Natural aging of heterogeneous arc-welded AA6061-AA7075 joints with nanocomposite filler

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science and Technology of Welding and Joining Pub Date : 2022-11-23 DOI:10.1080/13621718.2022.2148066

Narayanan Murali, Shiqi Zheng, Y. Chi, Xiaochun Li

引用次数: 2

Abstract

We report the dissimilar joining of aluminium alloys 6061 and 7075 using filler rods nano-treated with TiC nanoparticles. TiC enables the formation of a fine and equiaxial weld metal microstructure while preventing the formation of hot cracks. Dissimilar joints were also naturally aged, and their strength evolutions were tracked over 8 weeks and compared to a nano-treated, homogeneous AA7075 joint. Heterogeneous weld metals regained over 30 HV with a mix of MgZn2 and Mg2Si strengthening phases. Nano-treatment thus shows great promise, being able to facilitate the fusion welding of a traditionally difficult-to-weld system and enable a natural aging response between two artificially aged alloys.

查看原文本刊更多论文

纳米复合材料填充AA6061-AA7075非均相电弧焊接头的自然时效

本文报道了用TiC纳米颗粒处理的填充棒对6061和7075铝合金进行不同的连接。TiC能够形成良好的等轴焊缝金属组织，同时防止热裂纹的形成。不同的关节也自然老化，并在8周内跟踪其强度演变，并与纳米处理的均匀AA7075关节进行比较。混合MgZn2和Mg2Si强化相后，非均质焊缝金属在30hv以上恢复。因此，纳米处理显示出巨大的前景，能够促进传统上难以焊接的系统的熔焊，并使两种人工时效合金之间产生自然时效反应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Science and Technology of Welding and Joining 工程技术-材料科学：综合

CiteScore

6.10

自引率

12.10%

发文量

审稿时长

1.7 months

期刊介绍： Science and Technology of Welding and Joining is an international peer-reviewed journal covering both the basic science and applied technology of welding and joining. Its comprehensive scope encompasses all welding and joining techniques (brazing, soldering, mechanical joining, etc.) and aspects such as characterisation of heat sources, mathematical modelling of transport phenomena, weld pool solidification, phase transformations in weldments, microstructure-property relationships, welding processes, weld sensing, control and automation, neural network applications, and joining of advanced materials, including plastics and composites.