首页|多道次拉伸和感应电流处理5052铝合金的力学性能和显微组织演变

多道次拉伸和感应电流处理5052铝合金的力学性能和显微组织演变

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提出一种多道次拉伸和感应电流处理(IEPT)相结合的复合成形方法,采用TEM和EBSD揭示感应电流对材料显微组织和力学性能的影响规律.结果表明,采用4次拉伸5％和拉伸后放电,材料伸长率比原始材料增加145％.预拉伸试样经过IEPT处理后,强度下降、塑性提高,材料的位错密度下降,晶粒变形结构向亚结构转变,同时晶粒尺寸略有增加.感应电流减弱材料的各向异性,出现新的<111>//TD织构.电塑性效应和焦耳热效应的结合增强位错运动和空位移动.采用ANSYS软件模拟板料的温度分布,最高温度达到144.7 ℃.材料强度的理论计算结果与实验数据一致.
Mechanical properties and microstructural evolution of 5052 aluminum alloys by multi-pass stretching and induced electro-pulsing treatment
A compound-forming method that combines multi-pass stretching and induced electro-pulsing treatment(IEPT)is proposed.The effects of induced current on the microstructure and mechanical properties of material were investigated using transmission electron microscopy and electron backscatter diffraction measurements.The samples stretched by 5％each time showed 145％increase in elongation after 4 stretching and IEPT cycles.The IEPT caused"stress drop"in pre-deformed sheets,while the plasticity increased.Meanwhile,the dislocation density decreased,the deformation structure changed to the substructure,and the grain size increased slightly.The material anisotropy was reduced and a new<111>//TD texture appeared after IEPT.The combination of electrical effect and Joule heating enhanced dislocation mobility and vacancy movement.The temperature distribution,with a maximum temperature reaching 144.7 ℃,was simulated using ANSYS software.The theoretical calculation results were consistent with experimental data.

5052 aluminium alloyinduced electro-pulsingtexture evolutionJoule thermal simulationstrength calculation

王世鹏、崔晓辉、肖昂、余卓行、杜志浩

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中南大学轻合金研究院,长沙 410083

中南大学机电工程学院,长沙 410083

中南大学高性能复杂制造国家重点实验室,长沙 410083

5052铝合金 感应电流 织构演变 焦耳热模拟 强度计算

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProject of State Key Laboratory of High-Performance Complex Manufacturing,Central South University,China

5177556352275394ZZYJKT2020-02

2024

10.1016/S1003-6326(23)66382-4

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(1)
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