Effect of rotational speed on friction stir welding microstructure and properties of cast and rolled (ZrB2 + Al3Zr) particle-reinforced aluminum matrix composites
{"title":"Effect of rotational speed on friction stir welding microstructure and properties of cast and rolled (ZrB2 + Al3Zr) particle-reinforced aluminum matrix composites","authors":"GongLin Wang, Hui Li, Lei Jiao, XiaoLong Zhang, XinYao Wang, WeiMing Shen, Cheng Zhang","doi":"10.1007/s10853-024-10283-6","DOIUrl":null,"url":null,"abstract":"<div><p>Friction stir welding of cast and rolled-state aluminum matrix composites is extensively used in many industries, and the speed at which the mixture is stirred profoundly influences the structure and characteristics of the welded connections. The present study investigates the microstructure and mechanical properties of the as-cast and as-rolled (ZrB<sub>2</sub> + Al<sub>3</sub>Zr) particle-reinforced aluminum matrix composites. The welded joints were subjected to friction stir welding at a welding speed of 60 mm/min and stirring speeds of 1000, 1200, and 1400 rpm, separately. At a rotational speed of 1200 rpm, the welded joints exhibit optimal performance with an average hardness of 71.07 HV, a tensile strength of 183.9 Mpa, and an elongation of 16.7%. The weld core region generates precisely shaped equiaxed grains, while the weld matrix facilitates a significant amount of dislocation entanglement. At a rotational speed of 1200 rpm, the grain refinement effect is fully optimized, resulting in an average grain size of 2.94 μm. The recrystallized organization accounts for 70.6% of the grain size. Both types of reinforcing particles are adequately crushed, with the smallest particle size of ZrB<sub>2</sub> particles being less than 100 nm and the smallest particle size of Al<sub>3</sub>Zr particles being less than 1 μm. The two methods of weld reinforcement are fine crystal strengthening and Orowan strengthening.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10853-024-10283-6","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Friction stir welding of cast and rolled-state aluminum matrix composites is extensively used in many industries, and the speed at which the mixture is stirred profoundly influences the structure and characteristics of the welded connections. The present study investigates the microstructure and mechanical properties of the as-cast and as-rolled (ZrB2 + Al3Zr) particle-reinforced aluminum matrix composites. The welded joints were subjected to friction stir welding at a welding speed of 60 mm/min and stirring speeds of 1000, 1200, and 1400 rpm, separately. At a rotational speed of 1200 rpm, the welded joints exhibit optimal performance with an average hardness of 71.07 HV, a tensile strength of 183.9 Mpa, and an elongation of 16.7%. The weld core region generates precisely shaped equiaxed grains, while the weld matrix facilitates a significant amount of dislocation entanglement. At a rotational speed of 1200 rpm, the grain refinement effect is fully optimized, resulting in an average grain size of 2.94 μm. The recrystallized organization accounts for 70.6% of the grain size. Both types of reinforcing particles are adequately crushed, with the smallest particle size of ZrB2 particles being less than 100 nm and the smallest particle size of Al3Zr particles being less than 1 μm. The two methods of weld reinforcement are fine crystal strengthening and Orowan strengthening.
期刊介绍:
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.