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強(qiáng)制冷卻攪拌摩擦加工2024鋁合金的組織性能研究
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國家自然科學(xué)基金(51074119)；陜西省教育廳科學(xué)研究計劃項目(11JK0802)；教育部高等學(xué)校博士學(xué)科點專項科研基金(20096120110012)


Microstructure and Properties of Forced Cooling Friction Stir Processed 2024 Aluminum Alloy
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    摘要:

    在強(qiáng)制冷卻條件下對2024-T4鋁合金板進(jìn)行攪拌摩擦加工，分析了各區(qū)(母材區(qū)、熱機(jī)影響區(qū)、攪拌區(qū))的組織形貌特征，并研究了前進(jìn)速度對加工區(qū)組織性能的影響。結(jié)果表明，從母材、熱機(jī)影響區(qū)到攪拌區(qū)晶粒逐漸減小，攪拌區(qū)為均勻細(xì)小的再結(jié)晶組織，平均晶粒尺寸達(dá)1.9 μm；母材大部分為大角度晶界，熱機(jī)影響區(qū)主要為小角度晶界，攪拌區(qū)取向差分布呈雙峰模態(tài)。攪拌區(qū)硬度和抗拉強(qiáng)度隨前進(jìn)速度增大而增大

    Abstract:

    Friction stir processing was applied to 2024-T4 aluminum alloy plate under the condition of forced cooling. The microstructure of each zone (the base metal, the thermo-mechanically affected zone, the stir zone) and the effect of the advancing speed on the mechanical properties of the stir zone were studied. The results show that the grain size decreases gradually from the base metal, through the thermo-mechanically affected zone, to the stir zone. The microstructure in the stir zone is significantly refined and the grains are distributed uniformly with an average size of 1.9 μm. The base metal exhibits a large number of high-angle grain boundaries, while the thermo-mechanically affected zone has numerous low-angle grain boundaries. The distribution of misorientation angle in the stir zone presents a bimodal phenomenon. Hardness and tensile strength of the stir zone are increased with higher advancing speed

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王快社,孔 亮,王 文,林兆霞,王 峰.強(qiáng)制冷卻攪拌摩擦加工2024鋁合金的組織性能研究[J].稀有金屬材料與工程,2013,42(5):1053~1056.[Wang Kuaishe, Kong Liang, Wang Wen, Lin Zhaoxia, Wang Feng. Microstructure and Properties of Forced Cooling Friction Stir Processed 2024 Aluminum Alloy[J]. Rare Metal Materials and Engineering,2013,42(5):1053~1056.]
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  • 收稿日期:2012-04-08
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