Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7988846 | Intermetallics | 2013 | 5 Pages |
Abstract
Equiatomic, face-centered-cubic, high- and medium-entropy alloys were arc melted, hot-rolled to produce recrystallized sheets, and tensile tested. The alloys having the compositions CrMnFeCoNi and CrFeCoNi exhibited a strong temperature-dependent decrease in strength with increasing temperature from â196 °C to 1000 °C, and a relatively weak strain-rate dependence (at 10â3 and 10â1 sâ1). Ductility did not vary inversely with yield strength; rather, when strength doubled as the test temperature was decreased from room temperature to â196 °C, elongation to fracture increased by a factor of 1.5 to >60%. A high degree of work hardening, possibly due to deformation-induced nanotwinning, postpones the onset of necking and may be the reason for the ductility increase.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
A. Gali, E.P. George,