Phase Transformation Behavior of Porous TiNi Alloys Produced by Powder Metallurgy Using Magnesium as a Space Holder

Date

2011-09-01

Author

Aydoğmuş, Tarık
Tarhan Bor, Elif
Bor, Sakir

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Porous TiNi alloys with porosities in the range of 51 to 73 pct were prepared successfully applying a new powder metallurgy fabrication route in which magnesium was used as a space holder, resulting in either single austenite phase or a mixture of austenite and martensite phases dictated by the composition of the starting powders, but entirely free from secondary brittle intermetallics, oxides, nitrides, and carbonitrides. Since transformation temperatures are very sensitive to composition, deformation, and oxidation, for the first time, transformation temperatures of porous TiNi alloys were investigated using chemically homogeneous specimens in as-sintered and aged conditions eliminating secondary phase, contamination, and deformation effects. It was found that the porosity content of the foams has no influence on the phase transformation temperatures both in as-sintered and aged conditions, while deformation, oxidation, and aging treatment are severely influential.

Subject Keywords

Mechanics of Materials, Condensed Matter Physics, Metals and Alloys

URI

https://hdl.handle.net/11511/43931

Journal

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE

DOI

https://doi.org/10.1007/s11661-011-0714-z

Collections

Test and Measurement Center In advanced Technologies (MERKEZ LABORATUVARI), Article

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Citation Formats

T. Aydoğmuş, E. Tarhan Bor, and S. Bor, “Phase Transformation Behavior of Porous TiNi Alloys Produced by Powder Metallurgy Using Magnesium as a Space Holder,” METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, pp. 2547–2555, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43931.