Investigations on mechanical and surface properties of friction stir welded dissimilar joints of 2507 SDSS and 317L ASS

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL Tribology International Pub Date : 2024-09-12 DOI:10.1016/j.triboint.2024.110226

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Abstract

Friction stir welding (FSW), recognized as an eco-friendly and safe welding technique, finds widespread application across industries including aerospace, and automotive sectors. As a key material in production, stainless steel (SS) has great application potential in FSW. In this article, solid-state joining of dissimilar materials 2507 super duplex stainless steel (SDSS) and 317 L austenitic stainless steel (ASS), using FSW was investigated. By adjusting the position of 2507 SDSS and 317 L ASS, this paper examined the mechanical and surface properties of the joints at rotation speed of 400 rpm and welding speed of 20 mm/min. The results revealed that alteration of the material position seemed to have negligible influence on the joint's appearance, tensile behavior, and failure location. However, a clear grain refinement post-FSW in the joints was recorded, leading to a substantial increase in the hardness of the center stir zone (CSZ), alongside noticeably enhanced wear resistance. This grain refinement also contributed to an improvement in the corrosion resistance of the joints.

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2507 SDSS 和 317L ASS 异种摩擦搅拌焊接接头的机械和表面特性研究

搅拌摩擦焊（FSW）是公认的环保、安全的焊接技术，在航空航天和汽车等行业得到广泛应用。作为生产中的关键材料，不锈钢（SS）在搅拌摩擦焊中有着巨大的应用潜力。本文研究了使用 FSW 焊接 2507 超级双相不锈钢（SDSS）和 317 L 奥氏体不锈钢（ASS）这两种异种材料的固态焊接。通过调整 2507 SDSS 和 317 L ASS 的位置，本文在转速为 400 rpm、焊接速度为 20 mm/min 的条件下考察了接头的机械性能和表面性能。结果表明，材料位置的改变似乎对接头的外观、拉伸行为和失效位置的影响微乎其微。然而，在焊接后，接头中的晶粒明显细化，导致中心搅拌区（CSZ）的硬度大幅提高，同时耐磨性也明显增强。晶粒细化还有助于提高接头的耐腐蚀性。

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.