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在480°C固溶温度对AA7108铝合金进行不同工艺的淬火。将合金连续冷却、淬火至中间温度(400,300和200°C)并保温不同时间,再进行工业两步人工时效处理,以获得最大强度(T6)。T6态淬火材料的拉伸试验表明,材料的强度很大程度上取决于冷却/保温时间。通过透射电子显微镜(TEM)观察材料中沉淀物结构来解释材料的力学性能差异。
At 480 ° C solution temperature AA7108 aluminum alloy for different processes of quenching. The alloys were continuously cooled, quenched to intermediate temperatures (400, 300 and 200 ° C) and incubated for different times, followed by an industrial two-step artificial aging treatment to obtain maximum strength (T6). Tensile testing of T6 quenched materials indicates that the strength of the material depends largely on the cooling / holding time. The transmission electron microscope (TEM) was used to observe the sediment structure in the material to explain the differences in the mechanical properties of the material.