Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Microstructural evolution and mechanical property development with nickel addition in low-carbon weld butt joints
 
research article

Microstructural evolution and mechanical property development with nickel addition in low-carbon weld butt joints

Mao, Gaojun
•
Cao, Rui
•
Cayron, Cyril
Show more
2018
Journal of Materials Processing Technology

Four metal powder flux-cored wires with added nickel (Ni) were designed to systematically investigate how Ni influences the microstructure and toughness in low-carbon bainitic weld metals (WMs). The microstructure was safely predicted by utilizing reasonable welding craft parameters (i.e., appropriate heat input and proper interpass temperature). Microstructural characterization, crystallographic analysis, microhardness mapping, fracture microparameter measurement, and finite element method calculations were all taken into account. This work showed that more martensite transformation occurs with increasing Ni and that the ductile-brittle transition temperature drops with added Ni. The boundaries with low-angle misorientation (i.e., less than 4°) enhance microhardness and the optimal inclusion size is in the range of 0.3–0.45 μm, thus revealing the reasons for the resulting microhardness and toughness variations. In addition, the high-angle grain boundaries in close-packed plane packets effectually prevent cracks. From a practical perspective, 4 wt.% Ni could be the best design for welding wires in the present work. This work confirmed many of the results found in recently published literature. These results provide a reference for the composition design of welding wires and the processing method of WMs.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.jmatprotec.2018.07.009
Author(s)
Mao, Gaojun
Cao, Rui
Cayron, Cyril
Logé, Roland
Guo, Xili
Jiang, Yong
Chen, Jianhong
Date Issued

2018

Published in
Journal of Materials Processing Technology
Volume

262

Start page

638

End page

649

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMTM  
Available on Infoscience
November 12, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/151338
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés