TA19双态组织钛合金线性摩擦焊接头的组织结构及演化行为

doi:10.11896/cldb.19060010

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Abstract In this paper,the microstructure of linear friction welded joints of TA19 titanium alloy with bimodal structure was studied. Moreover, the defor-mation behaviors of the equiaxed primary α phase and the lamellar β transformation structure as well as the formation mechanism of the joint were analyzed. The results show that during linear friction welding, the severe and continuous thermoplastic deformation leads to a successive changing process of the bimodal structure, from structure coarsening, deformation, disintegration to a complete fragmentation, and ultimately it turns into the refined grain equiaxed structure. From heat-affected zone of welded joint to welded center, the equiaxed primary α phase undergoes discontinuous plastic deformation, fragmentation and eventually turns into β phase completely, while the lamellar β transformation structure expe-riences deformation, disintegration and ultimately a complete fragmentation.

Key words： TA19 titanium alloy microstructure thermoplastic deformation linear friction welding

Published: 14 July 2020

CLC number:

TG44

About author:: Bohao Tao, a doctoral student of Beihang University, mainly focusing on material processing and welding structure analysis.
Yanhua Zhang, Ph.D., professor, major scientific research areas are material processing and manufactu-ring technology, advanced welding technology.

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Cite this article:

TAO Bohao,LI Ju,ZHANG Yanhua. Microstructure and Evolution Behavior of Linear Friction Welded Joints of TA19 Titanium Alloy with Bimodal Structure[J]. Materials Reports, 2020, 34(14): 14147-14153.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19060010 OR http://www.mater-rep.com/EN/Y2020/V34/I14/14147

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