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Type: Artigo de periódico
Title: Crystallographic texture evolution in Ti-35Nb alloy deformed by cold rolling
Author: Hayama, AOF
Lopes, JFSC
da Silva, MJG
Abreu, HFG
Caram, R
Abstract: This work presents the results of a microstructural characterization of the Ti-35Nb alloy deformed by cold rolling. Initially, samples of the Ti-35Nb (wt%) alloy were obtained by electric arc melting. After melting, these samples were solution heat-treated at 1000 degrees C for 8 h and water quenched. The resulting microstructure was composed of beta-phase (bcc) combined with orthorhombic martensite (alpha ''). Samples were cold-rolled in multiple passes to reduce their thickness by up to 85% without intermediary annealing. They were then characterized by light optical microscopy, X-ray diffraction and Vickers hardness measurements. Young's modulus was determined by ultrasonic methods and nanoindentation measurements. The texture evolution and orientation relationship between phases were studied by X-ray diffraction and electron backscatter diffraction (EBSD). The results reveal the presence of shear bands in the deformed samples, an orientation of the orthorhombic martensite phase in relation to the rolling direction, and variations of Young's modulus in response to deformation. The textural results of the beta-phase show a typical bcc rolling texture with strong (110) fiber and weak (111) fiber. The intensity of the (110) fiber increases with deformation. (C) 2014 Elsevier Ltd. All rights reserved.
Subject: Ti alloys
Plastic deformation
Young's modulus
Crystallographic texture
Orientation relationship
Country: Inglaterra
Editor: Elsevier Sci Ltd
Rights: fechado
Identifier DOI: 10.1016/j.matdes.2014.04.024
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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