Linear Friction Welding of Ti-6Al-4V: Processing, Microstructure and Mechanical Property Inter-relationships

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DOIResolve DOI: http://doi.org/10.1007/s11661-005-0335-5
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TypeArticle
Proceedings titleMetallurgical and Materials Transactions A
ConferenceMetallurgical and Materials Transactions.
ISSN1073-5623
Volume36
Issue8
Pages21492164; # of pages: 16
Subjectlinear friction welding; Ti-6Al-4V; Microstructure; Mechanical Properties
AbstractThe linear friction welding behavior of Ti-6Al-4V was investigated using varying processing conditions of frequency (15 to 70 Hz), amplitude (1 to 3 mm), pressure (50 to 90 MPa), and axial shortening (1 to 2 mm). Examination of linear friction welded Ti-6Al-4V using microscopic techniques indicated that the process requires certain critical conditions at the interface and its adjacent region to be reached for producing joints without structural defects along the weld centerline, such as voids or oxide inclusions. Characterization of the weldments included analysis of the microstructural features of the weld and thermomechanically affected zones (TMAZs) in relation to the parent material. It was observed that in the weld region, exposure to supertransus temperatures (>995 °C) combined with hot-deformation working and rapid cooling after joining produced recrystallization of the beta grain structure that had a Widmanstätten alpha-beta transformation microstructure. In the TMAZ, the bimodal microstructure of the parent material was deformed and the presence of elongated alpha grains with broken beta-phase particles was established. Through examination of the mechanical properties, using microhardness and tensile testing, the integrity of the joints was determined in order to assess the impact of the various processing parameters and to define the optimum welding conditions.
Publication date
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Access conditionunclassified
Peer reviewedNo
NRC numberAMTC-2004-0059
NPARC number8931421
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Record identifier344da2a0-52b0-4b9c-8f4e-6f36535bb239
Record created2009-04-23
Record modified2016-05-09
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