Microstructure, mechanical, and corrosion properties of electron beam-welded commercially pure titanium after laser shock peening

Chattopadhyay, Angshuman and Muvvala, Gopinath and Sarkar, Sagar and et al, . (2022) Microstructure, mechanical, and corrosion properties of electron beam-welded commercially pure titanium after laser shock peening. The International Journal of Advanced Manufacturing Technology, 118 (1-2). pp. 343-364. ISSN 0268-3768

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Surface properties play a critical role in the structural integrity of any component and this becomes even more critical for weld joints. Laser shock peening (LSP) is one of the non-contact methods which is getting popular in industries to enhance surface properties for improving service life, mainly fatigue of engineering components. In the present study, electron beam welding (EBW) of commercially pure (cp) titanium was carried out at constant line energy with varying scan speeds ranging from 1000 to 1600 mm/min and welding currents from 25 to 40 mA. The influence of the EBW parameters on microstructure, surface micro-hardness, tensile, and fatigue strength was investigated. The effect of LSP on mechanical and corrosion properties of EBW cp titanium was studied. LSP induced a significant amount of compressive residual stresses at the surface through plastic deformation and led to significant improvement in micro-hardness (7–10%) at the sub-surface region of the fusion zone due to finer grain structure. Further, appreciable enhancement in tensile strength (~ 15%) and fatigue life (~ 43%) due to strain hardening and changes in microstructure like twinning within grains was realized. © 2021, The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.

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IITH Creators:
IITH CreatorsORCiD
Muvvala, Gopinathhttps://orcid.org/0000-0002-2133-3686
Item Type: Article
Additional Information: This work was supported by the Department of Heavy Industry (DHI) and Ministry of Human Resource Development (MHRD), Government of India under IMPRINT project 6917, sanction letter 3-18/2015-T.S.-I (Vol.-III) dated 20-01-2017.
Uncontrolled Keywords: Electron beam welding; Fatigue life; Laser shock peening; Tensile strength; Titanium
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 29 Jul 2022 06:14
Last Modified: 29 Jul 2022 06:14
URI: http://raiith.iith.ac.in/id/eprint/10012
Publisher URL: http://doi.org/10.1007/s00170-021-07955-x
OA policy: https://v2.sherpa.ac.uk/id/publication/13456
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