منابع مشابه
Boron segregation in a (Fe, V, B) TiAl based alloy
Primary boron containing dispersoids grown from the melt in a Ti-45.5at.%Al-1.6at.%Fel.lat.%V-0.7at.%B alloy, and then annealed at 1473K, have been investigated using optical microscopy, conventional transmission electron microscopy (CTEM) and analytical electron microscopy. The dispersoid morphology is in the form of high aspect ratio plates, hundreds of microns across and cross-sectional widt...
متن کاملFracture Analysis of High Strain Rate Torsion Samples of Aluminium Zinc Magnesium Copper Alloy
All materials have been historically tested at static loading conditions. With the advent of technology, the study of behaviour of materials at high strain rate was done using various methods. The principle of split Hopkinson bar was used to study high strain rate of material in the range of 102s-1 to 103s-1. Split Hopkinson bars were designed for all three modes of deformation and extensively ...
متن کاملConditions for CET in a gamma TiAl alloy
The solidification of gamma TiAl alloys is of interest to the aerospace and automotive industries. A gamma TiAl multicomponent alloy: Ti–45.5Al–4.7Nb–0.2C–0.2B (at. %) has been the focus of a study to investigate the solidification conditions that led to a Columnar to Equiaxed Transition (CET) in a directional solidification experiment where traditional Bridgman solidification was combined in s...
متن کاملCreep of nearly lamellar TiAl alloy containing W
Effects of W on the creep resistance of two nearly fully lamellar TiAl alloys with 1.0 and 2.0 at.% W have been investigated. In the low stress regime (LS) a nearly quadratic (1:5 < n < 2) creep behavior was observed. It is found that the addition of W can improve the creep resistance; however, the addition of excess W can result in the formation of b phase, which produces an adverse effect on ...
متن کاملHardening and thermal stability of a nanocrystalline CoCrFeNiMnTi0.1 high-entropy alloy processed by high- pressure torsion
A CoCrFeNiMnTi0.1 high-entropy alloy (HEA) was subjected to high-pressure torsion (HPT) processing under 6.0 GPa pressure up to 10 turns. XRD results reveal that the initial and HPT-processed microstructures consist of a single fcc phase and there is no evidence for creating a new phase and the occurrence of a phase transformation during HPT processing. It is shown that there is a gradual evolu...
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ژورنال
عنوان ژورنال: Materials Science and Engineering: A
سال: 2008
ISSN: 0921-5093
DOI: 10.1016/j.msea.2006.12.157