ECAE法制备铜铝双金属复合棒材数值模拟与试验研究

doi:10.13251/j.issn.0254-6051.2023.10.045

金属热处理 ›› 2023, Vol. 48 ›› Issue (10): 291-296.DOI: 10.13251/j.issn.0254-6051.2023.10.045

ECAE法制备铜铝双金属复合棒材数值模拟与试验研究

张翔¹, 王晓溪², 王海波¹, 张飞², 石凤健³

1.江苏徐工工程机械研究院有限公司, 江苏徐州 221004;
2.徐州工程学院机电工程学院, 江苏徐州 221018;
3.江苏科技大学材料科学与工程学院, 江苏镇江 212003

收稿日期:2023-05-24 修回日期:2023-08-17 出版日期:2023-10-25 发布日期:2023-12-07
作者简介:张翔(1986—),男,高级工程师,博士,主要研究方向为精密塑性成形工艺及变形机理,E-mail:vip525@163.com
基金资助:
国家自然科学基金(51905462);江苏省自然科学基金(BK20201150,BK20221212);江苏省高等学校自然科学研究重大项目(21KJA460007);江苏省第六期“333高层次人才工程”培养

Numerical simulation and experimental research of Cu/Al bimetallic composite rod fabricated by equal channel angular extrusion (ECAE)

Zhang Xiang¹, Wang Xiaoxi², Wang Haibo¹, Zhang Fei¹, Shi Fengjian³

1. Jiangsu XCMG Construction Machinery Research Institute Co., Ltd., Xuzhou Jiangsu 221004, China;
2. School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou Jiangsu 221018, China;
3. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, China

Received:2023-05-24 Revised:2023-08-17 Online:2023-10-25 Published:2023-12-07

摘要/Abstract

摘要： 利用Deform-3D有限元软件对铜铝双金属复合棒材室温4道次B_C路径ECAE变形过程进行模拟,研究了金属流动、挤压载荷、等效应变以及平均应力的分布及变化规律;并在自行设计的模具上进行了试验验证,成功制备出铜铝双金属复合棒材,对变形材料进行了物理网格试验及组织性能测试。结果表明,ECAE工艺下铜铝双金属复合棒材内部存在剧烈剪切变形区,复合坯料由不稳定变形逐渐过渡为均匀协调变形,材料内部处于理想的三向压应力状态,静水压力较高,界面处金属结合紧密。4道次ECAE挤压后,铜铝双金属复合坯料整体变形相对均匀,平均累积等效应变量为4.49。随着挤压道次的增加,载荷峰值不断增加,同时复合坯料内部显微硬度不断升高,但包覆层增幅大于芯部材料。

关键词: 等通道转角挤压(ECAE), 铜铝双金属, 有限元模拟, 载荷曲线, 物理网格试验

Abstract: Deformation behavior of Cu/Al bimetallic composite rod during ECAE process was simulated by DEFORM-3D finite element software. The distribution and variation laws of metal flow, extrusion load, effective strain and mean stress were investigated. Cu/Al bimetallic composite rod was successfully fabricated by 4 passes of equal channel angular extrusion (ECAE) process under B_C route at room temperature. The experimental load displacement curve was extracted and analyzed. The physical grid test and microhardness of the Cu/Al bimetallic composite rod were also tested. The comparison between flow net grid and physical grid shows that there is a severe shear deformation zone inside the Cu/Al bimetallic composite rod during ECAE process. The results show that the Cu/Al bimetallic composite billet gradually experiences from unstable deformation to uniform and coordinated deformation during ECAE process, the material is in an ideal three-dimensional compressive stress state with high hydrostatic pressure, and the metal at the interface is closely bonded. After 4 passes of ECAE, the deformation of Cu/Al bimetallic composite billet is relatively homogeneous in general, and the average accumulated effective strain is about 4.49. As the number of ECAE passes increases, the peak load continues to increase, and the microhardness of the composite billet continues to increase, but the increase in the cladding layer is greater than that of the core material.

Key words: equal channel angular extrusion (ECAE), copper aluminum bimetallic, finite element simulation, load curve, physical grid test

中图分类号:

TG376

张翔, 王晓溪, 王海波, 张飞, 石凤健. ECAE法制备铜铝双金属复合棒材数值模拟与试验研究[J]. 金属热处理, 2023, 48(10): 291-296.

Zhang Xiang, Wang Xiaoxi, Wang Haibo, Zhang Fei, Shi Fengjian. Numerical simulation and experimental research of Cu/Al bimetallic composite rod fabricated by equal channel angular extrusion (ECAE)[J]. Heat Treatment of Metals, 2023, 48(10): 291-296.

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ECAE法制备铜铝双金属复合棒材数值模拟与试验研究

Numerical simulation and experimental research of Cu/Al bimetallic composite rod fabricated by equal channel angular extrusion (ECAE)

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