| 脉冲磁场处理对7075铝合金性能及组织的影响 |
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| 引用本文： | 师亚洲,逯广平,高翌,廖承志,杨屹.脉冲磁场处理对7075铝合金性能及组织的影响[J].金属热处理,2021,46(9):159-163. |
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| 作者姓名： | 师亚洲 逯广平 高翌 廖承志 杨屹 |
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| 作者单位： | 1.成都成发科能动力工程有限公司, 四川 成都 610503;2.四川大学 机械工程学院, 四川 成都 610065 |
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| 基金项目： | 国家自然科学基金(51575369) |
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| 摘 要： | 采用脉冲磁场对7075铝合金进行了磁处理,并使用室温拉伸、SEM、TEM和XRD等测试手段对比研究了7075铝合金脉冲磁场处理前后的力学性能及显微组织。研究发现,峰值强度为2 T和3 T的脉冲磁场会增大合金的微观应变,促进晶粒择优取向由(200)晶面转变为(111)晶面,但脉冲磁场对合金的拉伸性能无明显影响;峰值强度为1 T的脉冲磁场能够显著促进合金内部小尺寸第二相的回溶,减弱晶界沉淀相的连续性,增加晶界无沉淀析出带的宽度,可在不降低7075铝合金材料强度的情况下提高该材料的塑性。
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| 关 键 词： | 7075铝合金 脉冲磁场处理 组织 性能 |
| 收稿时间： | 2021-04-03 |
Effect of pulsed magnetic field treatment on properties and microstructure of 7075 aluminum alloy |
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| Shi Yazhou,Lu Guangping,Gao Yi,Liao Chengzhi,Yang Yi.Effect of pulsed magnetic field treatment on properties and microstructure of 7075 aluminum alloy[J].Heat Treatment of Metals,2021,46(9):159-163. |
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| Authors: | Shi Yazhou Lu Guangping Gao Yi Liao Chengzhi Yang Yi |
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| Affiliation: | 1. CEGC Science and Energy Company, Chengdu Sichuan 610503, China;2. School of Mechanical Engineering, Sichuan University, Chengdu Sichuan 610065, China |
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| Abstract: | The 7075 aluminum alloy was treated by pulsed magnetic field, and the mechanical properties and microstructure of the alloy before and after pulsed magnetic field treatment were studied by using room temperature tensile test, SEM, TEM and XRD testing methods. The results show that pulsed magnetic fields with peak intensity of 2 T and 3 T can increase the microscopic strain of the alloy and promote the transformation of the preferred orientation of grains from (200) crystal planes to (111) crystal planes, but it does not significantly affect the tensile properties of the alloy. A pulsed magnetic field with a peak intensity of 1 T can significantly promote the re-dissolution of the small-sized second phase inside the alloy, weaken the continuity of the grain boundary precipitation phase, and broaden the width of the grain boundary precipitation-free zone, so that the plasticity of the 7075 aluminum alloy can be improved without reducing the strength. |
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| Keywords: | 7075 aluminum alloy pulsed magnetic field treatment microstructure properties |
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