Experimental characterization of Ti6AI4V T joints welded through linear friction welding technique： microstructure and NDE  

作　　者：Antonello Astarita Mario Coppola Sergio Esposito Mariacira Liberini Leandro Maio Ilaria Papa Fabio Scherillo Antonino Squillace 

机构地区：[1]Department of Chemical, Materials and ProductionEngineering, University of Naples "Federico II", PiazzaleTecchio 80, 80125 Naples, Italy [2]Fox Bit srl, viale Luraghi presso consorzio I1 Sole,80038 Pomigliano d'Arco, NA, Italy [3]Leonardo Company S.p.A.- Aircraft Division, Engineering -AT&D, Manufacturing and Assembly Research andDevelopment, Viale dell'Aeronantica, s/n,80038 Pomigliano d'Arco, NA, Italy [4]Department of Industrial Engineering - Aerospace Division,University of Naples "Federico II", Via Claudio, 21, Naples,Italy

出　　处：《Advances in Manufacturing》2016年第4期305-313,共9页先进制造进展（英文版）

摘　　要：Linear friction welding （LFW） is an innovative solid-state welding technique that allows to manufacture joints with high mechanical properties. This technology has various applications in the aerospace field; in particular it is used to weld massive structural components made of Ti6A14V. This paper deals with the experimental study of Ti6A14V T-joints welded through LFW, with particular focus on the effectiveness of ultrasonic control in detecting and distinguishing welding defects within the joints. Aiming to this scope, joints with different properties were manufactured and tested： some were free from defects but with different metallurgy, and some had different types of defects. The results obtained proved that the ultrasonic control was an effective method to detect and identify defects in linear friction welded titanium joints, moreover it was possible to get information regarding the microstructure and in particular the extension of the different metallurgical zones induced by the welding process.Linear friction welding （LFW） is an innovative solid-state welding technique that allows to manufacture joints with high mechanical properties. This technology has various applications in the aerospace field; in particular it is used to weld massive structural components made of Ti6A14V. This paper deals with the experimental study of Ti6A14V T-joints welded through LFW, with particular focus on the effectiveness of ultrasonic control in detecting and distinguishing welding defects within the joints. Aiming to this scope, joints with different properties were manufactured and tested： some were free from defects but with different metallurgy, and some had different types of defects. The results obtained proved that the ultrasonic control was an effective method to detect and identify defects in linear friction welded titanium joints, moreover it was possible to get information regarding the microstructure and in particular the extension of the different metallurgical zones induced by the welding process.

关 键 词：TI6A14V Ultrasonic control Linear frictionwelding （LFW） MICROSTRUCTURE DEFECTS 

分 类 号：TG425[金属学及工艺—焊接] P634.42[天文地球—地质矿产勘探]