials Science

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Semisolid metal processing (SSM) or thixoforming is a new technology that offers several advantages over liquid processing and solid processing. is process utilizes semisolid behavior as well as reduces macrosegregation, porosity, and forming forces during shaping process. A lot of research work has been carried out by various researchers in order to exploit the potential of this process to produce different products especially for automotive industry. is paper will summarise the rheological behavior of aluminium alloys in semisolid slurries, thixoformability of modi�ed aluminium alloys, the effect of feedstock production method on mechanical properties, and the importance of developing low-cost raw materials for semisolid processing.

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Section: Effect Of Feedstock Production Methods On the Mechanical Propmentioning

confidence: 58%

An Overview of Semisolid Processing of Aluminium Alloys

Salleh

Omar

Syarif

et al. 2013

ISRN Materials Science

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“…So, high values of shape factor are desirable for semisolid practices. Shape factor values higher than 0.7 are reported as a suitable amount for thixoforming of steels [17] and zinc alloys [18]. As shape factor is a geometrical feature of solid particles, its role on viscosity and die filling ability seems to be less related to the material type.…”

Section: Microstructurai Evolutionmentioning

confidence: 98%

Effect of Cooling Rate on Mechanical Properties of 7075 Aluminum Rods Extruded in Semisolid State

Ketabchi

Shafaat

Shafaat³

et al. 2014

Journal of Engineering Materials and Technology

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Semisolid extrusion of metals involves extrusion of metallic alloys with a microstructure consisting of spherical solids in a liquid matrix. In this research, the effect of cooling rate during forward semisolid extrusion on micro structure and mechanical properties of 7075 aluminum was investigated. Semisolid microstructtire was prepared according to the recrystallization and partial melting (RAF) method. Optimum semisolid temperature and holding time which were resulted in a suitable microstructure for specimens were determined at 580 "C for 10 min. Different cooling rates were applied during semisolid extrusion and the resulted mechanical properties were studied. Tensile properties of semisolid extruded rods in T6 condition were also compared with those of conventionally extruded specimen. The results indicate that utilizing optimum values of semisolid extrusion parameters, namely, temperature and time of heating as well as cooling rate severity, brings both the possibility to obtain mechanical properties of conventionally extruded specimens and to get advantages of semisolid forming technique. Experimental results also show that increment of cooling rate and extrusion pressure improves the mechanical properties.

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