Segregation of Alloying Elements to Stabilize Teta Prime Phase Interfaces in Al-Cu Based Alloys

2020 ◽  
Author(s):  
Mikhail Petrik ◽  
Yuri Gornostyrev ◽  
Pavel Korzhaviy
Keyword(s):  
Alloying Elements ◽  
Segregation Of Alloying Elements ◽  
Prime Phase

scholarly journals Primary microstructure characterization of Co-20Ni-9Al-7W-3Re-2ti superalloy

2021 ◽  
pp. 44-44
Author(s):  
A. Tomaszewska
Keyword(s):  
Casting Process ◽  
Melting Process ◽  
Alloying Elements ◽  
Technological Problem ◽  
Induction Melting ◽  
Interdendritic Segregation ◽  
Segregation Of Alloying Elements ◽  
Titanium Nickel ◽  
Tungsten Concentration

The characterization of the primary microstructure of the new Co-based superalloy of Co-20Ni-9Al-7W-3Re-2Ti type was shown in this article. The investigated alloy was manufactured by induction melting process from pure feedstock materials. The fundamental technological problem related to Co-Al-W-X multicomponent alloys' casting process is a strong susceptibility to interdendritic segregation of alloying elements, especially tungsten and rhenium. The performed analysis revealed that the observed effect of alloying elements segregation is detectable and much stronger than for Co-9Al-9W and Co-20Ni-7Al-7W alloys, related to titanium, nickel and aluminium migration to inter-dendritic spaces. Consequently, the tungsten concentration gradient between dendritic and interdendritic zones is higher than for Co-9Al-9W and Co-20Ni-7Al-7W alloys. The same situation is in the case of rhenium and cobalt, but Co's concentration in the interdendritic zone is only slightly lower.

Mechanical Properties of Dendritic and Inter-Dendritic Regions in As-Cast Medium-Carbon Steel

2014 ◽  
Vol 894 ◽  
pp. 104-109
Author(s):  
Masoud Al-Gahtani ◽  
Rian Dippenaar
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Hot Rolling ◽  
Nucleation And Growth ◽  
Medium Carbon Steel ◽  
Alloying Elements ◽  
Alloying Element ◽  
Solute Content ◽  
Medium Carbon ◽  
Segregation Of Alloying Elements

During solidification of steel, dendrite nucleation and growth leads to the segregation of alloying elements in the inter-dendritic regions. The dendrite arms are low in carbon while alloying elements segregate to the inter-dendritic regions. During subsequent hot-rolling, this variation in alloying element content leads to the formation of regions of high and low solute content, which in turn, leads to the formation of microstructural banding during heat treatment. In the present study, the respective mechanical properties of these dendritic and inter-dendritic regions were studied in medium carbon steel in order to investigate the rotation of dendrites during hot rolling.

Effect of Micro-segregation of Alloying Elements on the Precipitation Behaviour in Laser Surface Engineered Alloy 718

2021 ◽  
pp. 116844
Author(s):  
Srinivas Aditya Mantri ◽  
Sriswaroop Dasari ◽  
Abhishek Sharma ◽  
Talukder Alam ◽  
Mangesh V. Pantawane ◽  
...  
Keyword(s):  
Laser Surface ◽  
Alloying Elements ◽  
Alloy 718 ◽  
Precipitation Behaviour ◽  
Segregation Of Alloying Elements
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