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Aluminum Alloy Castings: Properties, Processes And by J. Gilbert Kaufman, Elwin L. Rooy

By J. Gilbert Kaufman, Elwin L. Rooy

Aluminum Alloy Castings presents estate and function facts for every type of aluminum alloy castings and studies and describes the criteria that give a contribution to and have an effect on these homes, together with composition, microstructure, casting method, warmth therapy, and caliber insurance. the amount positive factors wide collections of estate and function information, together with formerly unpublished getting older reaction curves, progress curves, and fatigue curves. those information are offered in constant codecs to allow effortless comparisons between assorted alloys and tempers. The authors have endeavored to handle the entire casting method applied sciences on hand for aluminum alloys. Engineering info is incorporated for expendable mildew, everlasting mould, and strain die casting approaches and their diversifications. the point of interest of the method assurance is to check the consequences of method choice and procedure variables on casting homes and function. consultant examples of aluminum castings purposes are supplied. This ebook can be of vital price to fabrics and layout engineers considering the overview, choice and specification of aluminum casting purposes and to casting manufacturers as a method of higher knowing, quantifying, enhancing, and selling the functionality features of aluminum castings.

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10 to 20 mm) thick. The mold is formed by introducing the chemically coated sand to a heated pattern that thermally cures the bond. By controlling the core mold temperature and cycle, the depth of cure can be controlled to the desired thickness. Cured mold sections are removed and assembled for pouring, usually backed by unbonded or green sand (Fig. 5). Shell mold castings surpass ordinary sand castings in surface finish and dimensional accuracy and cool at slightly higher rates; however, equipment and production costs are higher, and the size and complexity of castings that can be produced are limited.

20 Alloy 359/SiC/20p metal-matrix composite brake rotor. Source: Ref 6 Fig. 21 Metal-matrix composite (MMC) cylinder liners. The MMC offers an alternative to cast iron or hypereutectic aluminum-silicon alloy for this application. 3 Hot Isostatic Pressing (HIP) The application of hot isostatic pressing (HIP) to aluminum alloys following casting is a key technology for improving properties by reducing or eliminating the effects of porosity and inclusions. This technology is sufficiently important that it is covered in a separate chapter (Chapter 6), following the discussion of the nature and cause of such imperfections.

The advantages of typical sand casting are versatility in a wide variety of alloys, shapes, and sizes. Alloys considered hot short because of cracking tendencies during solidification are more easily cast in green sand since molds offer reduced resistance to dimensional contraction during solidification. Lower mold strength is also advantageous for parts with widely varying section thicknesses and intricate designs. These advantages are diminished in chemically bonded molds, which display greater rigidity than green sand molds.

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