Preprint Article Version 1 This version not peer reviewed

Formation of Deformation-Induced Products in a Metastable β-titanium Alloy during High Temperature Compression

Version 1 : Received: 22 January 2018 / Approved: 22 January 2018 / Online: 22 January 2018 (17:17:03 CET)

A peer-reviewed article of this Preprint also exists.

Samiee, A.; Casillas, G.; Ahmed, M.; Savvakin, D.G.; Naseri, R.; Pereloma, E. Formation of Deformation-Induced Products in a Metastable-Β Titanium Alloy during High Temperature Compression. Metals 2018, 8, 100. Samiee, A.; Casillas, G.; Ahmed, M.; Savvakin, D.G.; Naseri, R.; Pereloma, E. Formation of Deformation-Induced Products in a Metastable-Β Titanium Alloy during High Temperature Compression. Metals 2018, 8, 100.

Journal reference: Metals 2018, 8, 100
DOI: 10.3390/met8020100

Abstract

A metastable β-Ti alloy, Ti–10V–3Fe–3Al (wt.%), was subjected to thermos-mechanical processing including the compression test at 725°C, which is below the β transus temperature (780°C), and at strain rate of 10-3s-1. The presence of phases was determined using transmission electron microscopy and X-ray diffraction. Although the dynamic recovery took place together with slip, both deformation-induced α˝ martensite and ω were detected as other operating mechanisms for the first time in metastable-β Ti alloys deformed in α+β region. The volume fraction of stress-induced α˝ was higher than that of the same alloy deformed at room temperature due to higher strain applied. Stress-induced twinning was not operational, which could be related to the priority of slip mechanism at high temperature resulted from thermally-assisted nucleation and lateral migration of kink-pairs.

Subject Areas

metastable Ti alloy; high temperature deformation; stress-induced ω; stress-induced α˝ martensite; transmission electron microscopy; slip; X-ray diffraction.

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