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- W2094352034 abstract "Abstract An Al3.99Cu2.34Li0.21Zr alloy was prepared by the ultrasonic gas atomization process with an average cooling rate of about 10 5 °C s −1 , achieving an excellent combination of density, strength and elastic moduli. Following cold compaction, the powders were hot extruded at 400 °C into a cylindrical bar of diameter 1.14 cm (0.45 in) with an area reduction ratio of 20:1. Tensile and notched impact tests were conducted at optimum heat treatment conditions. For the heat treatment condition of 525 ° C × 0.5 h + water quenching + 190 ° C × 9 h + water quenching , the ultimate tensile strength could reach up to 540.98 MPa (78.44 lbf in −2 × 10 3 ) and the yield strength could reach 474.21 MPa (68.76 lbf in −2 × 10 3 ) with an elongation of 7.8% and a reduction of area of 22%. Compared with traditional I/M 2024 aluminum alloys, the strength has been significantly improved with little sacrifice in ductility. The Young modulus also increased by about 18%. Density has decreased by about 7%, giving even higher specific strength and modulus values. Scanning electron microscopy was employed to study the fracture surfaces. Ductile dimple fracture surfaces were observed. Transmission electron microscopy was used to examine and identify the precipitates. Various precipitates have been verified to exist in this alloy, and the precipitation reactions were interdependent." @default.
- W2094352034 created "2016-06-24" @default.
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- W2094352034 date "1990-02-01" @default.
- W2094352034 modified "2023-09-29" @default.
- W2094352034 title "The mechanical properties and microstructure of a rapidly solidified Al3.99Cu2.34Li0.21Zr alloy" @default.
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- W2094352034 doi "https://doi.org/10.1016/0921-5093(90)90283-9" @default.
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