Young's modulus and damping of Ti6Al4V alloy as a function of heat treatment and oxygen concentration

Lee, Y.T.; Welsch, G.

doi:10.1016/0921-5093(90)90097-m

Cited by 162 publications

(83 citation statements)

References 14 publications

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“…These findings are expected because of the relative sensitivity of the mechanical properties to the processing conditions for Ti-6Al-4V; that is, the changes in thermomechanical history (e.g., cooling rate, heat treatment temperature, and deformation), and thus inevitably the microstructure, have been reported to affect the yield stress of Ti-6Al-4V markedly. [42][43][44][45] It is noteworthy that the yield stress determined for the BM by DIC is almost similar to that reported by Cao et al [13] taken from the same batch material, which validates the DIC evaluations in this work.…”

Section: F Local Tensile Propertiessupporting

confidence: 79%

Effect of Postweld Heat Treatment on Microstructure, Hardness, and Tensile Properties of Laser-Welded Ti-6Al-4V

Kabir

Cao

Gholipour

et al. 2012

Metall Mater Trans A

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The effects of postweld heat treatment (PWHT) on 3.2-mm-and 5.1-mm-thick Ti-6Al-4V butt joints welded using a continuous wave (CW) 4-kW Nd:YAG laser welding machine were investigated in terms of microstructural transformations, welding defects, and hardness, as well as global and local tensile properties. Two postweld heat treatments, i.e., stress-relief annealing (SRA) and solution heat treatment followed by aging (STA), were performed and the weld qualities were compared with the as-welded condition. A digital image correlation technique was used to determine the global tensile behavior for the transverse welding samples. The local tensile properties including yield strength and maximum strain were determined, for the first time, for the laser-welded Ti-6Al-4V. The mechanical properties, including hardness and the global and local tensile properties, were correlated to the microstructure and defects in the as-welded, SRA, and STA conditions.

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Section: F Local Tensile Propertiessupporting

confidence: 79%

Effect of Postweld Heat Treatment on Microstructure, Hardness, and Tensile Properties of Laser-Welded Ti-6Al-4V

Kabir

Cao

Gholipour

et al. 2012

Metall Mater Trans A

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“…The Young's modulus can be written according to Fan (1993); Lee and Welsch (1990) as a linear rule of mixtures. However, since the elastic modulus of the individual phases are not available at elevated temperatures, the effective modulus is used here.…”

Section: Coupling Of Phase and Flow Stress Modelsmentioning

confidence: 99%

A model for Ti–6Al–4V microstructure evolution for arbitrary temperature changes

Murgau

Pederson

Lindgren

2012

Modelling Simul. Mater. Sci. Eng.

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This thesis is devoted to microstructure modelling of Ti-6Al-4V. The microstructure and the mechanical properties of titanium alloys are highly dependent on the temperature history experienced by the material. The developed microstructure model accounts for thermal driving forces and is applicable for general temperature histories. It has been applied to study wire feed additive manufacturing processes that induce repetitive heating and cooling cycles. The microstructure model adopts internal state variables to represent the microstructure through microstructure constituents' fractions in finite element simulation. This makes it possible to apply the model efficiently for large computational models of general thermomechanical processes. The model is calibrated and validated versus literature data. It is applied to Gas Tungsten Arc Welding -also known as Tungsten Inert Gas welding-wire feed additive manufacturing process. Four quantities are calculated in the model: the volume fraction of phase, consisting of Widmanstätten , grain boundary , and martensite . The phase transformations during cooling are modelled based on diffusional theory described by a Johnson-Mehl-AvramiKolmogorov formulation, except for diffusionless martensite formation where the Koistinen-Marburger equation is used. A parabolic growth rate equation is used for the to transformation upon heating. An added variable, structure size indicator of Widmanstätten , has also been implemented and calibrated. It is written in a simple Arrhenius format. The microstructure model is applied to in finite element simulation of wire feed additive manufacturing. Finally, coupling with a physically based constitutive model enables a comprehensive and predictive model of the properties that evolve during processing.

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“…Metastable titanium alloys are interesting in deformation properties, such as extraordinary elasticity, 1,2) various deformation mode, [3][4][5] shape memory effect 6) and marvelous clayey plasticity; 7) therefore they are now recognized as advanced materials for biomedical applications, 8,9) etc. These properties are concerned with the inherent transformations including 0 -, 00 -martensites and !-phase athermally formed by quench of the alloys.…”

Section: Introductionmentioning

confidence: 99%

Tensile Behavior and Cold Workability of Ti-Mo Alloys

et al. 2004

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Three kinds of titanium-molybdenum alloy, Ti-8Mo, Ti-14Mo and Ti-20Mo (mass%), quenched from 1223 K were investigated to clarify the tensile behavior and the cold workability using tensile test and conical cup test. In the quenched state Ti-14Mo showed the superior workability. Ti-20Mo has poor ductility in tensile test, but has relatively good formability in conical cup test. Both Ti-8Mo and Ti-14Mo became brittle through a cold rolling of 50% reduction in thickness; however Ti-20Mo did not change in workability by the cold rolling at all. Hardness remarkably increased with rolling reduction in Ti-8Mo and Ti-14Mo, but was almost constant in Ti-20Mo, especially with Ti-20Mo containing high oxygen. Microstructure of Ti-8Mo and Ti-14Mo rolled until seventy-odd percentage exhibited very fine structure and changed to 0 þ and structure, respectively. On the other hand Ti-20Mo hardly changed in microstructure by a cold rolling besides the formation of some band-like products. The product was composed of single variant of commensurate !-phase, whereas the matrix contained four variants of incommensurate !-phase. It was suggested that the peculiar deformation mechanism of Ti-20Mo was concerned with stress induced transformation of the !-phase.

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Young's modulus and damping of Ti6Al4V alloy as a function of heat treatment and oxygen concentration

Cited by 162 publications

References 14 publications

Effect of Postweld Heat Treatment on Microstructure, Hardness, and Tensile Properties of Laser-Welded Ti-6Al-4V

Effect of Postweld Heat Treatment on Microstructure, Hardness, and Tensile Properties of Laser-Welded Ti-6Al-4V

A model for Ti–6Al–4V microstructure evolution for arbitrary temperature changes

Tensile Behavior and Cold Workability of Ti-Mo Alloys

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