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Physically based model for plasticity and creep of Ti-6Al-4V
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Albeit Ti-6Al-4V has numerous salient properties, its usage for certain applications is limited due to the challenges faced during manufacturing. Understanding the dominant deformation mechanisms and numerically modelling the process is the key to overcome this hurdle. This work investigates plastic deformation of the alloy at strain rates from 0.001/s to 1/s and temperatures between 20 and 1100 Celsius. Pertinent deformation mechanisms of the material when subjected to thermo-mechanical processing is discussed. A physically based constitutive model based on the evolution of immobile dislocation density and excess vacancy concentration is developed. Parameters of the model are obtained by calibration using isothermal compression tests. Model is compared with relaxation test data to demonstrate its validity.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2008. , 55 p.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 2008:40
Research subject
Material Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-18285Local ID: 7cf803a0-b615-11dd-9c2e-000ea68e967bOAI: oai:DiVA.org:ltu-18285DiVA: diva2:991292
Note
Godkänd; 2008; 20081119 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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