Transition in microstructural and mechanical behavior by reduction of sigma-forming element content in a novel high entropy alloy

Cited 7 time in webofscience Cited 0 time in scopus
  • Hit : 257
  • Download : 0
A novel CrFeMoVMnx high entropy alloy (HEA) system was devised after screening done with thermodynamic constraints. The Mn content was varied (x = 0, 0.5, 1 atomic ratio), with other elements kept in equiatomic ratios, to determine the effect of paired sigma-forming element (PSFE) content on microstructural and mechanical behavior. Alloys were successfully fabricated using a powder metallurgical method after mechanical alloying (MA) for an optimized minimum milling time. The milled powder was sintered using spark plasma sintering (SPS). The microstructural analysis indicated the appearance of a σ phase in the equiatomic quinary CrFeMoVMnx system, and the volume fraction of the σ phase varied directly by Mn content. The Mn0 system exhibited the formation of a single phase solid solution. The failure of thermodynamic prediction, the role of PSFE content and View the MathML sourceMd¯ in σ phase appearance were investigated. The transition in mechanical behavior through a reduction in Mn content was also investigated and Mn1 exhibited the highest fracture strength, of 3183 MPa, and hardness of 868 Hv, while Mn0 displayed the highest plasticity. This study demonstrates higher specific yield strength and hardness values compared to previously reported HEA systems.
Publisher
ELSEVIER SCI LTD
Issue Date
2018-05
Language
English
Article Type
Article
Keywords

SOLID-SOLUTION PHASE; MULTICOMPONENT ALLOYS; TENSILE PROPERTIES; SINGLE-PHASE; STRENGTHENING MECHANISMS; AMORPHOUS PHASE; STABILITY; CRITERION; SYSTEM; CO

Citation

MATERIALS AND DESIGN, v.145, pp.11 - 19

ISSN
0264-1275
DOI
10.1016/j.matdes.2018.02.036
URI
http://hdl.handle.net/10203/241295
Appears in Collection
NE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 7 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0