Discussion of ''The role of microstructure on strength and ductility of hot-extruded mechanically alloyed NiAl''

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02652330· OSTI ID:6999792

Cotton, J D ^[1]; Noebe, R D ^[2]

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1. Los Alamos National Lab., NM (United States). Materials Science and Technology Division
2. NASA-Lewis Research Center, Cleveland, OH (United States)

In a recent article by Dollar, Dymek, Hwang, and Nash (DDHN), they state that the presence of a <110> fiber texture promotes <110>[110] slip in NiAl during room-temperature compression. This conclusion is based on their observation that material with a <110> fiber texture displayed greater compressive ductility than material with a <111> texture. The rationale for this effect is that the combination of <110>[110] slip with the usual <100>[011] produces five independent slip systems, satisfying the von Mises criterion, and thereby increases the ductility. However, the authors feel that DDHN have made several assumptions in their work which weaken their conclusions. These concern the <110> slip plane, amount of <110> dislocation activity, treatment of compressive strain as ''ductility,'' and stoichiometry of the low ductility material. Each of these issues is discussed subsequently.

• OSTI ID: 6999792
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:10; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
360103 -- Metals &amp; Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS