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- W97703770 abstract "Tensile and impact properties were determined for an alloy steel (3 wt % Cr-1.5 wt % Mo-0.1 wt % V-0.1 wt % C) considered a candidate for elevated-temperature pressure-vessel applications. The steel was tested in two heat-treated conditions: normalized and tempered and quenched and tempered. Mechanical properties were determined for various tempering conditions (time and temperature) as described by a tempering parameter. Similar tempering treatments for the quenched and the normalized steels led to similar strengths. However, for the lowest tempering parameter used, the impact properties for the quenched-and-tempered steel exceeded those for the normalized-and-tempered steel, resulting in an excellent ductile-brittle transition temperature (-70/sup 0/C) and upper-shelf energy (225 J) for the quenched-and-tempered steel at a high strength (770 MPa ultimate tensile strength). Further tempering reduced the strength of the steel in both heat-treated conditions. The impact properties of the quenched steel were only slightly changed by further tempering, but those of the normalized steel improved, eventually equaling those of the quenched-and-tempered steel. Transmission electron microscopy showed that the quenched steel formed carbide-free acicular bainite and that the normalized steel formed granular bainite. The results indicate that properties might be optimized by proper heat treatment. 29 refs., 13 figs., 5 more » tabs. « less" @default.
- W97703770 created "2016-06-24" @default.
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- W97703770 date "1985-09-01" @default.
- W97703770 modified "2023-09-24" @default.
- W97703770 title "Microstructure and mechanical properties of a 3 Cr-1. 5 Mo steel" @default.
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