{"title":"Thermal Stability of Microstructure on Heat Treatment of Friction Stir Welded AA2014-T651 Aluminum Joints","authors":"Pawan Tripathi, Vipin Sharma","doi":"10.1007/s11041-025-01107-8","DOIUrl":null,"url":null,"abstract":"<p>The effect of heat treatment on the microstructure and mechanical properties of AA2014-T651 aluminum alloy joints produced by friction stir welding was studied. Friction stir welding is performed using a triangular probe tool at two different tool rotational speed of 1000 and 1400 rpm. During welding a constant welding speed of 63 mm/min is maintained at both tool rotational speeds. It has been established that friction stir welding leads to a significant refinement of the microstructure and partial dissolution of strengthening precipitates. The welded joints were heat treated at temperatures of 573, 673, 773 and 823 K for one hour. Re-precipitation and precipitate coarsening were observed during heat treatment. It has been shown that increasing the tool rotational speed significantly increases the thermal stability of the microstructure, practically without causing abnormal grain growth in the weld.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 11-12","pages":"708 - 716"},"PeriodicalIF":0.5000,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metal Science and Heat Treatment","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11041-025-01107-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
The effect of heat treatment on the microstructure and mechanical properties of AA2014-T651 aluminum alloy joints produced by friction stir welding was studied. Friction stir welding is performed using a triangular probe tool at two different tool rotational speed of 1000 and 1400 rpm. During welding a constant welding speed of 63 mm/min is maintained at both tool rotational speeds. It has been established that friction stir welding leads to a significant refinement of the microstructure and partial dissolution of strengthening precipitates. The welded joints were heat treated at temperatures of 573, 673, 773 and 823 K for one hour. Re-precipitation and precipitate coarsening were observed during heat treatment. It has been shown that increasing the tool rotational speed significantly increases the thermal stability of the microstructure, practically without causing abnormal grain growth in the weld.
期刊介绍：
Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering.
Topics covered include:
New structural, high temperature, tool and precision steels;
Cold-resistant, corrosion-resistant and radiation-resistant steels;
Steels with rapid decline of induced properties;
Alloys with shape memory effect;
Bulk-amorphyzable metal alloys;
Microcrystalline alloys;
Nano materials and foam materials for medical use.
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