The Variable Potency of TiB&lt;sub&gt;2&lt;/sub&gt; Nucleant Particles in the Grain Refinement of Aluminium by Al-Ti-B Additions

Quested, T. E.; Greer, A.L.; Cooper, P. S.

doi:10.4028/www.scientific.net/msf.396-402.53

Cited by 28 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect has been recently simulated by Mirihanage and Browne [9] and Hunt and Fan [10]. Considering the measured log-normal size distribution of TiB 2 particles [11], less prevalent larger particles nucleate solid at lower undercoolings thereby preventing further nucleation on smaller particles. However, very large particles are more susceptible to sedimentation with increased melt holding.…”

Section: Introductionmentioning

confidence: 93%

Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography

et al. 2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 93%

Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography

et al. 2015

View full text Add to dashboard Cite

“…8). [29] According to the free-growth model, grain initiation occurs at a particular undercooling for each inoculant particle, occurring first on the biggest particles and then on progressively finer particles as the temperature is lowered. As more grains grow, the rate of latent heat release increases and eventually equals or exceeds the rate of external heat extraction thereby giving recalescence.…”

Section: Reviewsmentioning

confidence: 99%

“…Tronche and Greer [34] have assumed a normal (i.e., Gaussian) distribution of particle diameter and performed calculations using the isothermal-melt model. Quested et al [29] have used log-normal distributions with the directionalsolidification model. The normal distribution is mathematically more straightforward, but has the disadvantage of giving small numbers of particles with an unphysical negative diameter; the log-normal distribution is a better match to typical size distributions in metallurgical microstructures and fits well for TiB 2 particles in Al-5Ti-1B refiners (Fig.…”

Section: Design Of Refinersmentioning

confidence: 99%

Grain Refinement of Aluminium Alloys by Inoculation

Greer¹,

Cooper²,

Meredith³

et al. 2003

Adv Eng Mater

Self Cite

258

147

View full text Add to dashboard Cite

A review is given of the studies of aluminium inoculation undertaken within the EU Network “Microstructural Engineering by Solidification Processing” (MEBSP). A wide range of studies of industrial practice of grain refining and of the fundamental mechanisms of nucleation and growth have contributed to improved understanding. Particular advances have been made in understanding the relative performance of different grain refiners.

show abstract

“…Quested 22,23) also found the same tendencies that the grain size of Al matrix composites decreased at rst and then grew up again with decreasing of the average diameter of TiB 2 particles, but the minimum grain size and its corresponding size of TiB 2 particles were different. Particles that were larger than ~1 μm were mostly active, while smaller than ~0.5 μm were mostly inactive.…”

Section: Effect Of Tib 2 Particles On Microstructure Of the Ascast 70mentioning

confidence: 60%

Microstructure and Viscosity of Particles Reinforced 7075 Al Matrix Composites

et al. 2016

View full text Add to dashboard Cite

In-situ TiB 2 particle reinforced 7075 Al alloy was produced by molten salt method (LSM). The effects of TiB 2 content on the microstructure, the melting behavior and the viscosity of 7075 Al alloy were investigated. The experimental results have shown that the microstructure became uniform rosette grains and the grain size decreased with increasing TiB 2 particles. The morphology of grains became bigger with dendritic structure when the TiB 2 particles content is more than 4.5% . The liquidus and solidus temperatures of the TiB 2 /7075 composites were rstly increased and then decreased with the increase of the content of TiB 2 particles. The semisolid processing temperature window of 7075 Al alloy became narrow after adding TiB 2 particles, and the liquid fraction of TiB 2 /7075 composites with increasing temperature was more sensitive than 7075 Al alloy. The apparent viscosity of the 4.5%TiB 2 /7075 composite was the lowest among 3.0, 4.5 and 9.0%TiB 2 /7075 aluminum matrix composites respectively. The apparent viscosity of the 9.0%TiB 2 /7075 was less than that of 7075 alloy but was greater than that of 4.5%TiB 2 /7075 composite under the same conditions. The viscosities of the composites decreased sharply with increasing shear rate, and the change with the shear rate were more sensitive than that of the 7075 alloy.

show abstract

The Variable Potency of TiB<sub>2</sub> Nucleant Particles in the Grain Refinement of Aluminium by Al-Ti-B Additions

Cited by 28 publications

References 0 publications

Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography

Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography

Grain Refinement of Aluminium Alloys by Inoculation

Microstructure and Viscosity of Particles Reinforced 7075 Al Matrix Composites

Contact Info

Product

Resources

About