Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys

K. V. Rajulapati; R. O. Scattergood; K. L. Murty; Z. Horita; T. G. Langdon; C. C. Koch

doi:10.1007/s11661-008-9593-3

Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys

K. V. Rajulapati, R. O. Scattergood, K. L. Murty, Z. Horita, T. G. Langdon, C. C. Koch

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

38 Citations (Scopus)

Abstract

The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using high-pressure torsion (HPT). Hardness measurements were made to determine the effects on mechanical properties. Based on existing models, the hardening effect of W particles in HC samples was attributed to Orowan-particle strengthening. Composite-type strengthening due to large W particles appeared to be negligible. Both the compressive strain and shear strain in high pressure torsion added to the strengthening effects without producing a change in the grain size.

Original language	English
Pages (from-to)	2528-2534
Number of pages	7
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	39
Issue number	10
DOIs	https://doi.org/10.1007/s11661-008-9593-3
Publication status	Published - Oct 2008

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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10.1007/s11661-008-9593-3

Cite this

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title = "Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys",

abstract = "The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using high-pressure torsion (HPT). Hardness measurements were made to determine the effects on mechanical properties. Based on existing models, the hardening effect of W particles in HC samples was attributed to Orowan-particle strengthening. Composite-type strengthening due to large W particles appeared to be negligible. Both the compressive strain and shear strain in high pressure torsion added to the strengthening effects without producing a change in the grain size.",

author = "Rajulapati, {K. V.} and Scattergood, {R. O.} and Murty, {K. L.} and Z. Horita and Langdon, {T. G.} and Koch, {C. C.}",

note = "Funding Information: This research was supported by the United States National Science Foundation under Grant No. DMR-0201474. This work is also supported, in part, by a Grant-in-Aid for Scientific Research on Priority Areas, from the Ministry of Education, Culture, Sports, Science and Technology, Japan.",

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language = "English",

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T1 - Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys

AU - Rajulapati, K. V.

AU - Scattergood, R. O.

AU - Murty, K. L.

AU - Horita, Z.

AU - Langdon, T. G.

AU - Koch, C. C.

N1 - Funding Information: This research was supported by the United States National Science Foundation under Grant No. DMR-0201474. This work is also supported, in part, by a Grant-in-Aid for Scientific Research on Priority Areas, from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2008/10

Y1 - 2008/10

N2 - The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using high-pressure torsion (HPT). Hardness measurements were made to determine the effects on mechanical properties. Based on existing models, the hardening effect of W particles in HC samples was attributed to Orowan-particle strengthening. Composite-type strengthening due to large W particles appeared to be negligible. Both the compressive strain and shear strain in high pressure torsion added to the strengthening effects without producing a change in the grain size.

AB - The Al-W alloy powders containing up to 4 at. pct W particles in a nanocrystalline Al matrix were synthesized by ball milling and then hot compacted (HC) at 573 K or cold compacted using high-pressure torsion (HPT). Hardness measurements were made to determine the effects on mechanical properties. Based on existing models, the hardening effect of W particles in HC samples was attributed to Orowan-particle strengthening. Composite-type strengthening due to large W particles appeared to be negligible. Both the compressive strain and shear strain in high pressure torsion added to the strengthening effects without producing a change in the grain size.

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ER -

Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys

Abstract

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