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The types of casting alloys that were the subjects f these investigations include gray iron, ductile iron, cast steel, and aluminum-base alloys (A380, A356, and 319). The unetched and etched fracture surfaces and the microstructures were examined using conventional techniques. Several types of casting alloys were fractured using various loading modes (uniaxial tension, bending, impact, and torsion, and cyclic stressing), and the corresponding mechanical properties were determined. In the case of high- alloy chromium alloys, the performance of the material is due to the presence of M7C3 carbides distributed in the iron matrix Resistance to machining and deformation is based on alloy composition and microstructure, while abrasion resistance will depend on properties and wear conditions. It is known that the microstructure of the cast iron is a combination of martensite with a small amount of residual austenite after the heat treatment of the ingot.
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Casting was carried out in an induction furnace and cast into moulds made of KALHARTZ 8500 resin casting mixture and HARTER hardener at SC RanCon SRL Iasi. We have obtained, through the classic casting process, 3 highly chromium-based experimental alloys proposed for replacing the FC 250 classical cast iron in braking applications. Obtaining of High Cr Content Cast Iron Materialsįlorea, C.
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Finally, the cost of NASACC-1 is significantly lower than that of X-40. The welding, brazing, and casting characteristics are excellent. The oxidation resistance surpassed the program goal while maintaining acceptable resistance to hydrogen exposure. NASACC-1 alloy shows stress-rupture and low cycle fatigue properties equivalent to X-40. Furthermore, phase analysis was performed on samples with several heat treated conditions. NASACC-1 alloy was characterized using elevated and room temperature tensile, creep-rupture, low cycle fatigue, heat capacity, specific heat, and thermal expansion testing. Also, hydrogen compatibility and oxygen corrosion resistance tests were used to determine the optimal alloy. Over 40 alloy compositions were evaluated using investment cast test bars for stress-rupture testing. NASACC-1 is a castable iron-base alloy designed to replace the costly and strategic cobalt-base X-40 alloy used in the automotive Stirling engine cylinder/generator housing. The systems and methods provide advantages because additions of manganese to iron aluminum alloys dramatically increase the fluidity of the alloys prior to solidification during casting.Ĭast iron-base alloy for cylinder/regenerator housing A method includes providing an alloy including iron, aluminum and manganese and processing the alloy.
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A composition includes iron, aluminum and manganese. Systems and methods are described for iron aluminum alloys. Cast B2-phase iron-aluminum alloys with improved fluidity