Microstructural and high temperature deformation characterization of Ti–45Al–3Nb–(Cr, Mn, Mo, Sc) alloy

Liu, J.; Luan, Qingdong; Wang, X.G.; Peng, Liang

doi:10.1016/j.msea.2010.08.039

Cited by 19 publications

(2 citation statements)

References 16 publications

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“…For a series of directionally solidified Ti 45 wt.% Al 3 wt.% Nb (Cr,Mn,Mo,Sc) alloys minor Sc additions coupled with complex microalloying of Cr, Mn and Mo led to improved high temperature mechanicalproperties arising from a refinement of interlamellar spacings and the dispersive strengthening effect of Ti 3 (Al,Sc) dispersoids 149. Additions of Cr and Mo alone provide improved high temperature creep properties 150.…”

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confidence: 99%

The scandium effect in multicomponent alloys

Riva

Yusenko

Lavery

et al. 2016

International Materials Reviews

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Despite its excellent elemental properties, lightweight nature and good alloying potential, scandium has received relatively little attention in the manufacturing community. The abundance of scandium in the Earth's crust is quite high. It is more abundant than silver, cobalt, lead and tin. But, because scandium is so well dispersed in the lithosphere, it is notoriously difficult to extract in commercial quantities-hence low market availability and high cost. Scandium metallurgy is still a largely unexplored field-but progress is being made. This review aims to summarise advances in scandium metallurgical research over the last decade. The use of scandium as a conventional minor addition to alloys, largely in structural applications, is described. Also, more futuristic functional applications are discussed where details of crystal structures and peculiar symmetries are often of major importance. This review also includes data obtained from more obscure sources (especially Russian publications) which are much less accessible to the wider community. It is clear that more fundamental research is required to elevate the status of scandium from a laboratorybased curiosity to a mainstream alloying element. This is largely uncharted territory. There is much to be discovered.

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confidence: 99%

The scandium effect in multicomponent alloys

Riva

Yusenko

Lavery

et al. 2016

International Materials Reviews

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“…A high volume fraction of precipitates was found in the alloys with higher Al levels. Fig.1 shows a small amount of the precipitates on grain boundaries in the sample of Ti-25V-15Cr-3Al alloy which were grown into platelets after the solution treatment at 1050 °C for 30 min followed by ageing at 700 °C for 4 h. During the last decade, an intensive research has been performed on the titanium aluminum intermetallic alloys by Cao [20] , Liu [21] , Huang [22] , Wang [23] and Ye [24] , et al The results showed that high temperature and high strength Ti-Al alloys could be obtained via dispersive strengthening effect from fine Ti3Al precipitates (α2) and solution strengthening effect from other alloying elements. Fig.2 shows a typical microstructure prior to and after tensile deformation at high temperatures for Ti-45Al-3Nb-0.5Sc alloy.…”

Section: α-Stabilizing Elementsmentioning

confidence: 99%

Recent Development of Effect Mechanism of Alloying Elements in Titanium Alloy Design

Zhao

2014

Rare Metal Materials and Engineering

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The properties of titanium alloy are determined by the chemical composition and microstructure, and the sorts of alloying elements are the main concerns in alloy design. Titanium can be alloyed with various elements to alter its properties, such as high-temperature performance, creep resistance and formability etc. The main objective of this work is to discuss the effect of alloying elements for processing improvement, microstructure optimization and the alloying principle which should be paid attention to in titanium alloy design. Some problems in new alloy design are also discussed and summarized, especially on the interaction of different alloying elements, which leads to the misfit or misorientation dislocations. The interrelationships between alloying composition, phase stability, microstructure and mechanical properties in several classical titanium alloys are critically reviewed.

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