On the absence of shear cracking and grain boundary cavitation in secondary tensile regions of Ti–6Al–4V–0.1B alloy during hot (α + β)-compression
2013; Taylor & Francis; Volume: 94; Issue: 5 Linguagem: Inglês
10.1080/14786435.2013.855334
ISSN1478-6443
Autores Tópico(s)Microstructure and mechanical properties
ResumoAbstractDeformation instabilities, such as shear cracking and grain boundary cavitation, which are observed in the secondary tensile region of Ti–6Al–4V alloy during compressive deformation in the (α + β)-phase field, do not form in Ti–6Al–4V–0.1B alloy when processed under the same conditions. This has been attributed to the microstructural modifications, e.g. the absence of grain boundary α and adjacent grain boundary retained β layers and a lower proportion of 90o-misoriented α-colonies that occur with boron addition.Keywords: Ti–6Al–4V–0.1B alloyhot compressiondeformation instabilitymicrostructureelectron microscopyEBSD AcknowledgementsWe gratefully acknowledge Drs. D.B. Miracle (AFRL) and S. Tamirisakandala (FMW Composites, USA) for providing the as-cast alloys. We also thank Shri S. Sashidhara for his kind help in the hot compression experiments.Notes1. DARTEC® Zwick/Roell GmbH Group, Germany.2. QUANTA 200, FEI, The Netherlands.3. EDAX, AMETEK Inc., USA.4. JXA-8530F, JEOL, Japan.5. Struers® Lectropol-5, Struers A/S, Germany.
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