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Enhancement in creep resistance of Ti-6Al-4 V alloy due to Boron addition
Department of Materials Engineering, Indian Institute of Science, Bangalore.
Defence Metallurgical Research Laboratory, Hyderabad.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
International Centre for Materials Science, JNCASR, Jakkur PO, Bangalore.
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2014 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 597, p. 194-203Article in journal (Refereed) Published
Abstract [en]

The addition of B, up to about 0.1 wt.%, to Ti-6Al-4 V 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 °C and compared with that of 0B 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

Place, publisher, year, edition, pages
2014. Vol. 597, p. 194-203
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-7553DOI: 10.1016/j.msea.2013.12.078Local ID: 5f0841f8-4407-4153-9125-3d69aae10a03OAI: oai:DiVA.org:ltu-7553DiVA: diva2:980443
Note
Validerad; 2014; 20140107 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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