Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Elevated temperature microstructure evolution of a medium-entropy CrCoNi superalloy containing Al,Ti

Journal Article · · Journal of Alloys and Compounds
 [1]; ORCiD logo [2];  [3]
  1. The Ohio State Univ., Columbus, OH (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Ohio State Univ., Columbus, OH (United States)
+ Show Author Affiliations

A new medium-entropy superalloy was produced based on the compositions of equiatomic CrCoNi and Ni-base superalloy Inconel 740H. Initial alloy design was performed using Thermo-Calc. The aging response and microstructural stability were assessed following heat treatment at temperatures between 600 and 900 °C and durations up to 100 h. Aging from a fully recrystallized state resulted in negligible grain growth and produced γ’ and σ phases. The same phases were present after aging from a cold-rolled state, but partially recrystallized microstructures resulted in multi-modal size distributions and heterogeneous spatial arrangements. Finally, room temperature hardness measurements were used to correlate aging conditions with quantitative precipitate measurements and mechanical properties.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; DMR-1508505; DMR-1905748; DGE-1343012
OSTI ID:
1607024
Journal Information:
Journal of Alloys and Compounds, Vol. 817, Issue C; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (16)

Table 1(p. 2)table Table 1
Fig. 1(p. 3)figure Fig. 1
Fig. 2(p. 3)figure Fig. 2
Fig. 3(p. 4)figure Fig. 3
Fig. 4(p. 4)figure Fig. 4
Fig. 5(p. 5)figure Fig. 5
Fig. 6(p. 6)figure Fig. 6
Fig. 7(p. 7)figure Fig. 7
Fig. 8(p. 8)figure Fig. 8
Fig. 9(p. 9)figure Fig. 9
Fig. 10(p. 10)figure Fig. 10
Fig. 11(p. 11)figure Fig. 11
Table 2(p. 12)table Table 2
Table 3(p. 12)table Table 3
Fig. 12(p. 13)figure Fig. 12
Fig. 13(p. 13)figure Fig. 13

Similar Records

Related Subjects

36 MATERIALS SCIENCE
medium-entropy alloy
CrCoNi
Ni-base superalloy
microstructural stability
phase decomposition