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用快速凝固法(RS)将Al7075和Al- 75wt%Mn中间合金制成平均厚度为10μm~ 30μm的薄片，使合金中含0~2.5wt%的不同Mn含量。RS片经冷压、除气后，在350℃下挤压成直径为7mm的棒，其挤压比为25∶1。挤压棒在490℃固溶2h随后于120℃时效处理1300min。用SEM和TEM测量RS片和挤压棒的显
The Al 7075 and Al-75 wt% Mn master alloys were formed into flakes having an average thickness of 10 μm to 30 μm by rapid solidification (RS) so that the alloy contained different Mn contents of 0 to 2.5 wt%. RS tablets were cold pressed, degassed and extruded at 350 ° C into rods of 7 mm diameter with an extrusion ratio of 25: 1. Squeeze bars were solutionized at 490 ° C for 2 h followed by aging at 120 ° C for 1300 min. RS and extruded rod were measured by SEM and TEM