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Observation of Etch-Pits and LAGB Configurations During Ambient Creep of Ti-6Al-4V Alloy

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Abstract

The present work describes the microstructural features of alloy Ti-6Al-4V during constant stress creep at ambient temperature. Samples tested at 800 and 900 MPa stress levels exhibit the presence of etch-pits and/or voids. The ambient creep strain increases with an increase in applied stress due to higher strain rate sensitivity at higher stresses. A high density of low-angle grain boundaries is noticed in and around etch-pits in the creep-tested specimens due to occurrence of slip. The inverse pole figure obtained by EBSD indicates prismatic texture as the main deformation component in the creep-tested specimens.

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The authors gratefully acknowledge the Director, DMRL and the Defence Research and Development Organization (DRDO), New Delhi, for funding the above research. Useful technical discussions with Mr. V. Singh and Mr. C. M. Omprakash are also acknowledged.

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Authors and Affiliations

  1. Defence Metallurgical Research Laboratory (DRDO), Hyderabad, 500058, India

    Jalaj Kumar (Scientist, Ph.D. Scholar), A. K. Singh (Scientist) & Vikas Kumar (Scientist)

  2. Metallurgical and Materials Engineering Department, IIT Madras, Chennai, 600036, India

    S. Ganesh Sundara Raman (Professor)

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  1. Jalaj Kumar
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  2. A. K. Singh
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  3. S. Ganesh Sundara Raman
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  4. Vikas Kumar
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Correspondence to Jalaj Kumar.

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Manuscript submitted August 3, 2015.

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Kumar, J., Singh, A.K., Raman, S.G.S. et al. Observation of Etch-Pits and LAGB Configurations During Ambient Creep of Ti-6Al-4V Alloy. Metall Mater Trans A 47, 2560–2565 (2016). https://doi.org/10.1007/s11661-016-3443-5

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