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Title: Enhancement in creep resistance of Ti-6Al-4V alloy due to boron addition
Authors: Singh, Gaurav
Satyanarayana, D. V. V.
Pederson, Robert
Datta, Ranjan
Ramamurty, Upadrasta
Keywords: Nanoscience & Nanotechnology
Materials Science
Metallurgy & Metallurgical Engineering
Titanium Alloys
Stress Relaxation
B Alloying
Mechanical Characterization
Titanium Matrix Composites
Hardened Austenitic Steel
Fatigue Properties
Life Assessment
Tertiary Creep
Issue Date: 2014
Publisher: Elsevier Science Sa
Citation: Singh, G; Satyanarayana, DVV; Pederson, R; Datta, R; Ramamurty, U, Enhancement in creep resistance of Ti-6Al-4V alloy due to boron addition. Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing 2014, 597, 194-203,
Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Abstract: The addition of B, up to about 0.1 wt%, to Ti-6Al-4V (Ti64) reduces its as-cast grain and colony sizes by an order of magnitude. In this paper, the creep resistance of this alloy modified with 0.06 and 0.11 wt% B additions was investigated in the temperature range of 475-550 degrees C and compared with that of the base alloy. Conventional dead-weight creep tests as well as stress relaxation tests were employed for this purpose. Experimental results show that the B addition enhances both elevated temperature strength and creep properties of Ti64, especially at the lower end of the temperatures investigated. The steady state creep rate in the alloy with 0.11 wt% B was found to be an order of magnitude lower than that in the base alloy, and both the strain at failure as well as the time for rupture increases with the B content. These marked improvements in the creep resistance due to B addition to Ti64 were attributed primarily to the increased number of inter-phase interfaces - a direct consequence of the microstructural refinement that occurs with the B addition - that provide resistance to dislocation motion. (C) 2014 Elsevier B.V. All rights reserved.
Description: Restricted Access
ISSN: 0921-5093
Appears in Collections:Research Articles (Ranjan Datta)

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