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Study on cracks in laser direct-cladded titanium layer on low carbon steel
Publikationstyp
Journal Article
Date Issued
2012-02-01
Sprache
English
Journal
Volume
48
Issue
2
Start Page
142
End Page
147
Citation
Jinshu Xuebao/Acta Metallurgica Sinica 48 (2): 142-147 (2012-02-01)
Publisher DOI
Scopus ID
Publisher
Springer
By adjusting laser power and nozzle speed in laser cladding technology, crack-free titanium layer with even thickness and titanium mass percentage over 99%, was obtained on the substrate of low carbon steel without any intermediate layer when heat input was between 12-20 J/mm. The temperature field and the mechanical strain were simulated. Together with phase diagram and EDS, it was found that an interface zone, consisted of TiFe, (TiFe+β-Ti) eutectic compound and α-Ti, was formed between the titanium layer and the substrate. The interface zone is brittle and cracks occur in it. In titanium layer crack also occur if the mechanical strain exceeds the critical plasticity of metal. By reducing heat input, the mechanical strain decreases, thus a crack-free titanium layer with even thickness can be obtained.
Subjects
Clading Ti
Crack
Finite element analysis
Laser cladding
Low carbon steel
Strain analysis
DDC Class
530: Physik