Microstructure, mechanical properties and welding quality evaluation of longitudinal welds in hollow magnesium alloy profiles extruded at different ram speeds
Microstructure, mechanical properties and welding quality evaluation of longitudinal welds in hollow magnesium alloy profiles extruded at different ram speeds
复制标题
不同冲压速度挤压空心镁合金型材纵向焊缝的组织、力学性能及焊接质量评价
DOI：
10.1016/j.matchar.2019.03.030
复制
发表时间：
2019-05
影响因子：
4.7
通讯作者：
孙璐
中科院分区：
文献类型：
--
作者：
陆星;赵国群;西华昆;张存生;陈良;孙璐
镁合金薄壁空心型材具有重量轻的优点。然而，分流模挤压空心型材不可避免地存在纵向焊缝。焊缝的焊接质量对型材的力学性能有着至关重要的影响。对一种非对称镁合金空心型材在不同的挤压速度下进行了热挤压实验。系统研究了挤压速度对空心型材纵向焊缝晶粒组织、第二相粒子、织构和力学性能的影响。揭示了组织和织构对纵向焊缝力学性能的影响。分析了不同挤压速度下挤压焊缝的断口形貌和断裂方式。提出了一种基于K准则的镁合金型材焊接质量三维空间评价方法。分别测定了镁合金空心型材三维焊接质量因子K3D和无量纲焊接质量因子K3D的数值。最后，对不同挤压速度下挤压镁合金空心型材纵向焊缝的焊接质量进行了评价。
Thin-walled and hollow profiles of magnesium alloys have more light-weight advantages. However, longitudinal welds exist inevitably in hollow profiles produced by porthole die extrusion. The welding qualities of the welds have a critical impact on mechanical properties of the profiles. In this paper, hot extrusion experiments of an asymmetrical hollow magnesium alloy profile extruded at different ram speeds were carried out. The effects of extrusion speed on grain structure, second phase particles, texture and mechanical properties of longitudinal welds in hollow profiles were systematically studied. The effects of microstructure and texture on mechanical properties of longitudinal welds were revealed. The fracture morphology and fracture mode of the welds extruded at different ram speeds were analyzed. A method based on K criterion for evaluating the welding quality of magnesium alloy profile in three-dimensional space was proposed. The values of three-dimensional welding quality factorK3Dand non-dimensional welding quality factorK⁎of the hollow magnesium alloy profile were determined respectively. Finally, the welding qualities of longitudinal welds in the hollow magnesium alloy profiles extruded at different ram speeds were evaluated.
登录
查看更多内容
DOI：
10.4028/www.scientific.net/kem.424.9
发表时间：
2009-12
期刊：
Key Engineering Materials
影响因子：
--
作者：
A. D. den Bakker;R. Werkhoven;W. Sillekens;L. Katgerman
通讯作者：
A. D. den Bakker;R. Werkhoven;W. Sillekens;L. Katgerman
影响因子：
6.3
作者：
Liang Chen;Jixiao Zhang;Jianwei Tang;Gaojin Chen;Guoqun Zhao;Cunsheng Zhang
通讯作者：
Liang Chen;Jixiao Zhang;Jianwei Tang;Gaojin Chen;Guoqun Zhao;Cunsheng Zhang
DOI：
10.3390/ma11050703
发表时间：
2018-04-29
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Lu X;Zhao G;Zhou J;Zhang C;Yu J
通讯作者：
Yu J
DOI：
10.1007/s13632-013-0099-z
发表时间：
2013-10
期刊：
Metallography, Microstructure, and Analysis
影响因子：
--
作者：
N. Alharthi;W. Misiolek
通讯作者：
N. Alharthi;W. Misiolek
影响因子：
8.4
作者：
Peng, Jian;Zhong, Liping;Pan, Fusheng
通讯作者：
Pan, Fusheng