Analysis on the Martensitic Transformation in the Ti-xNb Alloys Using a Phenomenological Theory

Hi Won Jeong; Seung Eon Kim; Chang Yong Jo; Yong Tae Lee; Joong Kuen Park

doi:10.4028/www.scientific.net/SSP.124-126.1669

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EXAFS Analyses on Local Structure of Gallium in Amorphous Selenide Optical Materials Doped with Rare Earths
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Analysis on the Martensitic Transformation in the Ti-xNb Alloys Using a Phenomenological Theory
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Mechanical Strength and Microstructural Characterization of SUS304 Brazed Joints with BNi-2 Filler Metal: Influence of Brazing Temperature and Time
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Characterization of a-Se(As:Cl) Film for Phosphor Coupled X-Ray Light Modulators
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Ab Initio Study with Transition State Theory (TST) for the Calculation of the Barrier Height of Migration Energy of Neutral Indium in Silicon
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Effects of Thermal Annealing on the Atomic Structure of ta-C Films Using Molecular Dynamics Study
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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126Analysis on the Martensitic Transformation in the...

Analysis on the Martensitic Transformation in the Ti-xNb Alloys Using a Phenomenological Theory

Abstract:

The titanium alloys containing the Nb transition elements have been investigated as the Ni-free shape memory and the biomedical alloys with a low elastic modulus. The mechanical properties of the alloys depended upon the meta-stable phases like the α`, α``, ω. To study the martensitic transformations from the β to α`` or α` the Ti-xNb (x=0 to 40 wt%) alloys were melted into the button type ingots using a VAR, and followed by the water-quenching after the soaking at 1000oC for 2hrs. The crystallography of the martensitic phases in the water-quenched alloys was analyzed using a XRD. The diffraction peaks of the orthorhombic martensites were identified by the crystallographic relationship with the bcc matrix. The lattice parameters of the orthorhombic martensites were varied continuously with the contents of the Nb elements. The martensitic transformations of the alloys were studied using the phenomenological theory of Bowles and Mackenzie.