In:
Science, American Association for the Advancement of Science (AAAS), Vol. 374, No. 6570 ( 2021-11-19), p. 940-941
Abstract:
Multicomponent or high-entropy alloys (HEAs), in which no one metal predominates, have expanded the alloy design space. Like conventional alloys, HEAs with greater strength often suffer from low ductility, which can limit their toughness—their ability to absorb energy without fracturing. On page 984 of this issue, Pan et al. ( 1 ) propose a methodology to improve the strength of HEAs while maintaining ductility. They engineer gradient dislocation cell structures in a single face-centered cubic (fcc) phase Al 0.1 CoCrFeNi alloy that contains nanoscale (∼50 nm) randomly oriented cells in grains. The strength and ductility of this material, as well as the yield strength (the stress needed to start plastic deformation), is superior to that of the same composition with coarse or fine grains and of other metals with gradient nanograins and nanotwins.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.abm0120
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2021
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
Permalink
