点阵强变形轧制镁/铝层合板成形特性

冯光; 郜豪杰; 申依伦; 张恒

点阵强变形轧制镁/铝层合板成形特性

冯光^{1, 2, 3, ,},
郜豪杰¹,
申依伦¹,
张恒¹

1.
太原理工大学　机械与运载工程学院, 太原 030024
2.
先进金属复合材料成形技术与装备教育部工程研究中心, 太原 030024
3.
太原理工大学　先进成形与制造技术中澳联合研究中心, 太原 030024

基金项目: 国家自然科学基金 (52074190)；山西省留学回国人员科技活动择优资助重点项目(20220007)；山西省科技重大专项资助项目(20181101008)

详细信息

通讯作者:
冯光，博士，副教授，研究方向为金属层合板轧制理论与技术　E-mail：feng_guang@yeah.net

中图分类号: TG335.1
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-08
- 修回日期: 2022-10-11
- 录用日期: 2022-10-15
- 网络出版日期: 2022-10-27
- 刊出日期: 2023-08-15

Forming characteristics of Mg/Al laminated composite based on lattice severe deformation rolling

FENG Guang^{1, 2, 3
, ,},
GAO Haojie¹,
SHEN Yilun¹,
ZHANG Heng¹

1.
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Ministry of Education, Taiyuan 030024, China
3.
TYUT-UOW Joint Research Centre of Advanced Forming and Manufacturing Technology, Taiyuan University of Technology, Taiyuan 030024, China

Funds: National Natural Science Foundation of China(52074190)；Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province(20220007)；Major Science and Technology Project of Shanxi Province (20181101008).

摘要

摘要: 镁/铝层合板兼具镁合金比强度高、比刚度高和铝合金耐腐蚀性强的优点，能够充分发挥组元材料性能优势，在航空航天、轨道交通、国防军工等领域有广阔的工程应用前景，是当今工业产品轻量化方向重点发展的高性能复合材料。由于镁合金与铝合金物理和力学性能上的差异，采用传统方法轧制镁/铝层合板存在结合强度低、板形翘曲和边裂严重等技术难题。本文基于一种新型的轧制原理——点阵强变形轧制(Lattice Severe Deformation Rolling，LSDR)，研究两种组元板材在复杂辊缝下的塑性流动规律和成形特点，并通过轧制实验进行了验证。发现当采用特殊设计的波纹轧辊对难变形金属板材施加点阵分布的强非均匀变形作用时，能够在镁合金板材表面和结合界面处生成网格状三维结构，增大结合界面结合面积的同时可以获得板形平直、无可见边裂的镁/铝层合板；轧制过程中，波纹辊迫使镁合金板局部位置产生剧烈的塑性变形，增强材料沿轧向和横向的流动，相比于传统平轧在结合界面处会产生更大的剪切应力，诱发更多新鲜金属原子暴露，有利于提高金属原子扩散机率，进而形成可靠的冶金结合；LSDR原理轧制所得镁/铝层合板的力学性能测试结果显示，各项力学性能参数均优于传统平轧，在轧向和横向上，抗拉强度各提升9.5%和4.4%，拉剪强度各提升34.5%和78.4%，抗弯强度各提升19%和22%，结合界面处生成了约5μm的扩散层，界面处无空隙、裂纹、界面分层等缺陷；波纹辊对镁合金板晶粒细化效果显著。本文研究为高质量双金属层合板的制备提供了技术参考。1点阵强变形原理轧制镁/铝层合板方案2镁/铝层合板样件
- LSDR /
- 波纹辊 /
- 镁/铝层合板 /
- 界面 /
- 结合性能
Abstract: Aiming at the technical problems such as low bonding strength, serious warpage and edge cracks in the rolling process of Mg/Al laminated composite, one rolling pass forming with a corrugated roll was studied based on Lattice Severe Deformation Rolling (LSDR) principle. The plastic flow law and forming characteristics of the metal plates at complex roll gap were analyzed by finite element numerical calculation, and the rolling experiment was performed. The results show that a series of local strong non-uniform deformation effects distributed as a lattice structure can be applied on the magnesium alloy plate and at the bonding interface by the corrugated roll, and the plastic flow along both rolling direction (RD) and transverse direction (TD) has been strengthened when the LSDR principle is used. Additionally, larger shearing stress can be produced at the bonding interface. Compared with the traditional rolling using flat rolls, the tensile strength, tensile-shear strength and bending strength of the laminated composite prepared on the LSDR principle are significantly improved, and the maximum increase rate of tensile-shear strength obtained reaches 77%. Meanwhile, the bonding interface is uniform and reliable. The diffusion layer is about 5 μm thick. This study provides a valuable reference for the preparation of high-quality Mg/Al laminated composite.
- LSDR /
- corrugated roll /
- Mg/Al laminated composite /
- interface /
- bonding performance

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图 1 点阵强变形轧制(LSDR)原理轧制镁/铝层合板方案

Figure 1. Scheme of rolling Mg/Al laminated composite based on Lattice Severe Deformation Rolling (LSDR) principle

下载: 全尺寸图片幻灯片

图 2 镁/铝层合板轧制实验设备

Figure 2. Equipment for Mg/Al laminated composite rolling

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图 3 镁/铝层合板界面处沿轧向(RD)和横向(TD)等效应变

Figure 3. Effective strain of Mg/Al laminated composite along rolling direction (RD) and transverse direction (TD) at the bonding interface

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图 4 镁/铝层合板样件

Figure 4. Mg/Al laminated composite sample

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图 5 镁/铝层合板力学性能测试结果

Figure 5. Mechanical property test results of the Mg/Al laminated composite

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图 6 镁/铝层合板结合界面波峰和波谷处SEM图像EDS结果

Figure 6. SEM image and EDS results of the bonding interface peak and trough of the Mg/Al laminated composite

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图 7 镁/铝层合板沿RD和TD结合界面波谷处EBSD结果

Figure 7. EBSD results of the bonding interface trough along RD and TD of the Mg/Al laminated composite

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图 8 镁/铝层合板结合界面波谷处的再结晶晶粒组织分布及占比

Figure 8. Microstructure distribution and proportion of recrystallized grains at bonding interface trough of the Mg/Al laminated composite

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表 1 AZ31B与5052的化学成分

Table 1. Chemical composition of AZ31B and 5052 (wt%)

Material Mg Cu Ca Mn Si Al Zn Cr Fe

AZ31 B Others 0.01 0.04 0.8 0.07 3.2 1.2 - -
5052 2.2-2.8 0.1 - 0.1 0.25 Others 0.1 0.15-0.35 0.4

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