| 董刘颖,谢方亮,陈利,刘兆伟,孟旭,李秋梅,李鹏伟.微量元素对铝合金防撞梁弯曲性能的影响[J].有色金属材料与工程,2021,42(5):37-41. |
| 微量元素对铝合金防撞梁弯曲性能的影响 |
| Influence of Trace Elements on the Bending Performance of Aluminum Alloy Anti-collision Beam |
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| DOI：10.13258/j.cnki.nmme.2021.05.006 |
| 中文关键词: 弯曲性能 显微组织 微量元素 析出相 铝合金 |
| 英文关键词:bending property microstructure trace elements precipitated phase aluminum alloy |
| 基金项目:辽宁省‘兴辽英才计划’项目资助（XLYC1802054） |
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| 摘要点击次数: 1804 |
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| 中文摘要: |
| 采用光学显微镜、扫描电子显微镜（scanning electron microscope，SEM）、能谱仪（energy dispersive spectrometer，EDS）、电子万能实验机等测试分析手段，研究了不同微量元素对汽车防撞梁挤压型材组织、强度及弯曲性能的影响。研究结果表明：1#试样中Mn的质量分数为0.50%～0.60%、Fe的质量分数为0.16%，其受拉应力侧再结晶层厚度为110.52 μm，基体中粗大杂质相尺寸最大，亚微米级相最少，弯曲后试样断裂；2#试样中Mn的质量分数为0.40%～0.50%、Fe的质量分数为0.20%，其为再结晶组织，弯曲后型材表面产生严重橘皮后开裂；3#试样中Mn的质量分数为0.60%～0.70%，Fe的质量分数为0.11%，其受拉应力侧无再结晶层，杂质相尺寸最小、亚微米级相最多，弯曲后型材表面光滑，未产生开裂。EDS结果显示，合金基体中的杂质相主要为硬脆的AlFeMnSi和富Si初生相。 |
| 英文摘要: |
| By means of optical microscope, scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and electronic universal testing machine, the effects of different trace elements on the microstructure, strength and bending properties of extruded profiles of automobile crash beam were studied. The results show that the mass fraction of Mn in 1# sample is 0.50%-0.60%, the mass fraction of Fe is 0.16%, and the thickness of recrystallization layer on the tensile stress side is 110.52 μm. The size of coarse impurity phase in the matrix is the largest, and the size of submicron phase is the least. The sample will fracture after bending. The mass fraction of Mn in 2# sample is 0.40%-0.50%, the mass fraction of Fe is 0.20%, and it is recrystallized structure. After bending, the surface of the profile cracks after serious orange peel appears. The mass fraction of Mn in 3# sample is 0.60%-0.70%, and the mass fraction of Fe is 0.11%. There is no recrystallization layer on the tensile stress side. The impurity phase size is the smallest, and the submicron phase size is the most. After bending, the surface of the profile is smooth without cracking. The EDS results show that the impurity phases in the alloy matrix are mainly hard and brittle AlFeMnSi and Si-rich primary phases. |
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