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Title: Exploring novel deformation mechanisms in aluminum–copper alloys using in situ 4D nanomechanical testing

Journal Article · · Acta Materialia

Even after nearly a century of extensive use of aluminum alloys in structural applications, our understanding of such precipitation-strengthened materials is far from complete. With the advent of next generation advanced characterization techniques, our ability to probe materials in unique ways and at different length scales has established a new paradigm for devising new pathways to alloy design by engineering materials and tailoring specific properties at the nanoscale. Here, we perform in situ nanomechanical testing in conjunction with synchrotron -based hard X-ray nanotomography to capture initiation and evolution of damage in 3D in Al-Cu alloys. Precipitates in these alloys are seen to exhibit unprecedented localized deformation in compression, which is attributed to novel observations of kinking in these brittle second-phase particles, accompanied with the generation of a fine polycrystalline texture in the adjacent matrix. We observe a size-dependent transition in precipitate deformation behavior that has been thoroughly investigated using a comprehensive correlative approach.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
U.S. Army Research Laboratory - U.S. Army Research Office (ARO); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1571280
Alternate ID(s):
OSTI ID: 1543047
Journal Information:
Acta Materialia, Vol. 176, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (1)


Figures / Tables (4)