Dislocation structures and the character of superdislocations in Ni[sub 3]Al alloys

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(95)90283-X· OSTI ID:6637356

Kerans, R J ^[1]; Hirth, J P ^[2]; Clark, W A.T. ^[3]

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1. Wright Lab., Wright-Patterson AFB, OH (United States). Wright Lab.
2. Washington State Univ., Pullman, WA (United States). Mechanical and Materials Engineering Dept.
3. Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering

Lattice dislocations consisting of pairs of 1/3[112] superpartials bounding extended superlattice intrinsic stacking faults (SISFs) were observed by TEM. They were found to independently react to APB coupled [1/2][110] pairs in the commonly observed pure screw orientation. Boron was observed to have strong effects upon the population of boundary types, grain size, and grain growth. IN addition, small amounts of B completely eliminate widely extended stacking faults. It is concluded that effects of B other than influencing boundary cohesion are important. Implications with regard to Kear-Wilsdorf type locking mechanisms and deformation behavior are discussed.

• OSTI ID: 6637356
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 43:1; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
BORON ALLOYS
CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
ELECTRON MICROPROBE ANALYSIS
INTERMETALLIC COMPOUNDS
METALLURGICAL EFFECTS
MICROANALYSIS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONDESTRUCTIVE ANALYSIS
SAMPLE PREPARATION
SUPERDISLOCATIONS