| Al-Li合金弯曲过程中微观组织结构演变与应变集中的DIC/EBSD耦合分析 |
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| 引用本文： | 金晓,张国栋,赵彦芬,柳文波,薛飞. Al-Li合金弯曲过程中微观组织结构演变与应变集中的DIC/EBSD耦合分析[J]. 稀有金属材料与工程, 2019, 48(3): 716-720 |
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| 作者姓名： | 金晓 张国栋 赵彦芬 柳文波 薛飞 |
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| 作者单位： | 苏州热工研究院有限公司，清华大学,苏州热工研究院有限公司,苏州热工研究院有限公司,西安交通大学,苏州热工研究院有限公司 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目）,国家重点基础研究发展计划（973计划） |
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| 摘 要： | 本文通过SEM、EBSD和DIC相结合的方法对2060-T8铝合金在弯曲变形过程中微观组织结构进行表征并对其损伤机制进行了研究。文章基于DIC和EBSD准原位技术,发展了一种以弥散分布的铜粉末为标记点的同一区域应变测量和微观结构表征技术。实验结果显示合金在弯曲过程中形成了宏观剪切带且裂纹的扩展也是沿着宏观剪切带进行,造成这种现象的原因是由于在形变过程中在宏观剪切带上由于产生了大量的小角晶界,而裂纹沿此方向进行扩展所需的能量是最小的。
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| 关 键 词： | Al–Li合金 变形 微观结构 断裂 |
| 收稿时间： | 2017-10-11 |
| 修稿时间： | 2019-01-16 |
A coupled DIC/EBSD analysis of the microstructure evolution and strain localization during bending in Al-Li alloy |
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| jinxiao,Zhang Guodong,ZhaoYanfeng,LiuWenbo and Xue Fei. A coupled DIC/EBSD analysis of the microstructure evolution and strain localization during bending in Al-Li alloy[J]. Rare Metal Materials and Engineering, 2019, 48(3): 716-720 |
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| Authors: | jinxiao Zhang Guodong ZhaoYanfeng LiuWenbo Xue Fei |
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| Abstract: | The damage mechanism of commercial 2060 (T8) aluminum alloy during bending was studied in this work. The microstructure evolution and strain localization was collected by Electron Backscattered Diffraction (EBSD) and Digital Image Correlation (DIC) methods, respectively. The new method based on the dispersion distribution of copper powders was developed, which can be used to characterize the strain distribution and microstructure evolution of the same region simultaneously. The experimental results showed that macro shear band formed during bending and the crack grow along the macro shear band, the reason for this phenomenon can be attributed to the larger volume fraction of Small Angle Grain Boundary (SAGBs) formed in the region of macro shear band, since less energy was needed if the crack propagated along the direction of macro shear bands. |
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