Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum

Ellen Kathleen Cerreta; J. F. Bingert; George Thompson Gray; Michael Frederic Hundley; P. L. Sun

doi:10.1016/j.msea.2007.02.007

Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum

Ellen Kathleen Cerreta
, J. F. Bingert
, George Thompson Gray
, Michael Frederic Hundley
, P. L. Sun

Los Alamos National Laboratory

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Commercial purity aluminum AA1050 billets with similar submicrometer grain sizes but distinctively different boundary structures were obtained by the use of different equal channel angular extrusion (ECAE) routes. Route "A" is defined as no rotation between extrusion passes, while route "C" is rotated 180° between extrusion passes. The microstructure processed by route "A" consists mainly of high-angle boundaries (HABs) while route "C" has primarily low-angle boundary (LAB) structures. Tensile tests conducted on these two microstructures at intermediate and dynamic strain rates at both 77 and 298 K were compared with the results of material tested at quasi-static strain rates. The boundary structure was found to play an important role in the mechanical properties at low temperature.

Original language	English
Pages (from-to)	343-350
Number of pages	8
Journal	Materials Science and Engineering A
Volume	464
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.02.007
State	Published - Aug 25 2007

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title = "Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum",

abstract = "Commercial purity aluminum AA1050 billets with similar submicrometer grain sizes but distinctively different boundary structures were obtained by the use of different equal channel angular extrusion (ECAE) routes. Route {"}A{"} is defined as no rotation between extrusion passes, while route {"}C{"} is rotated 180° between extrusion passes. The microstructure processed by route {"}A{"} consists mainly of high-angle boundaries (HABs) while route {"}C{"} has primarily low-angle boundary (LAB) structures. Tensile tests conducted on these two microstructures at intermediate and dynamic strain rates at both 77 and 298 K were compared with the results of material tested at quasi-static strain rates. The boundary structure was found to play an important role in the mechanical properties at low temperature.",

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T1 - Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum

AU - Cerreta, Ellen Kathleen

AU - Bingert, J. F.

AU - Gray, George Thompson

AU - Hundley, Michael Frederic

AU - Sun, P. L.

PY - 2007/8/25

Y1 - 2007/8/25

N2 - Commercial purity aluminum AA1050 billets with similar submicrometer grain sizes but distinctively different boundary structures were obtained by the use of different equal channel angular extrusion (ECAE) routes. Route "A" is defined as no rotation between extrusion passes, while route "C" is rotated 180° between extrusion passes. The microstructure processed by route "A" consists mainly of high-angle boundaries (HABs) while route "C" has primarily low-angle boundary (LAB) structures. Tensile tests conducted on these two microstructures at intermediate and dynamic strain rates at both 77 and 298 K were compared with the results of material tested at quasi-static strain rates. The boundary structure was found to play an important role in the mechanical properties at low temperature.

AB - Commercial purity aluminum AA1050 billets with similar submicrometer grain sizes but distinctively different boundary structures were obtained by the use of different equal channel angular extrusion (ECAE) routes. Route "A" is defined as no rotation between extrusion passes, while route "C" is rotated 180° between extrusion passes. The microstructure processed by route "A" consists mainly of high-angle boundaries (HABs) while route "C" has primarily low-angle boundary (LAB) structures. Tensile tests conducted on these two microstructures at intermediate and dynamic strain rates at both 77 and 298 K were compared with the results of material tested at quasi-static strain rates. The boundary structure was found to play an important role in the mechanical properties at low temperature.

UR - https://www.scopus.com/pages/publications/34248545079

U2 - 10.1016/j.msea.2007.02.007

DO - 10.1016/j.msea.2007.02.007

M3 - Article

SN - 0921-5093

VL - 464

SP - 343

EP - 350

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

ER -

Enhanced tensile ductility through boundary structure engineering in ultrafine-grained aluminum

Abstract

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