Plastic deformation of a Ti-6% Al-4% V alloy with a strong transverse-type crystallographic a-texture at elevated temperatures - Archive ouverte HAL Access content directly
Journal Articles Materials Science and Engineering: A Year : 1997

Plastic deformation of a Ti-6% Al-4% V alloy with a strong transverse-type crystallographic a-texture at elevated temperatures

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Abstract

The deformation behaviour of (a + B)-Ti with a very sharp texture is influenced by temperature, strain rate and the sense of stress. In this paper the plastic deformation of (a + P)-Ti is investigated in a temperature range between 295 and 1073 K in compression and tension along different directions of the sheet plane (O', 45" and 90" from the rolling direction (RD)). For this temperature range, two phenomena are observed: a dynamic strain ageing (DSA) and a asymmetry of the yield stress associated with the movement of (c + a) dislocations. Electron microscopy of specimens strained in uniaxial tension or compression along [OOOl] at 570 K shows (c+ a) dislocations moving on {liOl} and (1122) planes and an anomalous activity of (c + a) dislocations is observed on the whole range of orientation. We discuss the effect of interstitial solutes on the activity of the (c + a) dislocations between 500 and 750 K and the effect of the non-centrosymmetry for the {liOl} planes on the directional asymmetry of the yield stress associated with the (c + a) movement. Q
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hal-03864549 , version 1 (20-12-2022)

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J.S. Lecomte, M.J. Philippe, P. Klimanek. Plastic deformation of a Ti-6% Al-4% V alloy with a strong transverse-type crystallographic a-texture at elevated temperatures. Materials Science and Engineering: A, 1997, 234-236, pp.869-872. ⟨10.1016/S0921-5093(97)00416-4⟩. ⟨hal-03864549⟩
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