Shear creep of titanium aluminide phase mixtures

Shear creep, the creep under orthogonal principal stresses of opposite sign as opposed to tensile creep, of the near-gamma Ti-44.7 at.% Al-2.0 at% Nb-2.0 at% Cr alloy was investigated by a two-step electric discharge machining (EDM) technique. With an applied shear stress across the cross-section of...

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Bibliographic Details
Published inJournal of materials science letters Vol. 16; no. 8; pp. 601 - 604
Main Author ASHBEE, K. H. G
Format Journal Article
LanguageEnglish
Published Dordrecht Kluwer Academic Publishers 15.04.1997
Subjects
Applied sciences
Creep
Exact sciences and technology
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Shear
Creep curve
Creep
Titanium Aluminides
Intermetallic compound
Niobium alloy
Mechanical properties
Aluminium alloy
Titanium base alloys
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Summary:Shear creep, the creep under orthogonal principal stresses of opposite sign as opposed to tensile creep, of the near-gamma Ti-44.7 at.% Al-2.0 at% Nb-2.0 at% Cr alloy was investigated by a two-step electric discharge machining (EDM) technique. With an applied shear stress across the cross-section of the test piece, large plastic shear strains were observed and measured at 700 and 800 degree C, even for fully lamellar microstructures. Axial tension or compression of a helix of small helix angle created torsion plus a small amount of bending. The maximum shear stress occurred on the inner side of the coil.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0261-8028
DOI:10.1023/A:1018590427195