X. Chong, Pin-Wen Guan, Mingyu Hu
Sep 1, 2018
Citations
1
Influential Citations
15
Citations
Journal
Scripta Materialia
Abstract
Abstract The heat resistance of the η carbides is important for red hardness and hot strength of high tungsten iron-base alloys. The crystal structure and exact composition of η carbides in this work are revealed to be cubic, Fe3.01W2.33Cr0.38V0.28C1.06 by extraction, X-ray diffraction refinement and electron probe micro-analysis. Defect formation energy calculations show that Cr and V occupy W sites in the lattice. Cr and V decrease the mechanical properties and weaken the elastic heat resistance of η carbides, which is attributed to the C Cr and C V bonds weaker than C W bonds and the C Cr bonds population decrease at high temperature.