Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys
Mechanical properties of bulk nanocrystalline aluminum-tungsten alloys
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Date
2008-10-01
Authors
Rajulapati, K. V.
Scattergood, R. O.
Murty, K. L.
Horita, Z.
Langdon, T. G.
Koch, C. C.
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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. © The Minerals, Metals & Materials Society and ASM International 2008.
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Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. v.39(10)