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    Investigation of microstructure and mechanical properties of titanium alloy sheet using low power Nd-YAG laser welding process

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    Fulltext not available
    Authors
    Kumar, U.
    Gope, D.
    Kumar, R.
    Chattopadhyaya, S.
    Das, A.
    Pramanik, Alokesh
    Krolczyk, G.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Kumar, U. and Gope, D. and Kumar, R. and Chattopadhyaya, S. and Das, A. and Pramanik, A. and Krolczyk, G. 2018. Investigation of microstructure and mechanical properties of titanium alloy sheet using low power Nd-YAG laser welding process. Metallic Materials / Kovové Materiály. 56 (2): pp. 121-129.
    Source Title
    Metallic Materials / Kovové Materiály
    DOI
    10.4149/km_2018_2_121
    ISSN
    0023-432X
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/68611
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences. All rights reserved. In the present investigation, welding of 1 mm thick Ti-6Al-4V sheet has been done by Pulsed Wave (PW) Nd-YAG laser with a variation of laser power from 100 to 400W and welding speed from 4 to 6 mm s -1 . The microstructure and microhardness of the fusion zone indicate that the finely serrated and regular plate-shaped microstructures and the resultant hardness in the welds are the key factors behind the enhanced tensile strength of all joints. The weld bead size increases with decreasing welding speed and vice versa. The hardness increases around the heat affected zone as compared to that of the parent metal, and it is the maximum at the centre of the welded region. In the investigation, the tensile strength of specimen with different process parameters has been found to be approximately equal to the tensile strength of the parent metal. In XRD analysis, the weld zone has been found to consist of 78 % a and 22 % ß peaks where two ß-titanium peaks (bcc) 100 occur at 39.5110° and 56.9120°.

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