Characterization of plastic deformation induced by machining in a Ni-based superalloy

Rengen Ding, Craig Knaggs, Hangyue Li, Yue Gang Li, Paul Bowen

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
215 Downloads (Pure)


The surface integrity characteristics of Udimet 720Li subjected to slight damage and damage machining conditions have been studied using a complementary range of techniques such as FIB-SEM, EBSD, TKD, TEM-EDS and nano-indentation. The results indicate the existence of nano-sized grains and no observable tertiary γ′ in regions of severe plastic deformation in the machined surface. The correlation between the machining condition and the resulting plastic deformation is established. Grain refinement of this alloy via machining was achieved by dislocation slip. The nanohardness of the surface of damage machined sample is 40% higher than that of bulk material, which is attributed to the formation of nano-sized grains and high density of dislocations in the superficial layer.
Original languageEnglish
Article number139104
Pages (from-to)1-13
Number of pages13
JournalMaterials Science and Engineering A
Early online date13 Feb 2020
Publication statusPublished - 19 Mar 2020


  • FIB
  • Ni-based superalloy
  • TEM
  • machining


Dive into the research topics of 'Characterization of plastic deformation induced by machining in a Ni-based superalloy'. Together they form a unique fingerprint.

Cite this